TY  - JOUR
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Rogan, Jelena R.
AU  - Lačnjevac, Uroš
AU  - Jovanović, Vladislava M.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4821
AB  - Pt, PtSn and PtSnO2 catalysts supported on high surface area carbon synthesized by microwave assisted polyol procedure were tested for methanol oxidation. Based on TGA, EDX and XRD analysis, PtSn/C is composed of Pt and Pt3Sn phase while the rest of Sn is present in a form of very small tin oxide particles. This paper focuses on structure-activity relationships for CO tolerance and methanol oxidation reactions after addition of Sn to Pt catalysts. Alloying of Sn with Pt improves the rate of CO oxidation despite the fact that the pure Sn does not react with CO and therefore activity for methanol oxidation increases ~ 2 times in comparison to Pt/C catalyst. PtSn/C catalyst shows small advantage in comparison with PtSnO2/C catalyst due to the alloyed Sn and its electronic effect. Long term stability tests also confirmed that PtSn/C catalyst is somewhat better in comparison to PtSnO2/C.
PB  - Serbia : Electrochemical Science Group
T2  - International Journal of Electrochemical Science
T1  - Carbon Supported PtSn versus PtSnO2 Catalysts in Methanol Oxidation
VL  - 16
VL  - 2
SP  - 1
SP  - 16
DO  - 10.20964/2021.02.55
ER  - 

@article{
author = "Stevanović, Sanja and Tripković, Dušan and Gavrilović-Wohlmuther, Aleksandra and Rogan, Jelena R. and Lačnjevac, Uroš and Jovanović, Vladislava M.",
year = "2021",
abstract = "Pt, PtSn and PtSnO2 catalysts supported on high surface area carbon synthesized by microwave assisted polyol procedure were tested for methanol oxidation. Based on TGA, EDX and XRD analysis, PtSn/C is composed of Pt and Pt3Sn phase while the rest of Sn is present in a form of very small tin oxide particles. This paper focuses on structure-activity relationships for CO tolerance and methanol oxidation reactions after addition of Sn to Pt catalysts. Alloying of Sn with Pt improves the rate of CO oxidation despite the fact that the pure Sn does not react with CO and therefore activity for methanol oxidation increases ~ 2 times in comparison to Pt/C catalyst. PtSn/C catalyst shows small advantage in comparison with PtSnO2/C catalyst due to the alloyed Sn and its electronic effect. Long term stability tests also confirmed that PtSn/C catalyst is somewhat better in comparison to PtSnO2/C.",
publisher = "Serbia : Electrochemical Science Group",
journal = "International Journal of Electrochemical Science",
title = "Carbon Supported PtSn versus PtSnO2 Catalysts in Methanol Oxidation",
volume = "16, 2",
pages = "1-16",
doi = "10.20964/2021.02.55"
}

Stevanović, S., Tripković, D., Gavrilović-Wohlmuther, A., Rogan, J. R., Lačnjevac, U.,& Jovanović, V. M.. (2021). Carbon Supported PtSn versus PtSnO2 Catalysts in Methanol Oxidation. in International Journal of Electrochemical Science
Serbia : Electrochemical Science Group., 16, 1.
https://doi.org/10.20964/2021.02.55

Stevanović S, Tripković D, Gavrilović-Wohlmuther A, Rogan JR, Lačnjevac U, Jovanović VM. Carbon Supported PtSn versus PtSnO2 Catalysts in Methanol Oxidation. in International Journal of Electrochemical Science. 2021;16:1.
doi:10.20964/2021.02.55 .

Stevanović, Sanja, Tripković, Dušan, Gavrilović-Wohlmuther, Aleksandra, Rogan, Jelena R., Lačnjevac, Uroš, Jovanović, Vladislava M., "Carbon Supported PtSn versus PtSnO2 Catalysts in Methanol Oxidation" in International Journal of Electrochemical Science, 16 (2021):1,
https://doi.org/10.20964/2021.02.55 . .

TY  - JOUR
AU  - Kaluđerović, Branka
AU  - Jovanović, Vladislava M.
AU  - Stevanović, Sanja
AU  - Bogdanov, Zarko D.
AU  - Sanja Krstić
AU  - Dodevski, Vladimir
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4221
AB  - Carbon materials with developed porosity are usually used as supports for platinum catalysts. Physico-chemical characteristics of the support influence the properties of platinum deposited and its catalytic activity. In our studies, we deposited platinum on carbon fibrous like materials obtained from platanus seeds-achenes. The precursor was chemically activated with different reagents: NaOH, pyrogallol, and H2O2, before the carbonization process. Platinum was deposited on all substrates to study the influence of the substrate properties on the activity of the catalyst. Carbon materials were characterized by nitrogen adsorption/desorption isotherms measurements, X-ray diffraction, and scanning electron microscopy. It was noticed that the adsorption characteristics of carbon support affected the structure of platinum deposits and thus their activity.
PB  - Serbia : Association of Metallurgical Engineers of Serbia
T2  - Metallurgical and Materials Engineering
T1  - Characterization of carbon fibrous material from platanus achenes as platinum catalysts support
VL  - 26
IS  - 4
SP  - 375
EP  - 383
DO  - 10.30544/588
ER  - 

@article{
author = "Kaluđerović, Branka and Jovanović, Vladislava M. and Stevanović, Sanja and Bogdanov, Zarko D. and Sanja Krstić and Dodevski, Vladimir",
year = "2020",
abstract = "Carbon materials with developed porosity are usually used as supports for platinum catalysts. Physico-chemical characteristics of the support influence the properties of platinum deposited and its catalytic activity. In our studies, we deposited platinum on carbon fibrous like materials obtained from platanus seeds-achenes. The precursor was chemically activated with different reagents: NaOH, pyrogallol, and H2O2, before the carbonization process. Platinum was deposited on all substrates to study the influence of the substrate properties on the activity of the catalyst. Carbon materials were characterized by nitrogen adsorption/desorption isotherms measurements, X-ray diffraction, and scanning electron microscopy. It was noticed that the adsorption characteristics of carbon support affected the structure of platinum deposits and thus their activity.",
publisher = "Serbia : Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical and Materials Engineering",
title = "Characterization of carbon fibrous material from platanus achenes as platinum catalysts support",
volume = "26",
number = "4",
pages = "375-383",
doi = "10.30544/588"
}

Kaluđerović, B., Jovanović, V. M., Stevanović, S., Bogdanov, Z. D., Sanja Krstić,& Dodevski, V.. (2020). Characterization of carbon fibrous material from platanus achenes as platinum catalysts support. in Metallurgical and Materials Engineering
Serbia : Association of Metallurgical Engineers of Serbia., 26(4), 375-383.
https://doi.org/10.30544/588

Kaluđerović B, Jovanović VM, Stevanović S, Bogdanov ZD, Sanja Krstić, Dodevski V. Characterization of carbon fibrous material from platanus achenes as platinum catalysts support. in Metallurgical and Materials Engineering. 2020;26(4):375-383.
doi:10.30544/588 .

Kaluđerović, Branka, Jovanović, Vladislava M., Stevanović, Sanja, Bogdanov, Zarko D., Sanja Krstić, Dodevski, Vladimir, "Characterization of carbon fibrous material from platanus achenes as platinum catalysts support" in Metallurgical and Materials Engineering, 26, no. 4 (2020):375-383,
https://doi.org/10.30544/588 . .

TY  - JOUR
AU  - Tripković, Dušan
AU  - Popović, Ksenija
AU  - Jovanović, Vladislava M.
AU  - Nogueira, Jessica Alves
AU  - Varela, Hamilton Brandao
AU  - Lopes, Pietro Papa
AU  - Strnčnik, Dušan
AU  - Stamenković, Vojislav
AU  - Marković, Nenad M.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2876
AB  - Ability to utilize structure-function relationship in the design of electrocatalysts relies on fundamental understanding of physicochemical processes at the topmost surface. It has been demonstrated that reaction rate for majority of electrochemical reactions exhibit notable dependence on geometric arrangement of surface atoms due to varying levels of binding strength between different atomic structures and adsorbate molecules. Control of surface structure at nanoscale is being investigated here through a thin film approach. The surface characteristics of electrochemically deposited Pt thin films were probed for electrooxidation of small organic molecules such as formic acid and methanol. The low-index Pt single crystal electrodes were used for reactivity benchmarking which later guided thermal annealing processes, and ultimately, fine tuning of the ratio between (1 1 1) and (1 0 0) surface facets on Pt thin films. The tailored thin film structure is responsible for significant activation of both formic acid and methanol oxidation reactions, which justifies the approach.
PB  - Elsevier
T2  - Journal of Catalysis
T1  - Tuning of catalytic properties for electrooxidation of small organic molecules on Pt-based thin films via controlled thermal treatment
VL  - 371
SP  - 96
EP  - 105
DO  - 10.1016/j.jcat.2019.01.038
ER  - 

@article{
author = "Tripković, Dušan and Popović, Ksenija and Jovanović, Vladislava M. and Nogueira, Jessica Alves and Varela, Hamilton Brandao and Lopes, Pietro Papa and Strnčnik, Dušan and Stamenković, Vojislav and Marković, Nenad M.",
year = "2019",
abstract = "Ability to utilize structure-function relationship in the design of electrocatalysts relies on fundamental understanding of physicochemical processes at the topmost surface. It has been demonstrated that reaction rate for majority of electrochemical reactions exhibit notable dependence on geometric arrangement of surface atoms due to varying levels of binding strength between different atomic structures and adsorbate molecules. Control of surface structure at nanoscale is being investigated here through a thin film approach. The surface characteristics of electrochemically deposited Pt thin films were probed for electrooxidation of small organic molecules such as formic acid and methanol. The low-index Pt single crystal electrodes were used for reactivity benchmarking which later guided thermal annealing processes, and ultimately, fine tuning of the ratio between (1 1 1) and (1 0 0) surface facets on Pt thin films. The tailored thin film structure is responsible for significant activation of both formic acid and methanol oxidation reactions, which justifies the approach.",
publisher = "Elsevier",
journal = "Journal of Catalysis",
title = "Tuning of catalytic properties for electrooxidation of small organic molecules on Pt-based thin films via controlled thermal treatment",
volume = "371",
pages = "96-105",
doi = "10.1016/j.jcat.2019.01.038"
}

Tripković, D., Popović, K., Jovanović, V. M., Nogueira, J. A., Varela, H. B., Lopes, P. P., Strnčnik, D., Stamenković, V.,& Marković, N. M.. (2019). Tuning of catalytic properties for electrooxidation of small organic molecules on Pt-based thin films via controlled thermal treatment. in Journal of Catalysis
Elsevier., 371, 96-105.
https://doi.org/10.1016/j.jcat.2019.01.038

Tripković D, Popović K, Jovanović VM, Nogueira JA, Varela HB, Lopes PP, Strnčnik D, Stamenković V, Marković NM. Tuning of catalytic properties for electrooxidation of small organic molecules on Pt-based thin films via controlled thermal treatment. in Journal of Catalysis. 2019;371:96-105.
doi:10.1016/j.jcat.2019.01.038 .

Tripković, Dušan, Popović, Ksenija, Jovanović, Vladislava M., Nogueira, Jessica Alves, Varela, Hamilton Brandao, Lopes, Pietro Papa, Strnčnik, Dušan, Stamenković, Vojislav, Marković, Nenad M., "Tuning of catalytic properties for electrooxidation of small organic molecules on Pt-based thin films via controlled thermal treatment" in Journal of Catalysis, 371 (2019):96-105,
https://doi.org/10.1016/j.jcat.2019.01.038 . .

TY  - JOUR
AU  - Krstajić Pajić, Mila N.
AU  - Stevanović, Sanja
AU  - Radmilović, Vuk V.
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka R.
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2490
AB  - Low loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.
PB  - Elsevier
T2  - Applied Catalysis B-Environmental
T1  - Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method
VL  - 243
SP  - 585
EP  - 593
DO  - 10.1016/j.apcatb.2018.10.064
ER  - 

@article{
author = "Krstajić Pajić, Mila N. and Stevanović, Sanja and Radmilović, Vuk V. and Gavrilović-Wohlmuther, Aleksandra and Zabinski, Piotr and Elezović, Nevenka R. and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2019",
abstract = "Low loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method",
volume = "243",
pages = "585-593",
doi = "10.1016/j.apcatb.2018.10.064"
}

Krstajić Pajić, M. N., Stevanović, S., Radmilović, V. V., Gavrilović-Wohlmuther, A., Zabinski, P., Elezović, N. R., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2019). Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method. in Applied Catalysis B-Environmental
Elsevier., 243, 585-593.
https://doi.org/10.1016/j.apcatb.2018.10.064

Krstajić Pajić MN, Stevanović S, Radmilović VV, Gavrilović-Wohlmuther A, Zabinski P, Elezović NR, Radmilović VR, Gojković SL, Jovanović VM. Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method. in Applied Catalysis B-Environmental. 2019;243:585-593.
doi:10.1016/j.apcatb.2018.10.064 .

Krstajić Pajić, Mila N., Stevanović, Sanja, Radmilović, Vuk V., Gavrilović-Wohlmuther, Aleksandra, Zabinski, Piotr, Elezović, Nevenka R., Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method" in Applied Catalysis B-Environmental, 243 (2019):585-593,
https://doi.org/10.1016/j.apcatb.2018.10.064 . .

TY  - JOUR
AU  - Krstajić Pajić, Mila N.
AU  - Stevanović, Sanja
AU  - Radmilović, Vuk V.
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka R.
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2897
AB  - Low loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.
PB  - Amsterdam : Elsevier Science Bv
T2  - Applied Catalysis B-Environmental
T1  - Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method
VL  - 243
SP  - 585
EP  - 593
DO  - 10.1016/j.apcatb.2018.10.064
ER  - 

@article{
author = "Krstajić Pajić, Mila N. and Stevanović, Sanja and Radmilović, Vuk V. and Gavrilović-Wohlmuther, Aleksandra and Zabinski, Piotr and Elezović, Nevenka R. and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2019",
abstract = "Low loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.",
publisher = "Amsterdam : Elsevier Science Bv",
journal = "Applied Catalysis B-Environmental",
title = "Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method",
volume = "243",
pages = "585-593",
doi = "10.1016/j.apcatb.2018.10.064"
}

Krstajić Pajić, M. N., Stevanović, S., Radmilović, V. V., Gavrilović-Wohlmuther, A., Zabinski, P., Elezović, N. R., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2019). Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method. in Applied Catalysis B-Environmental
Amsterdam : Elsevier Science Bv., 243, 585-593.
https://doi.org/10.1016/j.apcatb.2018.10.064

Krstajić Pajić MN, Stevanović S, Radmilović VV, Gavrilović-Wohlmuther A, Zabinski P, Elezović NR, Radmilović VR, Gojković SL, Jovanović VM. Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method. in Applied Catalysis B-Environmental. 2019;243:585-593.
doi:10.1016/j.apcatb.2018.10.064 .

Krstajić Pajić, Mila N., Stevanović, Sanja, Radmilović, Vuk V., Gavrilović-Wohlmuther, Aleksandra, Zabinski, Piotr, Elezović, Nevenka R., Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method" in Applied Catalysis B-Environmental, 243 (2019):585-593,
https://doi.org/10.1016/j.apcatb.2018.10.064 . .

TY  - JOUR
AU  - Tripković, Dušan
AU  - Stevanović, Sanja
AU  - Gavrilović, Aleksandra
AU  - Rogan, Jelena R.
AU  - Lačnjevac, Uroš
AU  - Kravić, Tamara
AU  - Jovanović, Vladislava M.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2465
AB  - In our previous paper, we described in detail studies of Sn influence on electrocatalytic activity of PtSn catalyst for CO and formic acid oxidation (StevanoviAc et al., J. Phys. Chem. C, 118 (2014) 278-289). The catalyst was composed of a Pt phase, Pt3Sn alloy and very small SnO2 particles. Different electrochemical treatment enabled studies of PtSn/C having Sn both in surface and subsurface layers and skeleton structure of this catalyst with Sn only in subsurface layers. The results obtained revealed the promotional effect of surface Sn whether alloyed or as oxide above all in preventing accumulation of CO and blocking the surface Pt atoms. As a consequence, in formic acid oxidation, the currents are not entering the plateau but increasing constantly until reaching a maximum. It was concluded that at lower potentials the effect of Sn on formic acid oxidation was predominantly electronic but with increasing the potential bi-functional mechanism prevailed due to the leading role of SnO2. This role of SnO2 is restated in the present study. Therefore, CO and formic acid oxidation were examined at PtSnO2/C catalyst. The catalyst was synthesised by the same microwave-assisted polyol procedure. According to XRD analysis, the catalyst is composed of a Pt phase and SnO2 phase. The reactions were examined on PtSnO2/C catalyst treated on the same way as PtSn/C. Comparing the results obtained, the role of SnO2 is confirmed and at the same time the significance of alloyed Sn and its electronic effect is revealed.
PB  - Springer, New York
T2  - Electrocatalysis
T1  - The Role of SnO2 on Electrocatalytic Activity of PtSn Catalysts
VL  - 9
IS  - 1
SP  - 76
EP  - 85
DO  - 10.1007/s12678-017-0424-4
ER  - 

@article{
author = "Tripković, Dušan and Stevanović, Sanja and Gavrilović, Aleksandra and Rogan, Jelena R. and Lačnjevac, Uroš and Kravić, Tamara and Jovanović, Vladislava M.",
year = "2018",
abstract = "In our previous paper, we described in detail studies of Sn influence on electrocatalytic activity of PtSn catalyst for CO and formic acid oxidation (StevanoviAc et al., J. Phys. Chem. C, 118 (2014) 278-289). The catalyst was composed of a Pt phase, Pt3Sn alloy and very small SnO2 particles. Different electrochemical treatment enabled studies of PtSn/C having Sn both in surface and subsurface layers and skeleton structure of this catalyst with Sn only in subsurface layers. The results obtained revealed the promotional effect of surface Sn whether alloyed or as oxide above all in preventing accumulation of CO and blocking the surface Pt atoms. As a consequence, in formic acid oxidation, the currents are not entering the plateau but increasing constantly until reaching a maximum. It was concluded that at lower potentials the effect of Sn on formic acid oxidation was predominantly electronic but with increasing the potential bi-functional mechanism prevailed due to the leading role of SnO2. This role of SnO2 is restated in the present study. Therefore, CO and formic acid oxidation were examined at PtSnO2/C catalyst. The catalyst was synthesised by the same microwave-assisted polyol procedure. According to XRD analysis, the catalyst is composed of a Pt phase and SnO2 phase. The reactions were examined on PtSnO2/C catalyst treated on the same way as PtSn/C. Comparing the results obtained, the role of SnO2 is confirmed and at the same time the significance of alloyed Sn and its electronic effect is revealed.",
publisher = "Springer, New York",
journal = "Electrocatalysis",
title = "The Role of SnO2 on Electrocatalytic Activity of PtSn Catalysts",
volume = "9",
number = "1",
pages = "76-85",
doi = "10.1007/s12678-017-0424-4"
}

Tripković, D., Stevanović, S., Gavrilović, A., Rogan, J. R., Lačnjevac, U., Kravić, T.,& Jovanović, V. M.. (2018). The Role of SnO2 on Electrocatalytic Activity of PtSn Catalysts. in Electrocatalysis
Springer, New York., 9(1), 76-85.
https://doi.org/10.1007/s12678-017-0424-4

Tripković D, Stevanović S, Gavrilović A, Rogan JR, Lačnjevac U, Kravić T, Jovanović VM. The Role of SnO2 on Electrocatalytic Activity of PtSn Catalysts. in Electrocatalysis. 2018;9(1):76-85.
doi:10.1007/s12678-017-0424-4 .

Tripković, Dušan, Stevanović, Sanja, Gavrilović, Aleksandra, Rogan, Jelena R., Lačnjevac, Uroš, Kravić, Tamara, Jovanović, Vladislava M., "The Role of SnO2 on Electrocatalytic Activity of PtSn Catalysts" in Electrocatalysis, 9, no. 1 (2018):76-85,
https://doi.org/10.1007/s12678-017-0424-4 . .

TY  - JOUR
AU  - Krstajić Pajić, Mila N.
AU  - Stevanović, Sanja
AU  - Radmilović, Vuk V.
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Rogan, Jelena R.
AU  - Radmilović, Velimir R.
AU  - Jovanović, Vladislava M.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2282
AB  - PtAu systems are recognized as good catalysts for the oxidation of formic acid electrooxidation, which is investigated as a possible anodic reaction in low-temperature fuel cells. In this research, bimetallic PtAu nanoparticles, supported on high area carbon Vulcan XC-72R, were synthesized by water in oil microemulsion method. The precursor reduction process took place in a single microemulsion, simultaneously, in the presence of 35% of HCl in the water phase, as a capping agent. Electrochemical behavior of the PtAu/C catalyst was investigated at as prepared electrodes by cyclic voltammetry in 0.5M H2SO4 as a supporting electrolyte, and also in the oxidation of adsorbed CO. The results were compared to the Pt/C catalyst prepared by the same synthesis procedure. PtAu/C catalyst powder was also characterized by X-Ray Diffraction (XRD), High Resolution Transmission Electron Microscopy (HRTEM) and Energy Dispersive X-Ray Spectroscopy (EDS). Average particle diameter, of 2nm, was calculated from XRD data, which is close to the value of 2.82 nm obtained from TEM images. Compared to identically synthesized Pt nanoparticles, the bimetallic ones are significantly smaller. EDS maps of PtAu/C sample confirm the presence of both elements, and indicate a very fine distribution of Au in the sample. Elemental composition of about 20% Au and 80% Pt was also determined from these maps. Prepared catalyst was tested for formic acid electro-oxidation in terms of its activity and stability over the long term cycling. The voltammograms recorded indicate the change of reaction mechanism and better utilization of the catalyst surface in comparison to Pt/C.
AB  - PtAu sistemi se smatraju veoma dobrim katalizatorima za elektrooksidaciju mravlje kiseline, kao moguće anodne reakcije u niskotemperaturnim gorivnim galvanskim spregovima. U ovom radu bimetalne PtAu nanočestice sintetizovane su mikromulzionim postupkom, i u toku sinteze nanete na ugljenični nosač Vulcan XC-72R. Procesi redukcije prekursora odigravaju se simultano, unutar vodene faze iste mikroemulzije, u prisustvu 35% HCl. Elektrohemijske karakteristike katalizatora ispitivane su cikličnom voltametrijomv na 'as prepared' elektrodama u 0.5M H2SO4 kao osnovnom elektrolitu, kao i prilikom oksidacije adsorbovanog CO. Rezultati su upoređeni sa Pt/C katalizatorom sintetizovanim istim postupkom i pod istovetnim uslovima. Pripremljeni PtAu/C prah okarakterisan je takođe difrakcijom X-zraka, transmisionom elektronskom mikroskopijom i energetski disperzionom spektroskoijom. Veličina čestice određena analizom difraktograma X-zraka iznosi 2nm, što je blisko vrednosti dobijenoj analizom TEM snimaka od 2.82 nm. U poređenju sa Pt nanočesticama sintetizovanim na isti način, bimetalne nanočestice su znatno manjeg prečnika. Mape uzorka PtAu/C dobijene energetski disperzionom spektroskopijom potvrđuju prisustvo oba elementa i pokazuju veoma finu distribuciju Au u uzorku. Analizo mapa utvrđeno je i da je katalizator sastava 20% Au i 80% Pt. Konačno, ispitane su aktivnost i stabilnost bimetalnog katalizatora za oksidaciju mravlje kiseline. Snimljeni voltamogrami ukazuju na promenu reakcionog mehanizma i bolje iskorišćenje površine katalizatora u poređenju ra Pt/C katalizatorom sintetizovanim istim postupkom.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - PtAu catalyst with enhanced activity for formic acid oxidation
T1  - PtAu katalizator sa poboljšanom aktivnošću za reakciju oksidacije mravlje kiseline
VL  - 59
IS  - 2
SP  - 159
EP  - 166
DO  - 10.5937/ZasMat1802159K
ER  - 

@article{
author = "Krstajić Pajić, Mila N. and Stevanović, Sanja and Radmilović, Vuk V. and Gavrilović-Wohlmuther, Aleksandra and Rogan, Jelena R. and Radmilović, Velimir R. and Jovanović, Vladislava M.",
year = "2018",
abstract = "PtAu systems are recognized as good catalysts for the oxidation of formic acid electrooxidation, which is investigated as a possible anodic reaction in low-temperature fuel cells. In this research, bimetallic PtAu nanoparticles, supported on high area carbon Vulcan XC-72R, were synthesized by water in oil microemulsion method. The precursor reduction process took place in a single microemulsion, simultaneously, in the presence of 35% of HCl in the water phase, as a capping agent. Electrochemical behavior of the PtAu/C catalyst was investigated at as prepared electrodes by cyclic voltammetry in 0.5M H2SO4 as a supporting electrolyte, and also in the oxidation of adsorbed CO. The results were compared to the Pt/C catalyst prepared by the same synthesis procedure. PtAu/C catalyst powder was also characterized by X-Ray Diffraction (XRD), High Resolution Transmission Electron Microscopy (HRTEM) and Energy Dispersive X-Ray Spectroscopy (EDS). Average particle diameter, of 2nm, was calculated from XRD data, which is close to the value of 2.82 nm obtained from TEM images. Compared to identically synthesized Pt nanoparticles, the bimetallic ones are significantly smaller. EDS maps of PtAu/C sample confirm the presence of both elements, and indicate a very fine distribution of Au in the sample. Elemental composition of about 20% Au and 80% Pt was also determined from these maps. Prepared catalyst was tested for formic acid electro-oxidation in terms of its activity and stability over the long term cycling. The voltammograms recorded indicate the change of reaction mechanism and better utilization of the catalyst surface in comparison to Pt/C., PtAu sistemi se smatraju veoma dobrim katalizatorima za elektrooksidaciju mravlje kiseline, kao moguće anodne reakcije u niskotemperaturnim gorivnim galvanskim spregovima. U ovom radu bimetalne PtAu nanočestice sintetizovane su mikromulzionim postupkom, i u toku sinteze nanete na ugljenični nosač Vulcan XC-72R. Procesi redukcije prekursora odigravaju se simultano, unutar vodene faze iste mikroemulzije, u prisustvu 35% HCl. Elektrohemijske karakteristike katalizatora ispitivane su cikličnom voltametrijomv na 'as prepared' elektrodama u 0.5M H2SO4 kao osnovnom elektrolitu, kao i prilikom oksidacije adsorbovanog CO. Rezultati su upoređeni sa Pt/C katalizatorom sintetizovanim istim postupkom i pod istovetnim uslovima. Pripremljeni PtAu/C prah okarakterisan je takođe difrakcijom X-zraka, transmisionom elektronskom mikroskopijom i energetski disperzionom spektroskoijom. Veličina čestice određena analizom difraktograma X-zraka iznosi 2nm, što je blisko vrednosti dobijenoj analizom TEM snimaka od 2.82 nm. U poređenju sa Pt nanočesticama sintetizovanim na isti način, bimetalne nanočestice su znatno manjeg prečnika. Mape uzorka PtAu/C dobijene energetski disperzionom spektroskopijom potvrđuju prisustvo oba elementa i pokazuju veoma finu distribuciju Au u uzorku. Analizo mapa utvrđeno je i da je katalizator sastava 20% Au i 80% Pt. Konačno, ispitane su aktivnost i stabilnost bimetalnog katalizatora za oksidaciju mravlje kiseline. Snimljeni voltamogrami ukazuju na promenu reakcionog mehanizma i bolje iskorišćenje površine katalizatora u poređenju ra Pt/C katalizatorom sintetizovanim istim postupkom.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "PtAu catalyst with enhanced activity for formic acid oxidation, PtAu katalizator sa poboljšanom aktivnošću za reakciju oksidacije mravlje kiseline",
volume = "59",
number = "2",
pages = "159-166",
doi = "10.5937/ZasMat1802159K"
}

Krstajić Pajić, M. N., Stevanović, S., Radmilović, V. V., Gavrilović-Wohlmuther, A., Rogan, J. R., Radmilović, V. R.,& Jovanović, V. M.. (2018). PtAu catalyst with enhanced activity for formic acid oxidation. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 59(2), 159-166.
https://doi.org/10.5937/ZasMat1802159K

Krstajić Pajić MN, Stevanović S, Radmilović VV, Gavrilović-Wohlmuther A, Rogan JR, Radmilović VR, Jovanović VM. PtAu catalyst with enhanced activity for formic acid oxidation. in Zaštita materijala. 2018;59(2):159-166.
doi:10.5937/ZasMat1802159K .

Krstajić Pajić, Mila N., Stevanović, Sanja, Radmilović, Vuk V., Gavrilović-Wohlmuther, Aleksandra, Rogan, Jelena R., Radmilović, Velimir R., Jovanović, Vladislava M., "PtAu catalyst with enhanced activity for formic acid oxidation" in Zaštita materijala, 59, no. 2 (2018):159-166,
https://doi.org/10.5937/ZasMat1802159K . .

TY  - JOUR
AU  - Krstajić Pajić, Mila N.
AU  - Stevanović, Sanja
AU  - Radmilović, Vuk V.
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4294
AB  - In this research, a water-in-oil microemulsion method with HCl as a capping agent was applied to synthesize carbon supported Pt catalysts. Varying the concentration of HCl caused changes in the shape of obtained nanoparticles, i.e. preferential growth of certain facets. Addition of catalyst support in the synthesis process facilitated the cleaning procedures necessary to remove the surfactant residues. Prepared catalyst powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD analysis indicated the influence of HCl addition on the crystallite size and crystal habit. TEM revealed that addition of higher amounts of the capping agent led to the formation of a noticable amount of particles with concave cubic or branched-like structures. Influence of the catalyst particles shape on its electrochemical properties was tested in the oxidations of COads, ammonia and formic acid. The latter one was examined in terms of both activity and stability of as prepared and oxide-annealed (electrochemically treated) catalysts. The results clearly demonstrate that even small changes in the nanoparticle surface structure give rise to distinct modifications in their properties. Concave cubic particles, in comparison to other catalysts, show improved catalytic properties and the contribution of their preferentially oriented {100} facets is electrochemically detectable.
PB  - Elsevier
T2  - Applied Catalysis B-Environmental
T1  - Shape evolution of carbon supported Pt nanoparticles: From synthesis to application
VL  - 196
SP  - 174
EP  - 184
DO  - 10.1016/j.apcatb.2016.05.033
ER  - 

@article{
author = "Krstajić Pajić, Mila N. and Stevanović, Sanja and Radmilović, Vuk V. and Gavrilović-Wohlmuther, Aleksandra and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2016",
abstract = "In this research, a water-in-oil microemulsion method with HCl as a capping agent was applied to synthesize carbon supported Pt catalysts. Varying the concentration of HCl caused changes in the shape of obtained nanoparticles, i.e. preferential growth of certain facets. Addition of catalyst support in the synthesis process facilitated the cleaning procedures necessary to remove the surfactant residues. Prepared catalyst powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD analysis indicated the influence of HCl addition on the crystallite size and crystal habit. TEM revealed that addition of higher amounts of the capping agent led to the formation of a noticable amount of particles with concave cubic or branched-like structures. Influence of the catalyst particles shape on its electrochemical properties was tested in the oxidations of COads, ammonia and formic acid. The latter one was examined in terms of both activity and stability of as prepared and oxide-annealed (electrochemically treated) catalysts. The results clearly demonstrate that even small changes in the nanoparticle surface structure give rise to distinct modifications in their properties. Concave cubic particles, in comparison to other catalysts, show improved catalytic properties and the contribution of their preferentially oriented {100} facets is electrochemically detectable.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "Shape evolution of carbon supported Pt nanoparticles: From synthesis to application",
volume = "196",
pages = "174-184",
doi = "10.1016/j.apcatb.2016.05.033"
}

Krstajić Pajić, M. N., Stevanović, S., Radmilović, V. V., Gavrilović-Wohlmuther, A., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2016). Shape evolution of carbon supported Pt nanoparticles: From synthesis to application. in Applied Catalysis B-Environmental
Elsevier., 196, 174-184.
https://doi.org/10.1016/j.apcatb.2016.05.033

Krstajić Pajić MN, Stevanović S, Radmilović VV, Gavrilović-Wohlmuther A, Radmilović VR, Gojković SL, Jovanović VM. Shape evolution of carbon supported Pt nanoparticles: From synthesis to application. in Applied Catalysis B-Environmental. 2016;196:174-184.
doi:10.1016/j.apcatb.2016.05.033 .

Krstajić Pajić, Mila N., Stevanović, Sanja, Radmilović, Vuk V., Gavrilović-Wohlmuther, Aleksandra, Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Shape evolution of carbon supported Pt nanoparticles: From synthesis to application" in Applied Catalysis B-Environmental, 196 (2016):174-184,
https://doi.org/10.1016/j.apcatb.2016.05.033 . .

TY  - JOUR
AU  - Krstajić Pajić, Mila N.
AU  - Stevanović, Sanja
AU  - Radmilović, Vuk V.
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1855
AB  - In this research, a water-in-oil microemulsion method with HCl as a capping agent was applied to synthesize carbon supported Pt catalysts. Varying the concentration of HCl caused changes in the shape of obtained nanoparticles, i.e. preferential growth of certain facets. Addition of catalyst support in the synthesis process facilitated the cleaning procedures necessary to remove the surfactant residues. Prepared catalyst powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD analysis indicated the influence of HCl addition on the crystallite size and crystal habit. TEM revealed that addition of higher amounts of the capping agent led to the formation of a noticable amount of particles with concave cubic or branched-like structures. Influence of the catalyst particles shape on its electrochemical properties was tested in the oxidations of COads, ammonia and formic acid. The latter one was examined in terms of both activity and stability of as prepared and oxide-annealed (electrochemically treated) catalysts. The results clearly demonstrate that even small changes in the nanoparticle surface structure give rise to distinct modifications in their properties. Concave cubic particles, in comparison to other catalysts, show improved catalytic properties and the contribution of their preferentially oriented {100} facets is electrochemically detectable.
PB  - Elsevier
T2  - Applied Catalysis B-Environmental
T1  - Shape evolution of carbon supported Pt nanoparticles: From synthesis to application
VL  - 196
SP  - 174
EP  - 184
DO  - 10.1016/j.apcatb.2016.05.033
ER  - 

@article{
author = "Krstajić Pajić, Mila N. and Stevanović, Sanja and Radmilović, Vuk V. and Gavrilović-Wohlmuther, Aleksandra and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2016",
abstract = "In this research, a water-in-oil microemulsion method with HCl as a capping agent was applied to synthesize carbon supported Pt catalysts. Varying the concentration of HCl caused changes in the shape of obtained nanoparticles, i.e. preferential growth of certain facets. Addition of catalyst support in the synthesis process facilitated the cleaning procedures necessary to remove the surfactant residues. Prepared catalyst powders were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD analysis indicated the influence of HCl addition on the crystallite size and crystal habit. TEM revealed that addition of higher amounts of the capping agent led to the formation of a noticable amount of particles with concave cubic or branched-like structures. Influence of the catalyst particles shape on its electrochemical properties was tested in the oxidations of COads, ammonia and formic acid. The latter one was examined in terms of both activity and stability of as prepared and oxide-annealed (electrochemically treated) catalysts. The results clearly demonstrate that even small changes in the nanoparticle surface structure give rise to distinct modifications in their properties. Concave cubic particles, in comparison to other catalysts, show improved catalytic properties and the contribution of their preferentially oriented {100} facets is electrochemically detectable.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "Shape evolution of carbon supported Pt nanoparticles: From synthesis to application",
volume = "196",
pages = "174-184",
doi = "10.1016/j.apcatb.2016.05.033"
}

Krstajić Pajić, M. N., Stevanović, S., Radmilović, V. V., Gavrilović-Wohlmuther, A., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2016). Shape evolution of carbon supported Pt nanoparticles: From synthesis to application. in Applied Catalysis B-Environmental
Elsevier., 196, 174-184.
https://doi.org/10.1016/j.apcatb.2016.05.033

Krstajić Pajić MN, Stevanović S, Radmilović VV, Gavrilović-Wohlmuther A, Radmilović VR, Gojković SL, Jovanović VM. Shape evolution of carbon supported Pt nanoparticles: From synthesis to application. in Applied Catalysis B-Environmental. 2016;196:174-184.
doi:10.1016/j.apcatb.2016.05.033 .

Krstajić Pajić, Mila N., Stevanović, Sanja, Radmilović, Vuk V., Gavrilović-Wohlmuther, Aleksandra, Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Shape evolution of carbon supported Pt nanoparticles: From synthesis to application" in Applied Catalysis B-Environmental, 196 (2016):174-184,
https://doi.org/10.1016/j.apcatb.2016.05.033 . .

TY  - JOUR
AU  - Krstajić Pajić, Mila N.
AU  - Stevanović, Sanja
AU  - Radmilović, Vuk V.
AU  - Rogan, Jelena R.
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1986
AB  - Pt nanoparticles supported on Vulcan XC-72R were synthesized by water-in-oil microemulsion method. By incorporating different amounts of HCl as a capping agent in the precursor-containing water phase, nanoparticle shape was varied. Influencing the growth of certain facets leads to the changes of the particle shape depending on the preferential facets. As a result, nanoparticles exhibit some of the electrochemical features typical for single crystals. Commonly employed synthesis procedure for water-in-oil microemulsion method was altered with the addition of catalyst support in the system and changing the catalyst cleaning steps. Prepared catalysts were characterized by thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and electrochemical methods. Activity and stability for methanol oxidation reaction (MOR), a structure-sensitive reaction, were tested. Electrochemical results reveal the influence of particle size, shape and exposed facets on the electrochemical processes. TEM investigations confirm electrochemical findings, while TGA verifies Pt loading in catalyst powder. Based on the results, optimal HCl concentration for cubic particle formation is determined, and structural effect on MOR activity and stability was tested. Cuboidal NPs show very good reaction activity and fair stability under applied experimental conditions.
PB  - Springer, New York
T2  - Journal of Solid State Electrochemistry
T1  - Pt/C nanocatalysts for methanol electrooxidation prepared by water-in-oil microemulsion method
VL  - 20
IS  - 12
SP  - 3405
EP  - 3414
DO  - 10.1007/s10008-016-3319-z
ER  - 

@article{
author = "Krstajić Pajić, Mila N. and Stevanović, Sanja and Radmilović, Vuk V. and Rogan, Jelena R. and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2016",
abstract = "Pt nanoparticles supported on Vulcan XC-72R were synthesized by water-in-oil microemulsion method. By incorporating different amounts of HCl as a capping agent in the precursor-containing water phase, nanoparticle shape was varied. Influencing the growth of certain facets leads to the changes of the particle shape depending on the preferential facets. As a result, nanoparticles exhibit some of the electrochemical features typical for single crystals. Commonly employed synthesis procedure for water-in-oil microemulsion method was altered with the addition of catalyst support in the system and changing the catalyst cleaning steps. Prepared catalysts were characterized by thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and electrochemical methods. Activity and stability for methanol oxidation reaction (MOR), a structure-sensitive reaction, were tested. Electrochemical results reveal the influence of particle size, shape and exposed facets on the electrochemical processes. TEM investigations confirm electrochemical findings, while TGA verifies Pt loading in catalyst powder. Based on the results, optimal HCl concentration for cubic particle formation is determined, and structural effect on MOR activity and stability was tested. Cuboidal NPs show very good reaction activity and fair stability under applied experimental conditions.",
publisher = "Springer, New York",
journal = "Journal of Solid State Electrochemistry",
title = "Pt/C nanocatalysts for methanol electrooxidation prepared by water-in-oil microemulsion method",
volume = "20",
number = "12",
pages = "3405-3414",
doi = "10.1007/s10008-016-3319-z"
}

Krstajić Pajić, M. N., Stevanović, S., Radmilović, V. V., Rogan, J. R., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2016). Pt/C nanocatalysts for methanol electrooxidation prepared by water-in-oil microemulsion method. in Journal of Solid State Electrochemistry
Springer, New York., 20(12), 3405-3414.
https://doi.org/10.1007/s10008-016-3319-z

Krstajić Pajić MN, Stevanović S, Radmilović VV, Rogan JR, Radmilović VR, Gojković SL, Jovanović VM. Pt/C nanocatalysts for methanol electrooxidation prepared by water-in-oil microemulsion method. in Journal of Solid State Electrochemistry. 2016;20(12):3405-3414.
doi:10.1007/s10008-016-3319-z .

Krstajić Pajić, Mila N., Stevanović, Sanja, Radmilović, Vuk V., Rogan, Jelena R., Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Pt/C nanocatalysts for methanol electrooxidation prepared by water-in-oil microemulsion method" in Journal of Solid State Electrochemistry, 20, no. 12 (2016):3405-3414,
https://doi.org/10.1007/s10008-016-3319-z . .

TY  - JOUR
AU  - Stevanović, Sanja
AU  - Jovanović, Vladislava M.
AU  - Rogan, Jelena R.
AU  - Kowal, Andrzej
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1872
AB  - Carbon supported platinum catalysts for ethanol electrooxidation were synthesized by modified polyol synthesis method, assisted by microwave or reflux heating. Synthesized catalysts were characterized by XRD, STM and TGA techniques to determine their structural and morphological properties. STM and XRD investigations revealed small particle size (~3nm), while TGA showed Pt loading of 20% in both samples. Electrocatalytic activity of prepared catalysts was examined by potentiodynamic measurements and compared to commercial Pt catalyst (Pt/C-Tanaka). The highest activity for ethanol electrooxidation was observed with Pt catalyst prepared by microwave irradiation. The increase in activity can be assigned to the benefits of microwave assisted synthesis, such as small particle size and homogeneous particle distribution on the support.
AB  - Platinski katalizatori na ugljeničnoj podlozi su sintetizovani korišćenjem modifikovanog poliol postupka uz primenu mikrotalasnog ili refluks zagrevanja za reakciju elektrooksidacije etanola. Dobijeni katalizatori su karakterisani strukturno i morfološki korišćenjem XRD, STM i TGA tehnika. STM i XRD ispitivanja su pokazala malu veličinu čestica (~3nm), dok je TGA pokazala da je sadržaj metala u katalizatoru 20%. Elektrokatalitička aktivnost sintetizovanih katalizatora je ispitivana potenciodinamičkim merenjima i upoređena sa komercijalnim platinskim katalizatorom (Pt/C-Tanaka). Najbolju aktivnost za elektrooksidaciju etanola pokazao je platinski katalizator sintetizovan uz korišćenje mikrotalasnog zagrevanja. Veća aktivnost se može pripisati prednostima mikrotalasnog zagrevanja u toku sinteze jer je dobijen katalizator sa malom veličinom i homogenom di stribucijom čestica.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Influence of the synthesis procedures on pt catalyst activity for ethanol electrooxidation reaction
T1  - Uticaj postupka sinteze na aktivnost platinskih katalizatora za reakciju elektrooksidacije etanola
VL  - 57
IS  - 2
SP  - 339
EP  - 345
DO  - 10.5937/ZasMat1602339S
ER  - 

@article{
author = "Stevanović, Sanja and Jovanović, Vladislava M. and Rogan, Jelena R. and Kowal, Andrzej",
year = "2016",
abstract = "Carbon supported platinum catalysts for ethanol electrooxidation were synthesized by modified polyol synthesis method, assisted by microwave or reflux heating. Synthesized catalysts were characterized by XRD, STM and TGA techniques to determine their structural and morphological properties. STM and XRD investigations revealed small particle size (~3nm), while TGA showed Pt loading of 20% in both samples. Electrocatalytic activity of prepared catalysts was examined by potentiodynamic measurements and compared to commercial Pt catalyst (Pt/C-Tanaka). The highest activity for ethanol electrooxidation was observed with Pt catalyst prepared by microwave irradiation. The increase in activity can be assigned to the benefits of microwave assisted synthesis, such as small particle size and homogeneous particle distribution on the support., Platinski katalizatori na ugljeničnoj podlozi su sintetizovani korišćenjem modifikovanog poliol postupka uz primenu mikrotalasnog ili refluks zagrevanja za reakciju elektrooksidacije etanola. Dobijeni katalizatori su karakterisani strukturno i morfološki korišćenjem XRD, STM i TGA tehnika. STM i XRD ispitivanja su pokazala malu veličinu čestica (~3nm), dok je TGA pokazala da je sadržaj metala u katalizatoru 20%. Elektrokatalitička aktivnost sintetizovanih katalizatora je ispitivana potenciodinamičkim merenjima i upoređena sa komercijalnim platinskim katalizatorom (Pt/C-Tanaka). Najbolju aktivnost za elektrooksidaciju etanola pokazao je platinski katalizator sintetizovan uz korišćenje mikrotalasnog zagrevanja. Veća aktivnost se može pripisati prednostima mikrotalasnog zagrevanja u toku sinteze jer je dobijen katalizator sa malom veličinom i homogenom di stribucijom čestica.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Influence of the synthesis procedures on pt catalyst activity for ethanol electrooxidation reaction, Uticaj postupka sinteze na aktivnost platinskih katalizatora za reakciju elektrooksidacije etanola",
volume = "57",
number = "2",
pages = "339-345",
doi = "10.5937/ZasMat1602339S"
}

Stevanović, S., Jovanović, V. M., Rogan, J. R.,& Kowal, A.. (2016). Influence of the synthesis procedures on pt catalyst activity for ethanol electrooxidation reaction. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 57(2), 339-345.
https://doi.org/10.5937/ZasMat1602339S

Stevanović S, Jovanović VM, Rogan JR, Kowal A. Influence of the synthesis procedures on pt catalyst activity for ethanol electrooxidation reaction. in Zaštita materijala. 2016;57(2):339-345.
doi:10.5937/ZasMat1602339S .

Stevanović, Sanja, Jovanović, Vladislava M., Rogan, Jelena R., Kowal, Andrzej, "Influence of the synthesis procedures on pt catalyst activity for ethanol electrooxidation reaction" in Zaštita materijala, 57, no. 2 (2016):339-345,
https://doi.org/10.5937/ZasMat1602339S . .

TY  - CONF
AU  - Košević, Milica
AU  - Stevanović, Sanja
AU  - Šekularac, Gavrilo
AU  - Pavelkić, Vesna
AU  - Jovanović, Vladislava M.
AU  - Panić, Vladimir
PY  - 2015
UR  - http://www.aseee.eu/index.php/rse-see5-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3553
AB  - TiO2 was synthesized by forced hydrolysis process in order to be used as the support for Pt electrocatalyst (Pt/TiO2). Pt was deposited from Pt colloid solution synthesized by microwave-assisted polyol process. TiO2 powder (or C) was dispersed into H2O and 2 M H2SO4. The obtained suspension was stirred and Pt colloid was added afterwards. Upon filtration and rinsing with water, the obtained Pt/TiO2 (or Pt/C) catalyst was thermally treated at 160 C in N2 atmosphere. The catalyst water suspension for the preparation of 0.31 mg/cm2 thin layer electrode was loaded onto glassy carbon disk. Physical and chemical properties of the TiO2 and supported Pt catalyst were characterized by EDS, SEM, dynamic light scattering and XRD techniques. The influence of TiO2 thermal treatment on the electrochemical properties of Pt/TiO2 was also checked. Nominal Pt loading was 20 wt. %. EDS method revealed 18 wt. % loading of Pt on TiO2. The electrochemical properties of the Pt/TiO2 were examined by cyclic voltammetry in 0.1 M HClO4. The obtained results were compared with those obtained for carbon-supported Pt under the same conditions (Figure 1). The charge corresponding to the hydrogen desorption on Pt/TiO2 is lower than expected for 20 wt. % Pt. Although the voltammetric response is typical for Pt-based electrode material, the charge corresponds only to ~3 wt. % Pt. SEM images showed that TiO2 particles tend to form 3μm-sized agglomerates of ellipsoidal shape. The results indicate the possibility for platinum particles to be trapped inside TiO2 agglomerates. Even though calcination of TiO2 improved the Pt uptake from colloidal dispersion, it is still not as effective as commercial carbon support.
PB  - Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria
C3  - 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
T1  - Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt
SP  - 118
EP  - 118
UR  - https://hdl.handle.net/21.15107/rcub_cer_3553
ER  - 

@conference{
author = "Košević, Milica and Stevanović, Sanja and Šekularac, Gavrilo and Pavelkić, Vesna and Jovanović, Vladislava M. and Panić, Vladimir",
year = "2015",
abstract = "TiO2 was synthesized by forced hydrolysis process in order to be used as the support for Pt electrocatalyst (Pt/TiO2). Pt was deposited from Pt colloid solution synthesized by microwave-assisted polyol process. TiO2 powder (or C) was dispersed into H2O and 2 M H2SO4. The obtained suspension was stirred and Pt colloid was added afterwards. Upon filtration and rinsing with water, the obtained Pt/TiO2 (or Pt/C) catalyst was thermally treated at 160 C in N2 atmosphere. The catalyst water suspension for the preparation of 0.31 mg/cm2 thin layer electrode was loaded onto glassy carbon disk. Physical and chemical properties of the TiO2 and supported Pt catalyst were characterized by EDS, SEM, dynamic light scattering and XRD techniques. The influence of TiO2 thermal treatment on the electrochemical properties of Pt/TiO2 was also checked. Nominal Pt loading was 20 wt. %. EDS method revealed 18 wt. % loading of Pt on TiO2. The electrochemical properties of the Pt/TiO2 were examined by cyclic voltammetry in 0.1 M HClO4. The obtained results were compared with those obtained for carbon-supported Pt under the same conditions (Figure 1). The charge corresponding to the hydrogen desorption on Pt/TiO2 is lower than expected for 20 wt. % Pt. Although the voltammetric response is typical for Pt-based electrode material, the charge corresponds only to ~3 wt. % Pt. SEM images showed that TiO2 particles tend to form 3μm-sized agglomerates of ellipsoidal shape. The results indicate the possibility for platinum particles to be trapped inside TiO2 agglomerates. Even though calcination of TiO2 improved the Pt uptake from colloidal dispersion, it is still not as effective as commercial carbon support.",
publisher = "Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria",
journal = "5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts",
title = "Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt",
pages = "118-118",
url = "https://hdl.handle.net/21.15107/rcub_cer_3553"
}

Košević, M., Stevanović, S., Šekularac, G., Pavelkić, V., Jovanović, V. M.,& Panić, V.. (2015). Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria., 118-118.
https://hdl.handle.net/21.15107/rcub_cer_3553

Košević M, Stevanović S, Šekularac G, Pavelkić V, Jovanović VM, Panić V. Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2015;:118-118.
https://hdl.handle.net/21.15107/rcub_cer_3553 .

Košević, Milica, Stevanović, Sanja, Šekularac, Gavrilo, Pavelkić, Vesna, Jovanović, Vladislava M., Panić, Vladimir, "Controlled Colloidal Synthesis and Basic Electrochemical Properties of TiO2-Supported Pt" in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2015):118-118,
https://hdl.handle.net/21.15107/rcub_cer_3553 .

TY  - JOUR
AU  - Kaluđerović, Branka
AU  - Čokeša, Đuro
AU  - Dodevski, Vladimir
AU  - Krstić, Sanja
AU  - Jovanović, Vladislava M.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1687
AB  - Nanostructures of noble metals (Pt and Ag) on carbon support were prepared from fructose and solution of the Nobel metal salts (H2PtCl6 x 6H2O or AgNO3) under hydrothermal conditions. Commercial fructose (C6H12O6) acts as the carbon source and reducing agent and noble metal salts is a source of the metal to be incorporated in the new formed carbon material structure. The crystalline structure was examined by X-ray diffraction (XRD) and morphology investigated by scanning electron microscopy (SEM). The crystallite size of the deposited particles could be estimated by evaluating the line width of the Bragg peak applying the Scherrer method. All the XRD patterns clearly show the five main characteristic peaks of the face-centered cubic (fcc) crystalline for both Pt and Ag crystallite. The obtained Pt crystallite sizes were below 5.5 nm, while the Ag crystallite sizes were about 32 or 34nm.
AB  - Nanostrukture plemenitih metala (Pt i Ag) na ugljeničnom materijalu, kao nosaču, su napravljene, polazeći od fruktoze i rastvora soli plemenitih metala (H2PtCl6 x 6H2O ili AgNO3) pri hidrotermalnim uslovima. Komercijalna fruktoza (C6H12O6) deluje kao izvor ugljenika i redukujući agens, a soli plemenitih metala, kao izvor metala, koji treba da se inkorporira u novonastalu strukturu ugljeničnog materijala. Kristalita struktura je ispitivana pomoću difrakcije X-zraka (XRD) a morfologija je ispitivana pomoću skanirajuće elektronske mikroskopije (SEM). Veličina kristalita deponovanih čestica se računa iz širine linije Bragg-ovog pika koristeći Scherrer-ov metod. Svi XRD uzorci jasno pokazuju pet karakterističnih pikova površinski centrirane kristalne rešetke (fcc) i za kristalite Pt i za kristalite Ag. Dobijeni kristaliti Pt imaju veličinu manju od 5.5 nm, dok su veličine kristalita Ag oko 32 i 34nm.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Direct synthesis of noble metal nanostructures on carbon support by hydrothermal process
T1  - Direktna sinteza nanostrukturnog plemenitog metala na ugljeničnoj osnovi pomoću hidrotermalnog procesa
VL  - 56
IS  - 4
SP  - 409
EP  - 412
DO  - 10.5937/ZasMat1504409K
ER  - 

@article{
author = "Kaluđerović, Branka and Čokeša, Đuro and Dodevski, Vladimir and Krstić, Sanja and Jovanović, Vladislava M.",
year = "2015",
abstract = "Nanostructures of noble metals (Pt and Ag) on carbon support were prepared from fructose and solution of the Nobel metal salts (H2PtCl6 x 6H2O or AgNO3) under hydrothermal conditions. Commercial fructose (C6H12O6) acts as the carbon source and reducing agent and noble metal salts is a source of the metal to be incorporated in the new formed carbon material structure. The crystalline structure was examined by X-ray diffraction (XRD) and morphology investigated by scanning electron microscopy (SEM). The crystallite size of the deposited particles could be estimated by evaluating the line width of the Bragg peak applying the Scherrer method. All the XRD patterns clearly show the five main characteristic peaks of the face-centered cubic (fcc) crystalline for both Pt and Ag crystallite. The obtained Pt crystallite sizes were below 5.5 nm, while the Ag crystallite sizes were about 32 or 34nm., Nanostrukture plemenitih metala (Pt i Ag) na ugljeničnom materijalu, kao nosaču, su napravljene, polazeći od fruktoze i rastvora soli plemenitih metala (H2PtCl6 x 6H2O ili AgNO3) pri hidrotermalnim uslovima. Komercijalna fruktoza (C6H12O6) deluje kao izvor ugljenika i redukujući agens, a soli plemenitih metala, kao izvor metala, koji treba da se inkorporira u novonastalu strukturu ugljeničnog materijala. Kristalita struktura je ispitivana pomoću difrakcije X-zraka (XRD) a morfologija je ispitivana pomoću skanirajuće elektronske mikroskopije (SEM). Veličina kristalita deponovanih čestica se računa iz širine linije Bragg-ovog pika koristeći Scherrer-ov metod. Svi XRD uzorci jasno pokazuju pet karakterističnih pikova površinski centrirane kristalne rešetke (fcc) i za kristalite Pt i za kristalite Ag. Dobijeni kristaliti Pt imaju veličinu manju od 5.5 nm, dok su veličine kristalita Ag oko 32 i 34nm.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Direct synthesis of noble metal nanostructures on carbon support by hydrothermal process, Direktna sinteza nanostrukturnog plemenitog metala na ugljeničnoj osnovi pomoću hidrotermalnog procesa",
volume = "56",
number = "4",
pages = "409-412",
doi = "10.5937/ZasMat1504409K"
}

Kaluđerović, B., Čokeša, Đ., Dodevski, V., Krstić, S.,& Jovanović, V. M.. (2015). Direct synthesis of noble metal nanostructures on carbon support by hydrothermal process. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 56(4), 409-412.
https://doi.org/10.5937/ZasMat1504409K

Kaluđerović B, Čokeša Đ, Dodevski V, Krstić S, Jovanović VM. Direct synthesis of noble metal nanostructures on carbon support by hydrothermal process. in Zaštita materijala. 2015;56(4):409-412.
doi:10.5937/ZasMat1504409K .

Kaluđerović, Branka, Čokeša, Đuro, Dodevski, Vladimir, Krstić, Sanja, Jovanović, Vladislava M., "Direct synthesis of noble metal nanostructures on carbon support by hydrothermal process" in Zaštita materijala, 56, no. 4 (2015):409-412,
https://doi.org/10.5937/ZasMat1504409K . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Tripković, Amalija
AU  - Stevanović, Rade M.
AU  - Jovanović, Vladislava M.
AU  - Popović, Ksenija
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1620
AB  - Formic acid oxidation was examined on platinum-bismuth deposits on glassy carbon substrate prepared by two-step process, i.e., electrochemical deposition of Bi followed by electrochemical deposition of Pt as described in our previous article (J Electrochem Soc 161:H547-H554, 2014). Upon treatment of as-prepared clusters by slow anodic sweep, bimetallic structure consisting of Bi core occluded by Pt and Bi-oxide was obtained and exhibited significant activity and exceptional stability in HCOOH oxidation. In order to explain such electrocatalytic stability, in this work, the electrochemical properties of Pt"Bi/GC catalyst were investigated applying same protocols in supporting electrolyte with or without HCOOH and compared with Pt/GC. The protocols comprised potentiodynamic, quasi-steady-state, and chronoamperometric measurements combined with the surface characterization by COads stripping voltammetry. Application of potential cycling at Pt"Bi/GC electrode in supporting electrolyte containing HCOOH leads to minor change in surface morphology, mildly leaching of Bi from the electrode surface, and negligible decrease in activity. On the other hand, significant Bi dissolution and considerable decrease in activity are the effects of the same treatment without HCOOH. Contrary to Pt"Bi/GC, Pt/GC electrodes subjected to the same protocols exhibit completely opposite properties being more stabile during potential cycling without HCOOH than in the presence of this acid. Exceptional stability in formic acid oxidation of Pt"Bi/GC catalyst is thus most probably the result of the combination of predominant dehydrogenation path of the reaction, suppressed Bi leaching, and compensation of dissolved Bi from the core as its source due to which surface morphology endured minor changes.
PB  - Springer, New York
T2  - Journal of Solid State Electrochemistry
T1  - Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation
VL  - 19
IS  - 8
SP  - 2223
EP  - 2233
DO  - 10.1007/s10008-015-2841-8
ER  - 

@article{
author = "Lović, Jelena and Stevanović, Sanja and Tripković, Dušan and Tripković, Amalija and Stevanović, Rade M. and Jovanović, Vladislava M. and Popović, Ksenija",
year = "2015",
abstract = "Formic acid oxidation was examined on platinum-bismuth deposits on glassy carbon substrate prepared by two-step process, i.e., electrochemical deposition of Bi followed by electrochemical deposition of Pt as described in our previous article (J Electrochem Soc 161:H547-H554, 2014). Upon treatment of as-prepared clusters by slow anodic sweep, bimetallic structure consisting of Bi core occluded by Pt and Bi-oxide was obtained and exhibited significant activity and exceptional stability in HCOOH oxidation. In order to explain such electrocatalytic stability, in this work, the electrochemical properties of Pt"Bi/GC catalyst were investigated applying same protocols in supporting electrolyte with or without HCOOH and compared with Pt/GC. The protocols comprised potentiodynamic, quasi-steady-state, and chronoamperometric measurements combined with the surface characterization by COads stripping voltammetry. Application of potential cycling at Pt"Bi/GC electrode in supporting electrolyte containing HCOOH leads to minor change in surface morphology, mildly leaching of Bi from the electrode surface, and negligible decrease in activity. On the other hand, significant Bi dissolution and considerable decrease in activity are the effects of the same treatment without HCOOH. Contrary to Pt"Bi/GC, Pt/GC electrodes subjected to the same protocols exhibit completely opposite properties being more stabile during potential cycling without HCOOH than in the presence of this acid. Exceptional stability in formic acid oxidation of Pt"Bi/GC catalyst is thus most probably the result of the combination of predominant dehydrogenation path of the reaction, suppressed Bi leaching, and compensation of dissolved Bi from the core as its source due to which surface morphology endured minor changes.",
publisher = "Springer, New York",
journal = "Journal of Solid State Electrochemistry",
title = "Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation",
volume = "19",
number = "8",
pages = "2223-2233",
doi = "10.1007/s10008-015-2841-8"
}

Lović, J., Stevanović, S., Tripković, D., Tripković, A., Stevanović, R. M., Jovanović, V. M.,& Popović, K.. (2015). Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation. in Journal of Solid State Electrochemistry
Springer, New York., 19(8), 2223-2233.
https://doi.org/10.1007/s10008-015-2841-8

Lović J, Stevanović S, Tripković D, Tripković A, Stevanović RM, Jovanović VM, Popović K. Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation. in Journal of Solid State Electrochemistry. 2015;19(8):2223-2233.
doi:10.1007/s10008-015-2841-8 .

Lović, Jelena, Stevanović, Sanja, Tripković, Dušan, Tripković, Amalija, Stevanović, Rade M., Jovanović, Vladislava M., Popović, Ksenija, "Insight into electrocatalytic stability of low loading Pt-Bi/GC and Pt/GC clusters in formic acid oxidation" in Journal of Solid State Electrochemistry, 19, no. 8 (2015):2223-2233,
https://doi.org/10.1007/s10008-015-2841-8 . .

TY  - CONF
AU  - Krstajić, Mila
AU  - Stevanović, Sanja
AU  - Radmilović, Vuk V.
AU  - Rogan, Jelena R.
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2015
UR  - http://www.aseee.eu/index.php/rse-see5-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3556
AB  - Electrocatalytic activity of platinum-based electrocatalysts used in fuel cells has been well recognized. However, significant attention remains on the particle shape and size control of such nanomaterials. Catalytic activity can be enhanced by alloying Pt with another element (e.g. Ru and Sn), or by supporting Pt on metal oxides, both of which involve a bifunctional effect. It is also possible to achieve better catalytic characteristics by exposing different Pt crystal facets, which alters chemical and electronic interactions (structural effect). In order to synthesize Pt nanoparticles of a pre-determined shape, water in oil microemulsion method was used, with a few modifications: carbon support (Vulcan XC-72R) was added into the microemulsion itself, just after the completion of the reduction reaction of H2PtCl6 with NaBH4 as the reducing agent and this was crucial for further improvements of the catalyst cleaning procedures. Microemulsion consisted of [n-heptane] / [polyethileneglycoldodecyether (BRIJ30)] / [0,1M H2PtCl6 in 0, 15, 25 and 35% HCl], so four Pt catalyst were formed using different amounts of HCl in the water phase of the microemulsion. In comparison to previously reported applications of the microemulsion method, where electrochemical treatment of catalysts before its application was necessary, this alteration of cleaning steps made use of the “as prepared” catalysts possible. Catalysts A (0% HCl), B (15% HCl), C (25% HCl) and D (35% HCl) were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD) and transmission electron microscopy (TEM), as well as with electrochemical characterization methods (cyclic voltammetry in supporting electrolyte, CO stripping). TEM images confirmed the presence of cubic Pt particles, and indicated their good dispersion on carbon support, while XRD patterns revealed the share of each plane orientation in all investigated catalysts. This acknowledged the influence of HCl in the microemulsion on the shape of Pt particles. Mean particle size was determined both by TEM and XRD investigations, which are in good accordance, and show that average diameters of these four catalysts vary from 3 to 8 nm.
PB  - Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria
C3  - 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
T1  - Shape Controlled, Carbon Supported Pt Anodic Catalysts for DFAFC
SP  - 78
EP  - 78
UR  - https://hdl.handle.net/21.15107/rcub_cer_3556
ER  - 

@conference{
author = "Krstajić, Mila and Stevanović, Sanja and Radmilović, Vuk V. and Rogan, Jelena R. and Gavrilović-Wohlmuther, Aleksandra and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2015",
abstract = "Electrocatalytic activity of platinum-based electrocatalysts used in fuel cells has been well recognized. However, significant attention remains on the particle shape and size control of such nanomaterials. Catalytic activity can be enhanced by alloying Pt with another element (e.g. Ru and Sn), or by supporting Pt on metal oxides, both of which involve a bifunctional effect. It is also possible to achieve better catalytic characteristics by exposing different Pt crystal facets, which alters chemical and electronic interactions (structural effect). In order to synthesize Pt nanoparticles of a pre-determined shape, water in oil microemulsion method was used, with a few modifications: carbon support (Vulcan XC-72R) was added into the microemulsion itself, just after the completion of the reduction reaction of H2PtCl6 with NaBH4 as the reducing agent and this was crucial for further improvements of the catalyst cleaning procedures. Microemulsion consisted of [n-heptane] / [polyethileneglycoldodecyether (BRIJ30)] / [0,1M H2PtCl6 in 0, 15, 25 and 35% HCl], so four Pt catalyst were formed using different amounts of HCl in the water phase of the microemulsion. In comparison to previously reported applications of the microemulsion method, where electrochemical treatment of catalysts before its application was necessary, this alteration of cleaning steps made use of the “as prepared” catalysts possible. Catalysts A (0% HCl), B (15% HCl), C (25% HCl) and D (35% HCl) were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD) and transmission electron microscopy (TEM), as well as with electrochemical characterization methods (cyclic voltammetry in supporting electrolyte, CO stripping). TEM images confirmed the presence of cubic Pt particles, and indicated their good dispersion on carbon support, while XRD patterns revealed the share of each plane orientation in all investigated catalysts. This acknowledged the influence of HCl in the microemulsion on the shape of Pt particles. Mean particle size was determined both by TEM and XRD investigations, which are in good accordance, and show that average diameters of these four catalysts vary from 3 to 8 nm.",
publisher = "Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria",
journal = "5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts",
title = "Shape Controlled, Carbon Supported Pt Anodic Catalysts for DFAFC",
pages = "78-78",
url = "https://hdl.handle.net/21.15107/rcub_cer_3556"
}

Krstajić, M., Stevanović, S., Radmilović, V. V., Rogan, J. R., Gavrilović-Wohlmuther, A., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2015). Shape Controlled, Carbon Supported Pt Anodic Catalysts for DFAFC. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria., 78-78.
https://hdl.handle.net/21.15107/rcub_cer_3556

Krstajić M, Stevanović S, Radmilović VV, Rogan JR, Gavrilović-Wohlmuther A, Radmilović VR, Gojković SL, Jovanović VM. Shape Controlled, Carbon Supported Pt Anodic Catalysts for DFAFC. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2015;:78-78.
https://hdl.handle.net/21.15107/rcub_cer_3556 .

Krstajić, Mila, Stevanović, Sanja, Radmilović, Vuk V., Rogan, Jelena R., Gavrilović-Wohlmuther, Aleksandra, Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Shape Controlled, Carbon Supported Pt Anodic Catalysts for DFAFC" in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2015):78-78,
https://hdl.handle.net/21.15107/rcub_cer_3556 .

TY  - JOUR
AU  - Krstajić, Mila N.
AU  - Stevanović, Sanja
AU  - Rogan, Jelena R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1638
AB  - Pt-based nanocatalysts supported on Vulcan XC-72R carbon, were prepared by water-in-oil microemulsion method, with addition of various amounts of HCl in the water phase. Polyethileneglycoldodecylether (BRIJ 30) was used as a surfactant, which influenced the Pt surface structure, along with HCl. Catalysts prepared with addition of 0, 15, 25 and 35 % of HCl during the synthesis, were electrochemically characterised in 0,5 M H2SO4 using cyclic voltammetry and CO oxidation. Formic acid electrooxidation was examined on all investigated catalysts, in terms of their electrocatalytic activity and stability. Platinum loading on carbon support was examined by Thermogravimetric analysis. Catalysts showed different features in hydrogen region, and slight differences in formic acid oxidation mechanisms.
AB  - Platinski nano-katalizatori na ugljeničnom nosaču Vulcan XC-72R sintetizovani su mikroemulzionom metodom, sa različitim sadržajem HCl u vodenoj fazi mikroemulzije. Kao surfaktant korišćen je polietilenglikol-dodeciletar (BRIJ30), čija je uloga da, zajedno sa HCl, utiče na strukturu površine platine. Katalizatori, koji su pripremljeni sa 0, 15, 25 i 35 % HCl u vodenoj fazi, okarakterisani su elektrohemijski u 0,5 M H2SO4, cikličnom voltametrijom i oksidacijom CO. Aktivnost i stabilnost sva četiri katalizatora ispitana je za oksidaciju mravlje kiseline. Udeo platine u prahu pripremljenih katalizatora određen je termogravimetrijskom analizom. Katalizatori su pokazali različito ponašanje u vodoničnoj oblasti osnovnih voltamograma, kao i različitu aktivnost i stabilnost za oksidaciju mravlje kiseline.
PB  - Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Formic acid electrooxidation on carbon supported platinum catalyst with preferential plane orientation
T1  - Oksidacija mravlje kiseline na platinskim katalizatorima na ugljeničnom nosaču sa preferencijalno orijentisanim ravnima
VL  - 70
IS  - 2
SP  - 203
EP  - 208
DO  - 10.5937/tehnika1502203K
ER  - 

@article{
author = "Krstajić, Mila N. and Stevanović, Sanja and Rogan, Jelena R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2015",
abstract = "Pt-based nanocatalysts supported on Vulcan XC-72R carbon, were prepared by water-in-oil microemulsion method, with addition of various amounts of HCl in the water phase. Polyethileneglycoldodecylether (BRIJ 30) was used as a surfactant, which influenced the Pt surface structure, along with HCl. Catalysts prepared with addition of 0, 15, 25 and 35 % of HCl during the synthesis, were electrochemically characterised in 0,5 M H2SO4 using cyclic voltammetry and CO oxidation. Formic acid electrooxidation was examined on all investigated catalysts, in terms of their electrocatalytic activity and stability. Platinum loading on carbon support was examined by Thermogravimetric analysis. Catalysts showed different features in hydrogen region, and slight differences in formic acid oxidation mechanisms., Platinski nano-katalizatori na ugljeničnom nosaču Vulcan XC-72R sintetizovani su mikroemulzionom metodom, sa različitim sadržajem HCl u vodenoj fazi mikroemulzije. Kao surfaktant korišćen je polietilenglikol-dodeciletar (BRIJ30), čija je uloga da, zajedno sa HCl, utiče na strukturu površine platine. Katalizatori, koji su pripremljeni sa 0, 15, 25 i 35 % HCl u vodenoj fazi, okarakterisani su elektrohemijski u 0,5 M H2SO4, cikličnom voltametrijom i oksidacijom CO. Aktivnost i stabilnost sva četiri katalizatora ispitana je za oksidaciju mravlje kiseline. Udeo platine u prahu pripremljenih katalizatora određen je termogravimetrijskom analizom. Katalizatori su pokazali različito ponašanje u vodoničnoj oblasti osnovnih voltamograma, kao i različitu aktivnost i stabilnost za oksidaciju mravlje kiseline.",
publisher = "Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Formic acid electrooxidation on carbon supported platinum catalyst with preferential plane orientation, Oksidacija mravlje kiseline na platinskim katalizatorima na ugljeničnom nosaču sa preferencijalno orijentisanim ravnima",
volume = "70",
number = "2",
pages = "203-208",
doi = "10.5937/tehnika1502203K"
}

Krstajić, M. N., Stevanović, S., Rogan, J. R., Gojković, S. Lj.,& Jovanović, V. M.. (2015). Formic acid electrooxidation on carbon supported platinum catalyst with preferential plane orientation. in Tehnika
Savez inženjera i tehničara Srbije., 70(2), 203-208.
https://doi.org/10.5937/tehnika1502203K

Krstajić MN, Stevanović S, Rogan JR, Gojković SL, Jovanović VM. Formic acid electrooxidation on carbon supported platinum catalyst with preferential plane orientation. in Tehnika. 2015;70(2):203-208.
doi:10.5937/tehnika1502203K .

Krstajić, Mila N., Stevanović, Sanja, Rogan, Jelena R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Formic acid electrooxidation on carbon supported platinum catalyst with preferential plane orientation" in Tehnika, 70, no. 2 (2015):203-208,
https://doi.org/10.5937/tehnika1502203K . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Jovanović, Vladislava M.
AU  - Stevanović, Rade M.
AU  - Tripković, Amalija
AU  - Popović, Ksenija
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1473
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3161
AB  - Formic acid oxidation was studied on platinum-coated bismuth deposits on glassy carbon substrate. The catalyst was prepared by a two-step process using chronocoulometry, i.e. controlled amount of Bi was electrodeposited onto glassy carbon followed by electrodeposition of Pt layer. The amount of Pt was constant while the amount of Bi vary to correspond the molar ratio of Pt:Bi = 1:0.1 or 1:1 or 1:10. AFM characterization of the electrode surface indicates that Pt is deposited preferentially on previously formed Bi particles, but cyclic voltammetry revealed Bi leaching meaning that Bi was not completely occluded by Pt. In order to obtain stable electrode surface, deposits were subjected to potential cycling up to 1.2 V vs. SCE in supporting electrolyte, prior to use as catalysts for formic acid oxidation. On this way the electrodes composed of Bi core occluded by Pt and Bi-oxide surface layers were obtained. The Pt(Bi)/GC electrodes exhibit enhanced electrocatalytic activity in comparison to Pt/GC for formic acid oxidation which depends on composition and surface morphology. High currents and onset potential shifted to negative values indicate a significant increase in direct path what is explained through ensemble effect induced by Bi-oxide species interrupting Pt domains. Electronic modification of Pt both by surface and sub-surface Bi can play some role as well. Significantly prolonged potential cycling in supporting electrolyte of previously stabilized Pt(Bi)/GC electrodes by Bi oxide, led to considerably lower Bi leaching accompanied by dissolution and redeposition of Pt and the outcome of this treatment was Pt shell over Bi core. These Pt"Bi/GC catalysts also exhibit higher activity for HCOOH oxidation in comparison to Pt/GC depending on the quantity of Bi remained under Pt shell, but in this case the improvement is induced solely by electronic effect of under-laying Bi.
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation
VL  - 735
SP  - 1
EP  - 9
DO  - 10.1016/j.jelechem.2014.09.036
ER  - 

@article{
author = "Lović, Jelena and Stevanović, Sanja and Tripković, Dušan and Jovanović, Vladislava M. and Stevanović, Rade M. and Tripković, Amalija and Popović, Ksenija",
year = "2014",
abstract = "Formic acid oxidation was studied on platinum-coated bismuth deposits on glassy carbon substrate. The catalyst was prepared by a two-step process using chronocoulometry, i.e. controlled amount of Bi was electrodeposited onto glassy carbon followed by electrodeposition of Pt layer. The amount of Pt was constant while the amount of Bi vary to correspond the molar ratio of Pt:Bi = 1:0.1 or 1:1 or 1:10. AFM characterization of the electrode surface indicates that Pt is deposited preferentially on previously formed Bi particles, but cyclic voltammetry revealed Bi leaching meaning that Bi was not completely occluded by Pt. In order to obtain stable electrode surface, deposits were subjected to potential cycling up to 1.2 V vs. SCE in supporting electrolyte, prior to use as catalysts for formic acid oxidation. On this way the electrodes composed of Bi core occluded by Pt and Bi-oxide surface layers were obtained. The Pt(Bi)/GC electrodes exhibit enhanced electrocatalytic activity in comparison to Pt/GC for formic acid oxidation which depends on composition and surface morphology. High currents and onset potential shifted to negative values indicate a significant increase in direct path what is explained through ensemble effect induced by Bi-oxide species interrupting Pt domains. Electronic modification of Pt both by surface and sub-surface Bi can play some role as well. Significantly prolonged potential cycling in supporting electrolyte of previously stabilized Pt(Bi)/GC electrodes by Bi oxide, led to considerably lower Bi leaching accompanied by dissolution and redeposition of Pt and the outcome of this treatment was Pt shell over Bi core. These Pt"Bi/GC catalysts also exhibit higher activity for HCOOH oxidation in comparison to Pt/GC depending on the quantity of Bi remained under Pt shell, but in this case the improvement is induced solely by electronic effect of under-laying Bi.",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation",
volume = "735",
pages = "1-9",
doi = "10.1016/j.jelechem.2014.09.036"
}

Lović, J., Stevanović, S., Tripković, D., Jovanović, V. M., Stevanović, R. M., Tripković, A.,& Popović, K.. (2014). Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation. in Journal of Electroanalytical Chemistry
Elsevier., 735, 1-9.
https://doi.org/10.1016/j.jelechem.2014.09.036

Lović J, Stevanović S, Tripković D, Jovanović VM, Stevanović RM, Tripković A, Popović K. Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation. in Journal of Electroanalytical Chemistry. 2014;735:1-9.
doi:10.1016/j.jelechem.2014.09.036 .

Lović, Jelena, Stevanović, Sanja, Tripković, Dušan, Jovanović, Vladislava M., Stevanović, Rade M., Tripković, Amalija, Popović, Ksenija, "Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation" in Journal of Electroanalytical Chemistry, 735 (2014):1-9,
https://doi.org/10.1016/j.jelechem.2014.09.036 . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Jovanović, Vladislava M.
AU  - Stevanović, Rade M.
AU  - Tripković, Amalija
AU  - Popović, Ksenija
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1473
AB  - Formic acid oxidation was studied on platinum-coated bismuth deposits on glassy carbon substrate. The catalyst was prepared by a two-step process using chronocoulometry, i.e. controlled amount of Bi was electrodeposited onto glassy carbon followed by electrodeposition of Pt layer. The amount of Pt was constant while the amount of Bi vary to correspond the molar ratio of Pt:Bi = 1:0.1 or 1:1 or 1:10. AFM characterization of the electrode surface indicates that Pt is deposited preferentially on previously formed Bi particles, but cyclic voltammetry revealed Bi leaching meaning that Bi was not completely occluded by Pt. In order to obtain stable electrode surface, deposits were subjected to potential cycling up to 1.2 V vs. SCE in supporting electrolyte, prior to use as catalysts for formic acid oxidation. On this way the electrodes composed of Bi core occluded by Pt and Bi-oxide surface layers were obtained. The Pt(Bi)/GC electrodes exhibit enhanced electrocatalytic activity in comparison to Pt/GC for formic acid oxidation which depends on composition and surface morphology. High currents and onset potential shifted to negative values indicate a significant increase in direct path what is explained through ensemble effect induced by Bi-oxide species interrupting Pt domains. Electronic modification of Pt both by surface and sub-surface Bi can play some role as well. Significantly prolonged potential cycling in supporting electrolyte of previously stabilized Pt(Bi)/GC electrodes by Bi oxide, led to considerably lower Bi leaching accompanied by dissolution and redeposition of Pt and the outcome of this treatment was Pt shell over Bi core. These Pt"Bi/GC catalysts also exhibit higher activity for HCOOH oxidation in comparison to Pt/GC depending on the quantity of Bi remained under Pt shell, but in this case the improvement is induced solely by electronic effect of under-laying Bi.
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation
VL  - 735
SP  - 1
EP  - 9
DO  - 10.1016/j.jelechem.2014.09.036
ER  - 

@article{
author = "Lović, Jelena and Stevanović, Sanja and Tripković, Dušan and Jovanović, Vladislava M. and Stevanović, Rade M. and Tripković, Amalija and Popović, Ksenija",
year = "2014",
abstract = "Formic acid oxidation was studied on platinum-coated bismuth deposits on glassy carbon substrate. The catalyst was prepared by a two-step process using chronocoulometry, i.e. controlled amount of Bi was electrodeposited onto glassy carbon followed by electrodeposition of Pt layer. The amount of Pt was constant while the amount of Bi vary to correspond the molar ratio of Pt:Bi = 1:0.1 or 1:1 or 1:10. AFM characterization of the electrode surface indicates that Pt is deposited preferentially on previously formed Bi particles, but cyclic voltammetry revealed Bi leaching meaning that Bi was not completely occluded by Pt. In order to obtain stable electrode surface, deposits were subjected to potential cycling up to 1.2 V vs. SCE in supporting electrolyte, prior to use as catalysts for formic acid oxidation. On this way the electrodes composed of Bi core occluded by Pt and Bi-oxide surface layers were obtained. The Pt(Bi)/GC electrodes exhibit enhanced electrocatalytic activity in comparison to Pt/GC for formic acid oxidation which depends on composition and surface morphology. High currents and onset potential shifted to negative values indicate a significant increase in direct path what is explained through ensemble effect induced by Bi-oxide species interrupting Pt domains. Electronic modification of Pt both by surface and sub-surface Bi can play some role as well. Significantly prolonged potential cycling in supporting electrolyte of previously stabilized Pt(Bi)/GC electrodes by Bi oxide, led to considerably lower Bi leaching accompanied by dissolution and redeposition of Pt and the outcome of this treatment was Pt shell over Bi core. These Pt"Bi/GC catalysts also exhibit higher activity for HCOOH oxidation in comparison to Pt/GC depending on the quantity of Bi remained under Pt shell, but in this case the improvement is induced solely by electronic effect of under-laying Bi.",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation",
volume = "735",
pages = "1-9",
doi = "10.1016/j.jelechem.2014.09.036"
}

Lović, J., Stevanović, S., Tripković, D., Jovanović, V. M., Stevanović, R. M., Tripković, A.,& Popović, K.. (2014). Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation. in Journal of Electroanalytical Chemistry
Elsevier., 735, 1-9.
https://doi.org/10.1016/j.jelechem.2014.09.036

Lović J, Stevanović S, Tripković D, Jovanović VM, Stevanović RM, Tripković A, Popović K. Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation. in Journal of Electroanalytical Chemistry. 2014;735:1-9.
doi:10.1016/j.jelechem.2014.09.036 .

Lović, Jelena, Stevanović, Sanja, Tripković, Dušan, Jovanović, Vladislava M., Stevanović, Rade M., Tripković, Amalija, Popović, Ksenija, "Catalytic activities of Pt thin films electrodeposited onto Bi coated glassy carbon substrate toward formic acid electrooxidation" in Journal of Electroanalytical Chemistry, 735 (2014):1-9,
https://doi.org/10.1016/j.jelechem.2014.09.036 . .

TY  - JOUR
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Tripković, Vladimir
AU  - Minić, Dragica M.
AU  - Gavrilović, Aleksandra
AU  - Tripković, Amalija
AU  - Jovanović, Vladislava M.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1526
AB  - The role of Sn on the catalytic activity for CO and formic acid oxidation is studied by comparing the activities of differently treated PtSn/C and Pt/C catalysts. The catalysts are prepared by a microwave-assisted polyol synthesis method. As revealed by scanning tunneling and transmission electron microscopic (STM and TEM) characterization, the outcomes of the synthesis procedure for both Pt and PtSn are small particles, similar to 1.5 nm in diameter. Upon deposition on the carbon support, the particle size increases to similar to 2.5 nm due to sintering. X-ray diffraction (XRD) analysis shows that PtSn/C has a low alloying degree and is mainly composed of Pt and Pt3Sn phases. The remaining Sn is present in the form of very small tin oxide particles. Different surfaces are obtained by double-layer, oxide, and CO annealing of the Pt/C and PtSn/C catalysts and by modifying the CO-annealed surfaces with irreversibly adsorbed tin, Sn-irr. The presence of Sn in any form (oxide, alloyed, or Sn-irr) on the surface shifts the onset potential for the CO oxidation negatively by more than 0.4 V in comparison to equivalently treated Pt/C catalysts. For the CO-annealed PtSn/C catalyst, a so-called skeleton structure, Sn is present only in the subsurface layers. The subsurface Sn has a mild effect on the CO activity, and hence the onset potential is only marginally shifted to cathodic potentials by similar to 50 mV compared to that on Pt/C. The formic acid oxidation is enhanced at any of the PtSn/C surfaces with Sn in the surface layer. The activity enhancement is explained by a reduced CO poisoning of the surface Pt sites. As a consequence, the current is not entering plateau as on the Pt/C catalysts. Furthermore, the skeleton PtSn/C similar to 2 is times more active than similarly treated Pt/C. The results have been substantiated and explained by comprehensive density functional theory (DFT) simulations. The DFT results indicate that the increased oxidation rates are not only due to surface Sn but also due to a weakened CO binding in the vicinity of the surface SnOHx moieties and SnO2 particles.
PB  - American Chemical Society (ACS)
T2  - Journal of Physical Chemistry C
T1  - Insight into the Effect of Sn on CO and Formic Acid Oxidation at PtSn Catalysts
VL  - 118
IS  - 1
SP  - 278
EP  - 289
DO  - 10.1021/jp408207u
ER  - 

@article{
author = "Stevanović, Sanja and Tripković, Dušan and Tripković, Vladimir and Minić, Dragica M. and Gavrilović, Aleksandra and Tripković, Amalija and Jovanović, Vladislava M.",
year = "2014",
abstract = "The role of Sn on the catalytic activity for CO and formic acid oxidation is studied by comparing the activities of differently treated PtSn/C and Pt/C catalysts. The catalysts are prepared by a microwave-assisted polyol synthesis method. As revealed by scanning tunneling and transmission electron microscopic (STM and TEM) characterization, the outcomes of the synthesis procedure for both Pt and PtSn are small particles, similar to 1.5 nm in diameter. Upon deposition on the carbon support, the particle size increases to similar to 2.5 nm due to sintering. X-ray diffraction (XRD) analysis shows that PtSn/C has a low alloying degree and is mainly composed of Pt and Pt3Sn phases. The remaining Sn is present in the form of very small tin oxide particles. Different surfaces are obtained by double-layer, oxide, and CO annealing of the Pt/C and PtSn/C catalysts and by modifying the CO-annealed surfaces with irreversibly adsorbed tin, Sn-irr. The presence of Sn in any form (oxide, alloyed, or Sn-irr) on the surface shifts the onset potential for the CO oxidation negatively by more than 0.4 V in comparison to equivalently treated Pt/C catalysts. For the CO-annealed PtSn/C catalyst, a so-called skeleton structure, Sn is present only in the subsurface layers. The subsurface Sn has a mild effect on the CO activity, and hence the onset potential is only marginally shifted to cathodic potentials by similar to 50 mV compared to that on Pt/C. The formic acid oxidation is enhanced at any of the PtSn/C surfaces with Sn in the surface layer. The activity enhancement is explained by a reduced CO poisoning of the surface Pt sites. As a consequence, the current is not entering plateau as on the Pt/C catalysts. Furthermore, the skeleton PtSn/C similar to 2 is times more active than similarly treated Pt/C. The results have been substantiated and explained by comprehensive density functional theory (DFT) simulations. The DFT results indicate that the increased oxidation rates are not only due to surface Sn but also due to a weakened CO binding in the vicinity of the surface SnOHx moieties and SnO2 particles.",
publisher = "American Chemical Society (ACS)",
journal = "Journal of Physical Chemistry C",
title = "Insight into the Effect of Sn on CO and Formic Acid Oxidation at PtSn Catalysts",
volume = "118",
number = "1",
pages = "278-289",
doi = "10.1021/jp408207u"
}

Stevanović, S., Tripković, D., Tripković, V., Minić, D. M., Gavrilović, A., Tripković, A.,& Jovanović, V. M.. (2014). Insight into the Effect of Sn on CO and Formic Acid Oxidation at PtSn Catalysts. in Journal of Physical Chemistry C
American Chemical Society (ACS)., 118(1), 278-289.
https://doi.org/10.1021/jp408207u

Stevanović S, Tripković D, Tripković V, Minić DM, Gavrilović A, Tripković A, Jovanović VM. Insight into the Effect of Sn on CO and Formic Acid Oxidation at PtSn Catalysts. in Journal of Physical Chemistry C. 2014;118(1):278-289.
doi:10.1021/jp408207u .

Stevanović, Sanja, Tripković, Dušan, Tripković, Vladimir, Minić, Dragica M., Gavrilović, Aleksandra, Tripković, Amalija, Jovanović, Vladislava M., "Insight into the Effect of Sn on CO and Formic Acid Oxidation at PtSn Catalysts" in Journal of Physical Chemistry C, 118, no. 1 (2014):278-289,
https://doi.org/10.1021/jp408207u . .

TY  - JOUR
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Panić, Vladimir
AU  - Dekanski, Aleksandar
AU  - Jovanović, Vladislava M.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1530
AB  - In previous investigations the physicochemical state of electrochemically activated glassy carbon (GC) has been found to affect the electrochemical activity of GC-supported Pt particles. It has been assumed that carbon functional groups (CFGs) generated by GC anodization are able to renew the Pt surface through bifunctional catalysis. In order to provide evidence for the intimate electrocatalytic relationship between Pt and anodized GC and reveal the cause of CFG-induced enhancement of Pt activity, the dynamic response of Pt black supported on differently anodized GC is analysed in this paper by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in acidic solution. It was found that the capacitive properties of Pt black are not affected by modest GC anodization, but the pore resistance of the Pt layer is considerably affected. Clear evidence for the promoting influence of activated GC (i.e., CFGs) on the Pt desorption capability toward reverse hydrogen spillover at a Pt/CFGs-decorated GC interface in the Pt double layer region is elucidated by both EIS and CV measurements. The extent of GC anodization influences, in a quite similar way, both reverse hydrogen spillover desorption parameters (gained by EIS and CV) and the methanol oxidation rate as it has influence on the parameters describing the particular state of activated GC itself. Namely, the pore resistance of the Pt layer and GC resistance due to the presence of CFGs the highest when GC was moderately anodized, whereas the charge transfer resistance for hydrogen spillover desorption is the lowest. The CFGs of the anodized GC are able to "permeate" the above-applied Pt layer, thus increasing the Pt/ CFGs-decorated GC interface responsible for the enhancement of Pt electrochemical activity.
PB  - The Royal Society of Chemistry
T2  - RSC Advances
T1  - Platinum electrocatalyst supported on glassy carbon: a dynamic response analysis of Pt activity promoted by substrate anodization
VL  - 4
IS  - 6
SP  - 3051
EP  - 3059
DO  - 10.1039/c3ra45585h
ER  - 

@article{
author = "Stevanović, Sanja and Tripković, Dušan and Panić, Vladimir and Dekanski, Aleksandar and Jovanović, Vladislava M.",
year = "2014",
abstract = "In previous investigations the physicochemical state of electrochemically activated glassy carbon (GC) has been found to affect the electrochemical activity of GC-supported Pt particles. It has been assumed that carbon functional groups (CFGs) generated by GC anodization are able to renew the Pt surface through bifunctional catalysis. In order to provide evidence for the intimate electrocatalytic relationship between Pt and anodized GC and reveal the cause of CFG-induced enhancement of Pt activity, the dynamic response of Pt black supported on differently anodized GC is analysed in this paper by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in acidic solution. It was found that the capacitive properties of Pt black are not affected by modest GC anodization, but the pore resistance of the Pt layer is considerably affected. Clear evidence for the promoting influence of activated GC (i.e., CFGs) on the Pt desorption capability toward reverse hydrogen spillover at a Pt/CFGs-decorated GC interface in the Pt double layer region is elucidated by both EIS and CV measurements. The extent of GC anodization influences, in a quite similar way, both reverse hydrogen spillover desorption parameters (gained by EIS and CV) and the methanol oxidation rate as it has influence on the parameters describing the particular state of activated GC itself. Namely, the pore resistance of the Pt layer and GC resistance due to the presence of CFGs the highest when GC was moderately anodized, whereas the charge transfer resistance for hydrogen spillover desorption is the lowest. The CFGs of the anodized GC are able to "permeate" the above-applied Pt layer, thus increasing the Pt/ CFGs-decorated GC interface responsible for the enhancement of Pt electrochemical activity.",
publisher = "The Royal Society of Chemistry",
journal = "RSC Advances",
title = "Platinum electrocatalyst supported on glassy carbon: a dynamic response analysis of Pt activity promoted by substrate anodization",
volume = "4",
number = "6",
pages = "3051-3059",
doi = "10.1039/c3ra45585h"
}

Stevanović, S., Tripković, D., Panić, V., Dekanski, A.,& Jovanović, V. M.. (2014). Platinum electrocatalyst supported on glassy carbon: a dynamic response analysis of Pt activity promoted by substrate anodization. in RSC Advances
The Royal Society of Chemistry., 4(6), 3051-3059.
https://doi.org/10.1039/c3ra45585h

Stevanović S, Tripković D, Panić V, Dekanski A, Jovanović VM. Platinum electrocatalyst supported on glassy carbon: a dynamic response analysis of Pt activity promoted by substrate anodization. in RSC Advances. 2014;4(6):3051-3059.
doi:10.1039/c3ra45585h .

Stevanović, Sanja, Tripković, Dušan, Panić, Vladimir, Dekanski, Aleksandar, Jovanović, Vladislava M., "Platinum electrocatalyst supported on glassy carbon: a dynamic response analysis of Pt activity promoted by substrate anodization" in RSC Advances, 4, no. 6 (2014):3051-3059,
https://doi.org/10.1039/c3ra45585h . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Tripković, Vladimir
AU  - Stevanović, Rade M.
AU  - Popović, Ksenija
AU  - Jovanović, Vladislava M.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1553
AB  - Formic acid oxidation was studied on platinum-bismuth deposits on glassy carbon (GC) substrate. The catalysts of equimolar ratio were prepared by potentiostatic deposition using chronocoulometry. Bimetallic structures obtained by two-step process, comprising deposition of Bi followed by deposition of Pt, were characterized by AFM spectroscopy which indicated that Pt crystallizes preferentially onto previously formed Bi particles. The issue of Bi leaching (dissolution) from PtBi catalysts, and their catalytic effect alongside the HCOOH oxidation is rather unresolved. In order to control Bi dissolution, deposits were subjected to electrochemical oxidation, in the relevant potential range and supporting electrolyte, prior to use as catalysts for HCOOH oxidation. Anodic striping charges indicated that along oxidation procedure most of deposited Bi was oxidized. ICP mass spectroscopy analysis of the electrolyte after this electrochemical treatment revealed that Bi was only partly dissolved indicating the possibility for formation of some Bi oxide species. Moreover, EDX analysis of the as prepared (Pt"Bi/GC) catalysts and those oxidized confirmed appreciably higher content of oxygen in the latter. Catalysts prepared in this way exhibit about 10 times higher activity for formic acid oxidation in comparison to pure Pt, as revealed both by potentiodynamic and quasy-potentiostatic measurements. This high activity is the result of well-balanced ensemble effect induced by Bi-oxide species interrupting Pt domains. Prolonged cycling and chronoamperometry tests disclosed exceptional stability of the catalyst during formic acid oxidation. The activity is compatible with the activity of previously studied Pt2Bi alloy but the stability is significantly better.
PB  - Electrochemical Soc Inc, Pennington
T2  - Journal of the Electrochemical Society
T1  - Formic Acid Oxidation at Platinum-Bismuth Clusters
VL  - 161
IS  - 9
DO  - 10.1149/2.0831409jes
ER  - 

@article{
author = "Lović, Jelena and Stevanović, Sanja and Tripković, Dušan and Tripković, Vladimir and Stevanović, Rade M. and Popović, Ksenija and Jovanović, Vladislava M.",
year = "2014",
abstract = "Formic acid oxidation was studied on platinum-bismuth deposits on glassy carbon (GC) substrate. The catalysts of equimolar ratio were prepared by potentiostatic deposition using chronocoulometry. Bimetallic structures obtained by two-step process, comprising deposition of Bi followed by deposition of Pt, were characterized by AFM spectroscopy which indicated that Pt crystallizes preferentially onto previously formed Bi particles. The issue of Bi leaching (dissolution) from PtBi catalysts, and their catalytic effect alongside the HCOOH oxidation is rather unresolved. In order to control Bi dissolution, deposits were subjected to electrochemical oxidation, in the relevant potential range and supporting electrolyte, prior to use as catalysts for HCOOH oxidation. Anodic striping charges indicated that along oxidation procedure most of deposited Bi was oxidized. ICP mass spectroscopy analysis of the electrolyte after this electrochemical treatment revealed that Bi was only partly dissolved indicating the possibility for formation of some Bi oxide species. Moreover, EDX analysis of the as prepared (Pt"Bi/GC) catalysts and those oxidized confirmed appreciably higher content of oxygen in the latter. Catalysts prepared in this way exhibit about 10 times higher activity for formic acid oxidation in comparison to pure Pt, as revealed both by potentiodynamic and quasy-potentiostatic measurements. This high activity is the result of well-balanced ensemble effect induced by Bi-oxide species interrupting Pt domains. Prolonged cycling and chronoamperometry tests disclosed exceptional stability of the catalyst during formic acid oxidation. The activity is compatible with the activity of previously studied Pt2Bi alloy but the stability is significantly better.",
publisher = "Electrochemical Soc Inc, Pennington",
journal = "Journal of the Electrochemical Society",
title = "Formic Acid Oxidation at Platinum-Bismuth Clusters",
volume = "161",
number = "9",
doi = "10.1149/2.0831409jes"
}

Lović, J., Stevanović, S., Tripković, D., Tripković, V., Stevanović, R. M., Popović, K.,& Jovanović, V. M.. (2014). Formic Acid Oxidation at Platinum-Bismuth Clusters. in Journal of the Electrochemical Society
Electrochemical Soc Inc, Pennington., 161(9).
https://doi.org/10.1149/2.0831409jes

Lović J, Stevanović S, Tripković D, Tripković V, Stevanović RM, Popović K, Jovanović VM. Formic Acid Oxidation at Platinum-Bismuth Clusters. in Journal of the Electrochemical Society. 2014;161(9).
doi:10.1149/2.0831409jes .

Lović, Jelena, Stevanović, Sanja, Tripković, Dušan, Tripković, Vladimir, Stevanović, Rade M., Popović, Ksenija, Jovanović, Vladislava M., "Formic Acid Oxidation at Platinum-Bismuth Clusters" in Journal of the Electrochemical Society, 161, no. 9 (2014),
https://doi.org/10.1149/2.0831409jes . .

TY  - JOUR
AU  - Mladenović, Aleksandar R.
AU  - Mijin, Dušan
AU  - Drmanić, Saša Ž.
AU  - Vajs, Vlatka
AU  - Jovanović, Vladislava M.
AU  - Petrović, Slobodan D.
AU  - Avramov Ivić, Milka
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1577
AB  - The oxidative ability of donepezil, a frequently prescribed drug for the treatment of Alzheimer's disease is reported for the first time at a gold electrode. It was oxidized by cyclic voltammetry and determined by square wave voltammetry in phosphate buffer electrolyte. Electrochemical degradation of donepezil was carried out by long term potential cycling. The identification and characterization of the major product, isolated by preparative high performance liquid chromatography, was performed by high resolution mass spectrometry and 1D and 2D nuclear magnetic resonance spectroscopy. Donepezil hydroxy derivative was identified as the major electrochemical oxidation product from donepezil.
PB  - Wiley-Blackwell, Malden
T2  - Electroanalysis
T1  - Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode
VL  - 26
IS  - 5
SP  - 893
EP  - 897
DO  - 10.1002/elan.201400034
ER  - 

@article{
author = "Mladenović, Aleksandar R. and Mijin, Dušan and Drmanić, Saša Ž. and Vajs, Vlatka and Jovanović, Vladislava M. and Petrović, Slobodan D. and Avramov Ivić, Milka",
year = "2014",
abstract = "The oxidative ability of donepezil, a frequently prescribed drug for the treatment of Alzheimer's disease is reported for the first time at a gold electrode. It was oxidized by cyclic voltammetry and determined by square wave voltammetry in phosphate buffer electrolyte. Electrochemical degradation of donepezil was carried out by long term potential cycling. The identification and characterization of the major product, isolated by preparative high performance liquid chromatography, was performed by high resolution mass spectrometry and 1D and 2D nuclear magnetic resonance spectroscopy. Donepezil hydroxy derivative was identified as the major electrochemical oxidation product from donepezil.",
publisher = "Wiley-Blackwell, Malden",
journal = "Electroanalysis",
title = "Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode",
volume = "26",
number = "5",
pages = "893-897",
doi = "10.1002/elan.201400034"
}

Mladenović, A. R., Mijin, D., Drmanić, S. Ž., Vajs, V., Jovanović, V. M., Petrović, S. D.,& Avramov Ivić, M.. (2014). Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode. in Electroanalysis
Wiley-Blackwell, Malden., 26(5), 893-897.
https://doi.org/10.1002/elan.201400034

Mladenović AR, Mijin D, Drmanić SŽ, Vajs V, Jovanović VM, Petrović SD, Avramov Ivić M. Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode. in Electroanalysis. 2014;26(5):893-897.
doi:10.1002/elan.201400034 .

Mladenović, Aleksandar R., Mijin, Dušan, Drmanić, Saša Ž., Vajs, Vlatka, Jovanović, Vladislava M., Petrović, Slobodan D., Avramov Ivić, Milka, "Electrochemical Oxidation of Donepezil and Its Voltammetric Determination at Gold Electrode" in Electroanalysis, 26, no. 5 (2014):893-897,
https://doi.org/10.1002/elan.201400034 . .

TY  - JOUR
AU  - Kaluđerović, Branka
AU  - Jovanović, Vladislava M.
AU  - Stevanović, Sanja
AU  - Bogdanov, Žarko D.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1527
AB  - An ultrasonic irradiation was applied for the impregnation by chemical agents in the chemical activation process of new type of active carbon precursor. Plane tree seed, due to the unique fibrous structure and low cost is a promising eco-friendly raw material for the preparation of activated carbon materials. Ultrasonic irradiation was used for the impregnation step allowing the chemical activation by different agents: potassium or sodium hydroxide, hydrogen peroxide and pyrogallol. The porous structures were examined by nitrogen adsorption/desorption isotherms at 77 K and electrochemically by cyclic voltammetry. The textures of these materials were observed by scanning electron microscopy. The application of ultrasonic irradiation in the impregnation step increased surface area of the final material more than two times in comparison to the material which impregnation in the activation process was by conventional stirring. Ultrasonic irradiation enhances the chemical activation process and the activated carbon fibrous materials with nanoporous structure were obtained by impregnation of seeds with alkaline hydroxides. Total surface areas of these samples were 976 m(2) g(-1), and 1130 m(2) g(-1). These fibers have total specific capacitance as high as 125 F g(-1) and 53 F g(-1) which major fraction in both cases originate from internal micropores structure.
PB  - Elsevier
T2  - Ultrasonics Sonochemistry
T1  - Characterization of nanoporous carbon fibrous materials obtained by chemical activation of plane tree seed under ultrasonic irradiation
VL  - 21
IS  - 2
SP  - 782
EP  - 789
DO  - 10.1016/j.ultsonch.2013.09.004
ER  - 

@article{
author = "Kaluđerović, Branka and Jovanović, Vladislava M. and Stevanović, Sanja and Bogdanov, Žarko D.",
year = "2014",
abstract = "An ultrasonic irradiation was applied for the impregnation by chemical agents in the chemical activation process of new type of active carbon precursor. Plane tree seed, due to the unique fibrous structure and low cost is a promising eco-friendly raw material for the preparation of activated carbon materials. Ultrasonic irradiation was used for the impregnation step allowing the chemical activation by different agents: potassium or sodium hydroxide, hydrogen peroxide and pyrogallol. The porous structures were examined by nitrogen adsorption/desorption isotherms at 77 K and electrochemically by cyclic voltammetry. The textures of these materials were observed by scanning electron microscopy. The application of ultrasonic irradiation in the impregnation step increased surface area of the final material more than two times in comparison to the material which impregnation in the activation process was by conventional stirring. Ultrasonic irradiation enhances the chemical activation process and the activated carbon fibrous materials with nanoporous structure were obtained by impregnation of seeds with alkaline hydroxides. Total surface areas of these samples were 976 m(2) g(-1), and 1130 m(2) g(-1). These fibers have total specific capacitance as high as 125 F g(-1) and 53 F g(-1) which major fraction in both cases originate from internal micropores structure.",
publisher = "Elsevier",
journal = "Ultrasonics Sonochemistry",
title = "Characterization of nanoporous carbon fibrous materials obtained by chemical activation of plane tree seed under ultrasonic irradiation",
volume = "21",
number = "2",
pages = "782-789",
doi = "10.1016/j.ultsonch.2013.09.004"
}

Kaluđerović, B., Jovanović, V. M., Stevanović, S.,& Bogdanov, Ž. D.. (2014). Characterization of nanoporous carbon fibrous materials obtained by chemical activation of plane tree seed under ultrasonic irradiation. in Ultrasonics Sonochemistry
Elsevier., 21(2), 782-789.
https://doi.org/10.1016/j.ultsonch.2013.09.004

Kaluđerović B, Jovanović VM, Stevanović S, Bogdanov ŽD. Characterization of nanoporous carbon fibrous materials obtained by chemical activation of plane tree seed under ultrasonic irradiation. in Ultrasonics Sonochemistry. 2014;21(2):782-789.
doi:10.1016/j.ultsonch.2013.09.004 .

Kaluđerović, Branka, Jovanović, Vladislava M., Stevanović, Sanja, Bogdanov, Žarko D., "Characterization of nanoporous carbon fibrous materials obtained by chemical activation of plane tree seed under ultrasonic irradiation" in Ultrasonics Sonochemistry, 21, no. 2 (2014):782-789,
https://doi.org/10.1016/j.ultsonch.2013.09.004 . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Tripković, Dušan
AU  - Popović, Ksenija
AU  - Jovanović, Vladislava M.
AU  - Tripković, Amalija
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1251
AB  - Formic acid oxidation was studied on two Pt-Bi catalysts, i.e., Pt2Bi and polycrystalline Pt modified by irreversible adsorbed Bi (Pt/Biirr) in order to establish the difference between the effects of Biirr and Bi in the alloyed state. The results were compared to pure Pt. It was found that both bimetallic catalysts were more active than Pt with the onset potentials shifted to more negative values and the currents at 0.0 V vs. saturated calomel electrode (under steady state conditions) improved by up to two order of magnitude. The origin of the high activity and stability of Pt2Bi was increased selectivity toward formic acid dehydrogenation caused by the ensemble and electronic effects and suppression of Bi leaching from the surface during formic acid oxidation. However, although Pt/Biirr also showed remarkable initial activity compared to pure Pt, dissolution of Bi was not suppressed and poisoning of the electrode surface induced by the dehydration path was observed. Comparison of the initial quasi-steady state and potentiodynamic results obtained for these two Pt-Bi catalysts revealed that the electronic effect, existing only in the alloy, contributed to the earlier start of the reaction, while the maximum current density was determined by the ensemble effect.
AB  - Oksidacija mravlje kiseline ispitivana je na dva tipa Pt-Bi katalizatora: Pt2Bi elektrodi i na polikristalnoj Pt elektrodi modifikovanoj ireverzibilno adsorbovanim Bi (Pt/Biirr). Aktivnosti su upoređene sa rezultatima dobijenim na čistoj poli- kristalnoj Pt elektrodi. Cilj je bio da se objasni razlika u delovanju ireverzibilno adsorbovanog Bi (Biirr) i Bi u legiranom stanju. Pokazano je da su oba bimetalna katalizatora aktivnija od polikristalne Pt, početak reakcije je pomeren ka negativnijim vrednostima i u poređenju sa čistom Pt pri stacionarnim uslovima dobijene su do dva reda veličine veće gustine struje. Razlog za veliku aktivnost i stabilnost Pt2Bi elektrode u oksidaciji mravlje kiseline je odigravanje reakcije po glavnom reakcionom putu (dehidroganacija mravlje kiseline), što je izazvano efektom trećeg tela i elektronskim efektom, kao i sprečavanje izluživanja Bi iz elektrode. S druge strane, iako Pt/Biirr pokazuje značajnu početnu aktivnost u odnosu na Pt, ova elektroda nije stabilna tokom reakcije oksidacije HCOOH zbog kontinualnog rastvaranja Bi sa površine elektrode, kao i trovanja površine izazvanog tokom reakcije po indirektnom, dehidratacionom putu. Poređenjem rezultata dobijenih na ove dve Pt-Bi elektrode može se objasniti uloga efekta trećeg tela i elektronskog efekta u oksidaciji HCOOH. Naime, elektronski efekat, koji postoji samo kod legure, doprinosi ranijem početku reakcije, dok je maksimalna struja određena efektom trećeg tela. Tokom cikliziranja Pt/Biirr elektrode Bi odlazi sa površine i efekat trećeg tela se gubi tokom vremena. Hronoamperometrijska merenja ukazuju na prednost legure, odnosno neophodnost legiranja Bi sa Pt da bi se dobio koroziono stabilan katalizator.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Electrocatalytic properties of Pt-Bi electrodes towards the electro-oxidation of formic acid
T1  - Elektrokatalitička svojstva Pt-Bi elektroda u oksidaciji mravlje kiseline
VL  - 78
IS  - 8
SP  - 1189
EP  - 1202
DO  - 10.2298/JSC121012138L
ER  - 

@article{
author = "Lović, Jelena and Tripković, Dušan and Popović, Ksenija and Jovanović, Vladislava M. and Tripković, Amalija",
year = "2013",
abstract = "Formic acid oxidation was studied on two Pt-Bi catalysts, i.e., Pt2Bi and polycrystalline Pt modified by irreversible adsorbed Bi (Pt/Biirr) in order to establish the difference between the effects of Biirr and Bi in the alloyed state. The results were compared to pure Pt. It was found that both bimetallic catalysts were more active than Pt with the onset potentials shifted to more negative values and the currents at 0.0 V vs. saturated calomel electrode (under steady state conditions) improved by up to two order of magnitude. The origin of the high activity and stability of Pt2Bi was increased selectivity toward formic acid dehydrogenation caused by the ensemble and electronic effects and suppression of Bi leaching from the surface during formic acid oxidation. However, although Pt/Biirr also showed remarkable initial activity compared to pure Pt, dissolution of Bi was not suppressed and poisoning of the electrode surface induced by the dehydration path was observed. Comparison of the initial quasi-steady state and potentiodynamic results obtained for these two Pt-Bi catalysts revealed that the electronic effect, existing only in the alloy, contributed to the earlier start of the reaction, while the maximum current density was determined by the ensemble effect., Oksidacija mravlje kiseline ispitivana je na dva tipa Pt-Bi katalizatora: Pt2Bi elektrodi i na polikristalnoj Pt elektrodi modifikovanoj ireverzibilno adsorbovanim Bi (Pt/Biirr). Aktivnosti su upoređene sa rezultatima dobijenim na čistoj poli- kristalnoj Pt elektrodi. Cilj je bio da se objasni razlika u delovanju ireverzibilno adsorbovanog Bi (Biirr) i Bi u legiranom stanju. Pokazano je da su oba bimetalna katalizatora aktivnija od polikristalne Pt, početak reakcije je pomeren ka negativnijim vrednostima i u poređenju sa čistom Pt pri stacionarnim uslovima dobijene su do dva reda veličine veće gustine struje. Razlog za veliku aktivnost i stabilnost Pt2Bi elektrode u oksidaciji mravlje kiseline je odigravanje reakcije po glavnom reakcionom putu (dehidroganacija mravlje kiseline), što je izazvano efektom trećeg tela i elektronskim efektom, kao i sprečavanje izluživanja Bi iz elektrode. S druge strane, iako Pt/Biirr pokazuje značajnu početnu aktivnost u odnosu na Pt, ova elektroda nije stabilna tokom reakcije oksidacije HCOOH zbog kontinualnog rastvaranja Bi sa površine elektrode, kao i trovanja površine izazvanog tokom reakcije po indirektnom, dehidratacionom putu. Poređenjem rezultata dobijenih na ove dve Pt-Bi elektrode može se objasniti uloga efekta trećeg tela i elektronskog efekta u oksidaciji HCOOH. Naime, elektronski efekat, koji postoji samo kod legure, doprinosi ranijem početku reakcije, dok je maksimalna struja određena efektom trećeg tela. Tokom cikliziranja Pt/Biirr elektrode Bi odlazi sa površine i efekat trećeg tela se gubi tokom vremena. Hronoamperometrijska merenja ukazuju na prednost legure, odnosno neophodnost legiranja Bi sa Pt da bi se dobio koroziono stabilan katalizator.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Electrocatalytic properties of Pt-Bi electrodes towards the electro-oxidation of formic acid, Elektrokatalitička svojstva Pt-Bi elektroda u oksidaciji mravlje kiseline",
volume = "78",
number = "8",
pages = "1189-1202",
doi = "10.2298/JSC121012138L"
}

Lović, J., Tripković, D., Popović, K., Jovanović, V. M.,& Tripković, A.. (2013). Electrocatalytic properties of Pt-Bi electrodes towards the electro-oxidation of formic acid. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 78(8), 1189-1202.
https://doi.org/10.2298/JSC121012138L

Lović J, Tripković D, Popović K, Jovanović VM, Tripković A. Electrocatalytic properties of Pt-Bi electrodes towards the electro-oxidation of formic acid. in Journal of the Serbian Chemical Society. 2013;78(8):1189-1202.
doi:10.2298/JSC121012138L .

Lović, Jelena, Tripković, Dušan, Popović, Ksenija, Jovanović, Vladislava M., Tripković, Amalija, "Electrocatalytic properties of Pt-Bi electrodes towards the electro-oxidation of formic acid" in Journal of the Serbian Chemical Society, 78, no. 8 (2013):1189-1202,
https://doi.org/10.2298/JSC121012138L . .

TY  - JOUR
AU  - Petković, Branka B.
AU  - Milčić, Miloš
AU  - Stanković, Dalibor
AU  - Stambolic, I.
AU  - Manojlović, Dragan
AU  - Jovanović, Vladislava M.
AU  - Sovilj, Sofija P.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1288
AB  - The complexation reactions between octaazamacrocyclic ligand N,N',N '',N'"-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane (tpmc) and Co2+, Ni2+, Zn2+ and Cu2+ metal cations have been studied conductometrically in acetonitrile and aqueous solutions. The conductance data exhibit different stoichiometry of the complexes in two studied solutions. In most cases 1:1 (ML) complexes were formed while in some cases 2:1 (M2L) complexes are evident. The stability constants of the resulting 1:1 complexes were determined by computer fitting of the conductance/mole ratio data. Theoretical DFT calculations were used to explain metal binding capability of tpmc ligand and the binding sequences were found to follow the order: Cu2+ >> Ni2+ > Co2+ > Zn2+. The combination of results obtained by this theoretical approach and conductometric study successfully explains sensitivity and selectivity of recently developed tpmc based ISE and could play a guiding role in planning experiments with large macrocyclic ligands.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Electrochimica Acta
T1  - Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study
VL  - 89
SP  - 680
EP  - 687
DO  - 10.1016/j.electacta.2012.11.100
ER  - 

@article{
author = "Petković, Branka B. and Milčić, Miloš and Stanković, Dalibor and Stambolic, I. and Manojlović, Dragan and Jovanović, Vladislava M. and Sovilj, Sofija P.",
year = "2013",
abstract = "The complexation reactions between octaazamacrocyclic ligand N,N',N '',N'"-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraazacyclotetradecane (tpmc) and Co2+, Ni2+, Zn2+ and Cu2+ metal cations have been studied conductometrically in acetonitrile and aqueous solutions. The conductance data exhibit different stoichiometry of the complexes in two studied solutions. In most cases 1:1 (ML) complexes were formed while in some cases 2:1 (M2L) complexes are evident. The stability constants of the resulting 1:1 complexes were determined by computer fitting of the conductance/mole ratio data. Theoretical DFT calculations were used to explain metal binding capability of tpmc ligand and the binding sequences were found to follow the order: Cu2+ >> Ni2+ > Co2+ > Zn2+. The combination of results obtained by this theoretical approach and conductometric study successfully explains sensitivity and selectivity of recently developed tpmc based ISE and could play a guiding role in planning experiments with large macrocyclic ligands.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Electrochimica Acta",
title = "Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study",
volume = "89",
pages = "680-687",
doi = "10.1016/j.electacta.2012.11.100"
}

Petković, B. B., Milčić, M., Stanković, D., Stambolic, I., Manojlović, D., Jovanović, V. M.,& Sovilj, S. P.. (2013). Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study. in Electrochimica Acta
Oxford : Pergamon-Elsevier Science Ltd., 89, 680-687.
https://doi.org/10.1016/j.electacta.2012.11.100

Petković BB, Milčić M, Stanković D, Stambolic I, Manojlović D, Jovanović VM, Sovilj SP. Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study. in Electrochimica Acta. 2013;89:680-687.
doi:10.1016/j.electacta.2012.11.100 .

Petković, Branka B., Milčić, Miloš, Stanković, Dalibor, Stambolic, I., Manojlović, Dragan, Jovanović, Vladislava M., Sovilj, Sofija P., "Complexation ability of octaazamacrocyclic ligand toward Co2+, Ni2+, Cu2+ and Zn2+ metal cations: Experimental and theoretical study" in Electrochimica Acta, 89 (2013):680-687,
https://doi.org/10.1016/j.electacta.2012.11.100 . .