TY  - CONF
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Popović, Ksenija
PY  - 2022
UR  - https://www.mrs-serbia.org.rs/index.php/book-of-abstracts-2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5940
AB  - In this study, we have investigated how the change in surface composition of Pt thin film deposited 
on Ni and Cr supports, induced by the controlled thermal treatment, reflects on catalyst 
performance for the electrooxidation of formic acid.
PB  - Materials Research Society of Serbia
C3  - Program and the Book of Abstracts - 23rd Annual Conference YUCOMAT & 12th World Round Table Conference on Sintering XII WRTCS, 2022, August 29-September 2, Herceg Novi, Montenegro
T1  - The influence of substrate and thermal annealing on calalytic activity and stability of Pt thin film catalysts
SP  - 57
EP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_cer_5940
ER  - 

@conference{
author = "Stevanović, Sanja and Tripković, Dušan and Popović, Ksenija",
year = "2022",
abstract = "In this study, we have investigated how the change in surface composition of Pt thin film deposited 
on Ni and Cr supports, induced by the controlled thermal treatment, reflects on catalyst 
performance for the electrooxidation of formic acid.",
publisher = "Materials Research Society of Serbia",
journal = "Program and the Book of Abstracts - 23rd Annual Conference YUCOMAT & 12th World Round Table Conference on Sintering XII WRTCS, 2022, August 29-September 2, Herceg Novi, Montenegro",
title = "The influence of substrate and thermal annealing on calalytic activity and stability of Pt thin film catalysts",
pages = "57-57",
url = "https://hdl.handle.net/21.15107/rcub_cer_5940"
}

Stevanović, S., Tripković, D.,& Popović, K.. (2022). The influence of substrate and thermal annealing on calalytic activity and stability of Pt thin film catalysts. in Program and the Book of Abstracts - 23rd Annual Conference YUCOMAT & 12th World Round Table Conference on Sintering XII WRTCS, 2022, August 29-September 2, Herceg Novi, Montenegro
Materials Research Society of Serbia., 57-57.
https://hdl.handle.net/21.15107/rcub_cer_5940

Stevanović S, Tripković D, Popović K. The influence of substrate and thermal annealing on calalytic activity and stability of Pt thin film catalysts. in Program and the Book of Abstracts - 23rd Annual Conference YUCOMAT & 12th World Round Table Conference on Sintering XII WRTCS, 2022, August 29-September 2, Herceg Novi, Montenegro. 2022;:57-57.
https://hdl.handle.net/21.15107/rcub_cer_5940 .

Stevanović, Sanja, Tripković, Dušan, Popović, Ksenija, "The influence of substrate and thermal annealing on calalytic activity and stability of Pt thin film catalysts" in Program and the Book of Abstracts - 23rd Annual Conference YUCOMAT & 12th World Round Table Conference on Sintering XII WRTCS, 2022, August 29-September 2, Herceg Novi, Montenegro (2022):57-57,
https://hdl.handle.net/21.15107/rcub_cer_5940 .

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  - CHAP
AU  - Lović, Jelena
AU  - Popović, Ksenija
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4358
AB  - The development of direct formic acid fuel cells (DFAFCs) attracts attention because formic acid is a non-toxic and non-flammable liquid fuel and has a smaller crossover flux than methanol through polymer electrolyte membrane. One of the greatest challenges in the commercialization of DFAFCs is the development of alternatives to Pt, catalysts known to produce high power density at room temperature, but their resourses are limited. Besides, Pt is susceptible to poisoning due to strongly adsorbed intermediates formed during the oxidation processes, also showing long-term instability in acid solution. In order to use formic acid in DFAFCs effectively, the synthesis of catalysts with high activity and stability are a target topic in material science. Many Pt-based binary alloys have been investigated and great effort has been put into the improvement of physical properties by controlling composition, size and structure, since these properties are crucial to the enhancement of the activity and selectivity. Among the most extensively studied are Pt-Bi catalysts. According to the results on which influence formic acid oxidation presented in this report, few types of Pt–based bimetallic catalysts (bulk, supported and low loading deposits) showed superior catalytic activity in terms of lower onset potentials and oxidation current densities, as well as exceptional stability compared to Pt. These findings are important for understanding the mechanism of formic acid electro-oxidation on differently prepared Pt-based surfaces, as well as the development of advanced anode catalysts with high activity, stability and durability applicable in DFAFCs.
PB  - New York, USA : Nova Science Publishers Inc.
T2  - Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics
T1  - Catalytic Activity and Stability of Pt and Pt-based Electrodes Towards the Formic acid Oxidation
SP  - 119
EP  - 160
UR  - https://hdl.handle.net/21.15107/rcub_cer_4358
ER  - 

@inbook{
author = "Lović, Jelena and Popović, Ksenija",
year = "2019",
abstract = "The development of direct formic acid fuel cells (DFAFCs) attracts attention because formic acid is a non-toxic and non-flammable liquid fuel and has a smaller crossover flux than methanol through polymer electrolyte membrane. One of the greatest challenges in the commercialization of DFAFCs is the development of alternatives to Pt, catalysts known to produce high power density at room temperature, but their resourses are limited. Besides, Pt is susceptible to poisoning due to strongly adsorbed intermediates formed during the oxidation processes, also showing long-term instability in acid solution. In order to use formic acid in DFAFCs effectively, the synthesis of catalysts with high activity and stability are a target topic in material science. Many Pt-based binary alloys have been investigated and great effort has been put into the improvement of physical properties by controlling composition, size and structure, since these properties are crucial to the enhancement of the activity and selectivity. Among the most extensively studied are Pt-Bi catalysts. According to the results on which influence formic acid oxidation presented in this report, few types of Pt–based bimetallic catalysts (bulk, supported and low loading deposits) showed superior catalytic activity in terms of lower onset potentials and oxidation current densities, as well as exceptional stability compared to Pt. These findings are important for understanding the mechanism of formic acid electro-oxidation on differently prepared Pt-based surfaces, as well as the development of advanced anode catalysts with high activity, stability and durability applicable in DFAFCs.",
publisher = "New York, USA : Nova Science Publishers Inc.",
journal = "Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics",
booktitle = "Catalytic Activity and Stability of Pt and Pt-based Electrodes Towards the Formic acid Oxidation",
pages = "119-160",
url = "https://hdl.handle.net/21.15107/rcub_cer_4358"
}

Lović, J.,& Popović, K.. (2019). Catalytic Activity and Stability of Pt and Pt-based Electrodes Towards the Formic acid Oxidation. in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics
New York, USA : Nova Science Publishers Inc.., 119-160.
https://hdl.handle.net/21.15107/rcub_cer_4358

Lović J, Popović K. Catalytic Activity and Stability of Pt and Pt-based Electrodes Towards the Formic acid Oxidation. in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics. 2019;:119-160.
https://hdl.handle.net/21.15107/rcub_cer_4358 .

Lović, Jelena, Popović, Ksenija, "Catalytic Activity and Stability of Pt and Pt-based Electrodes Towards the Formic acid Oxidation" in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics (2019):119-160,
https://hdl.handle.net/21.15107/rcub_cer_4358 .

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  - JOUR
AU  - Popović, Ksenija
AU  - Lović, Jelena
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1819
AB  - The field of heterogeneous catalysis, specifically catalysis on bimetallic surfaces, has seen many advances over the past few decades. Bimetallic catalysts, which often show electronic and chemical properties that are distinct from those of their parent metals, offer the opportunity to obtain new catalysts with enhanced selectivity, activity, and stability. The oxidation of formic acid is of permanent interest as a model reaction for the mechanistic understanding of the electro-oxidation of small organic molecules and because of its technical relevance for fuel cell applications. Platinum is one of the most commonly used catalysts for this reaction, despite the fact that it shows a few significant disadvantages, such as high cost and extreme susceptibility to poisoning by CO. To solve these problems, several approaches have been used, but generally, they all consist in the modification of platinum with a second element. Especially, bismuth has received significant attention as a Pt modifier. According to the results presented in this review dealing with the effects influencing formic acid oxidation, it was found that two types of Pt-Bi bimetallic catalysts (bulk and low loading deposits on GC) showed superior catalytic activity in terms of lower onset potentials and oxidation current densities, as well as exceptional stability compared to Pt. The findings in this report are important for an understanding of the mechanism of formic acid electro-oxidation on the bulk alloy and decorated surface, for the development of advanced anode catalysts for direct formic acid fuel cells, as well as for the synthesis of novel low-loading bimetallic catalysts. The use of bimetallic compounds as anode catalysts is an effective solution to overcoming the problems of current stability in the oxidation of formic acid during long-term applications. In the future, the tolerance of both CO poisoning and electrochemical leaching should be considered as the key factors in the development of electrocatalysts for anodic reactions.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Formic acid oxidation at platinum-bismuth catalysts
VL  - 80
IS  - 10
SP  - 1217
EP  - 1249
DO  - 10.2298/JSC150318044P
ER  - 

@article{
author = "Popović, Ksenija and Lović, Jelena",
year = "2015",
abstract = "The field of heterogeneous catalysis, specifically catalysis on bimetallic surfaces, has seen many advances over the past few decades. Bimetallic catalysts, which often show electronic and chemical properties that are distinct from those of their parent metals, offer the opportunity to obtain new catalysts with enhanced selectivity, activity, and stability. The oxidation of formic acid is of permanent interest as a model reaction for the mechanistic understanding of the electro-oxidation of small organic molecules and because of its technical relevance for fuel cell applications. Platinum is one of the most commonly used catalysts for this reaction, despite the fact that it shows a few significant disadvantages, such as high cost and extreme susceptibility to poisoning by CO. To solve these problems, several approaches have been used, but generally, they all consist in the modification of platinum with a second element. Especially, bismuth has received significant attention as a Pt modifier. According to the results presented in this review dealing with the effects influencing formic acid oxidation, it was found that two types of Pt-Bi bimetallic catalysts (bulk and low loading deposits on GC) showed superior catalytic activity in terms of lower onset potentials and oxidation current densities, as well as exceptional stability compared to Pt. The findings in this report are important for an understanding of the mechanism of formic acid electro-oxidation on the bulk alloy and decorated surface, for the development of advanced anode catalysts for direct formic acid fuel cells, as well as for the synthesis of novel low-loading bimetallic catalysts. The use of bimetallic compounds as anode catalysts is an effective solution to overcoming the problems of current stability in the oxidation of formic acid during long-term applications. In the future, the tolerance of both CO poisoning and electrochemical leaching should be considered as the key factors in the development of electrocatalysts for anodic reactions.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Formic acid oxidation at platinum-bismuth catalysts",
volume = "80",
number = "10",
pages = "1217-1249",
doi = "10.2298/JSC150318044P"
}

Popović, K.,& Lović, J.. (2015). Formic acid oxidation at platinum-bismuth catalysts. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 80(10), 1217-1249.
https://doi.org/10.2298/JSC150318044P

Popović K, Lović J. Formic acid oxidation at platinum-bismuth catalysts. in Journal of the Serbian Chemical Society. 2015;80(10):1217-1249.
doi:10.2298/JSC150318044P .

Popović, Ksenija, Lović, Jelena, "Formic acid oxidation at platinum-bismuth catalysts" in Journal of the Serbian Chemical Society, 80, no. 10 (2015):1217-1249,
https://doi.org/10.2298/JSC150318044P . .

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  - 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  - 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  - Lović, Jelena
AU  - Obradović, Maja
AU  - Tripković, Dušan
AU  - Popović, Ksenija
AU  - Jovanović, Vladislava M.
AU  - Gojković, Snežana Lj.
AU  - Tripković, Amalija
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1061
AB  - Formic acid oxidation was studied on a new prepared Pt2Bi characterized by X-ray diffraction spectroscopy (phase composition), scanning tunneling microscopy (STM) (surface morphology), and COads stripping voltammetry (surface composition). Bulk composition of Pt2Bi revealed two phases-55% PtBi alloy and 45% Pt. Estimated contribution of pure Pt on the Pt2Bi surface (43.5%) determined by COads stripping voltammetry corresponds closely to bulk composition. Pt2Bi reveals high activity and stability in formic acid oxidation. High activity originates from the fact that formic acid oxidation proceeds completely through dehydrogenation path based on an ensemble effect. The high stability of Pt2Bi surface is induced by the suppression of Bi leaching as it was evidenced by insignificant changes of surface morphology and surface roughness shown by STM images before and after electrochemical treatment in formic acid containing solution. Pt2Bi is found to be powerful catalyst exhibiting up to two orders of magnitude larger current densities at 0.0 V and onset potential shifted for similar to 0.2 V to more negative value relative to Pt under steady-state condition.
PB  - Springer, New York
T2  - Electrocatalysis
T1  - High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation
VL  - 3
IS  - 3-4
SP  - 346
EP  - 352
DO  - 10.1007/s12678-012-0099-9
ER  - 

@article{
author = "Lović, Jelena and Obradović, Maja and Tripković, Dušan and Popović, Ksenija and Jovanović, Vladislava M. and Gojković, Snežana Lj. and Tripković, Amalija",
year = "2012",
abstract = "Formic acid oxidation was studied on a new prepared Pt2Bi characterized by X-ray diffraction spectroscopy (phase composition), scanning tunneling microscopy (STM) (surface morphology), and COads stripping voltammetry (surface composition). Bulk composition of Pt2Bi revealed two phases-55% PtBi alloy and 45% Pt. Estimated contribution of pure Pt on the Pt2Bi surface (43.5%) determined by COads stripping voltammetry corresponds closely to bulk composition. Pt2Bi reveals high activity and stability in formic acid oxidation. High activity originates from the fact that formic acid oxidation proceeds completely through dehydrogenation path based on an ensemble effect. The high stability of Pt2Bi surface is induced by the suppression of Bi leaching as it was evidenced by insignificant changes of surface morphology and surface roughness shown by STM images before and after electrochemical treatment in formic acid containing solution. Pt2Bi is found to be powerful catalyst exhibiting up to two orders of magnitude larger current densities at 0.0 V and onset potential shifted for similar to 0.2 V to more negative value relative to Pt under steady-state condition.",
publisher = "Springer, New York",
journal = "Electrocatalysis",
title = "High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation",
volume = "3",
number = "3-4",
pages = "346-352",
doi = "10.1007/s12678-012-0099-9"
}

Lović, J., Obradović, M., Tripković, D., Popović, K., Jovanović, V. M., Gojković, S. Lj.,& Tripković, A.. (2012). High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation. in Electrocatalysis
Springer, New York., 3(3-4), 346-352.
https://doi.org/10.1007/s12678-012-0099-9

Lović J, Obradović M, Tripković D, Popović K, Jovanović VM, Gojković SL, Tripković A. High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation. in Electrocatalysis. 2012;3(3-4):346-352.
doi:10.1007/s12678-012-0099-9 .

Lović, Jelena, Obradović, Maja, Tripković, Dušan, Popović, Ksenija, Jovanović, Vladislava M., Gojković, Snežana Lj., Tripković, Amalija, "High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation" in Electrocatalysis, 3, no. 3-4 (2012):346-352,
https://doi.org/10.1007/s12678-012-0099-9 . .

TY  - JOUR
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Rogan, Jelena R.
AU  - Popović, Ksenija
AU  - Lović, Jelena
AU  - Tripković, Amalija
AU  - Jovanović, Vladislava M.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1104
AB  - High surface area carbon-supported Pt, PtRh, and PtSn catalysts were synthesized by microwave-assisted polyol procedure and tested for ethanol oxidation in perchloric acid. The catalysts were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning tunnelling microscopy (STM), TEM, and EDX techniques. STM analysis of unsupported catalysts shows that small particles (similar to 2 nm) with a narrow size distribution are obtained. TEM and XRD examinations of supported catalysts revealed an increase in particle size upon deposition on carbon support (diameter similar to aEuro parts per thousand 3 nm). The diffraction peaks of the bimetallic catalysts in X-ray diffraction patterns are slightly shifted to lower (PtSn/C) or higher (PtRh/C) 2 theta values with respect to the corresponding peaks at Pt/C catalyst as a consequence of alloy formation. Oxidation of ethanol is significantly improved at PtSn/C with the onset potential shifted for similar to aEuro parts per thousand 150 mV to more negative values and the increase of activity for approximately three times in comparison to Pt/C catalyst. This is the lowest onset potential found for ethanol oxidation at PtSn catalysts with a similar composition. Chronoamperometric measurements confirmed that PtSn/C is notably less poisoned than Pt/C catalyst. PtRh/C catalyst exhibited mild enhancement of overall electrochemical reaction in comparison to Pt/C.
PB  - Springer, New York
T2  - Journal of Solid State Electrochemistry
T1  - Microwave-assisted polyol synthesis of carbon-supported platinum-based bimetallic catalysts for ethanol oxidation
VL  - 16
IS  - 10
SP  - 3147
EP  - 3157
DO  - 10.1007/s10008-012-1755-y
ER  - 

@article{
author = "Stevanović, Sanja and Tripković, Dušan and Rogan, Jelena R. and Popović, Ksenija and Lović, Jelena and Tripković, Amalija and Jovanović, Vladislava M.",
year = "2012",
abstract = "High surface area carbon-supported Pt, PtRh, and PtSn catalysts were synthesized by microwave-assisted polyol procedure and tested for ethanol oxidation in perchloric acid. The catalysts were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning tunnelling microscopy (STM), TEM, and EDX techniques. STM analysis of unsupported catalysts shows that small particles (similar to 2 nm) with a narrow size distribution are obtained. TEM and XRD examinations of supported catalysts revealed an increase in particle size upon deposition on carbon support (diameter similar to aEuro parts per thousand 3 nm). The diffraction peaks of the bimetallic catalysts in X-ray diffraction patterns are slightly shifted to lower (PtSn/C) or higher (PtRh/C) 2 theta values with respect to the corresponding peaks at Pt/C catalyst as a consequence of alloy formation. Oxidation of ethanol is significantly improved at PtSn/C with the onset potential shifted for similar to aEuro parts per thousand 150 mV to more negative values and the increase of activity for approximately three times in comparison to Pt/C catalyst. This is the lowest onset potential found for ethanol oxidation at PtSn catalysts with a similar composition. Chronoamperometric measurements confirmed that PtSn/C is notably less poisoned than Pt/C catalyst. PtRh/C catalyst exhibited mild enhancement of overall electrochemical reaction in comparison to Pt/C.",
publisher = "Springer, New York",
journal = "Journal of Solid State Electrochemistry",
title = "Microwave-assisted polyol synthesis of carbon-supported platinum-based bimetallic catalysts for ethanol oxidation",
volume = "16",
number = "10",
pages = "3147-3157",
doi = "10.1007/s10008-012-1755-y"
}

Stevanović, S., Tripković, D., Rogan, J. R., Popović, K., Lović, J., Tripković, A.,& Jovanović, V. M.. (2012). Microwave-assisted polyol synthesis of carbon-supported platinum-based bimetallic catalysts for ethanol oxidation. in Journal of Solid State Electrochemistry
Springer, New York., 16(10), 3147-3157.
https://doi.org/10.1007/s10008-012-1755-y

Stevanović S, Tripković D, Rogan JR, Popović K, Lović J, Tripković A, Jovanović VM. Microwave-assisted polyol synthesis of carbon-supported platinum-based bimetallic catalysts for ethanol oxidation. in Journal of Solid State Electrochemistry. 2012;16(10):3147-3157.
doi:10.1007/s10008-012-1755-y .

Stevanović, Sanja, Tripković, Dušan, Rogan, Jelena R., Popović, Ksenija, Lović, Jelena, Tripković, Amalija, Jovanović, Vladislava M., "Microwave-assisted polyol synthesis of carbon-supported platinum-based bimetallic catalysts for ethanol oxidation" in Journal of Solid State Electrochemistry, 16, no. 10 (2012):3147-3157,
https://doi.org/10.1007/s10008-012-1755-y . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Popović, Ksenija
AU  - Tripković, Amalija
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1085
AB  - The electrocatalytic activity of carbon supported PtRu/C catalysts, with different composition, toward the electrooxidation of methanol, CO and formic acid were examined in acid and alkaline solution at ambient temperature using the thin-film rotating disk electrode (RDE) method and compared with activity of Pt/C. The catalysts were characterized by XRD, AFM and STM techniques. XRD pattern revealed that PtRu-1/C catalyst is consisted of two structures e.g. Pt-Ru-fcc and Ru-hcp (the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru), as opposed to PtRu-2/C catalyst which is consisted of one structure mostly, Pt-Ru-fcc. According to STM images, PtRu as well as Pt, the particle sizes ranged between 2 and 6 nm, which is in a good agreement with the mean particles size determined by XRD. To establish the activity and stability of the catalysts potentiodynamic and quasi steady-state measurements were performed. It was found that the activity of Pt and PtRu for CO and methanol oxidation is a strong function of pH of solution. The kinetics are much faster in alkaline than in acid solution and the difference between Pt/C and PtRu/C is much less pronounced in alkaline media. The results presented in this work indicate that the activity of PtRu catalysts depends on catalyst composition, e.g., on the Pt/Ru atomic ratio, as well as on the alloying degree of catalysts. Comparison of CO, methanol and formic acid oxidation on PtRu-2/C, PtRu-1/C and Pt/C catalysts revealed that PtRu-2/C is the most active one. It was shown that the PtRu-2/C catalyst, due to fact that it consists of only one phase, with a high alloying degree, through the bifunctional mechanism improved by the electronic effect, achieved activity twice as high as PtRu-1/C in oxidation of all organic molecules investigated, and about three times higher than Pt/C in the oxidation of methanol and CO, and five times higher in formic acid oxidation.
AB  - Oksidacija metanola, mravlje kiseline i ugljen monoksida ispitivana je na nanočesticama različitih legura PtRu (PtRu/C), i dobijene aktivnosti su upoređene sa aktivnostima na nanostrukturnom platinskom katalizatoru (Pt/C). Katalizatori su okarakterisani difrakcijom X-zraka (XRD) i mikroskopskim tehnikama: mikroskopijom atomskih sila (AFM) i skenirajućom tunelirajućom mikroskopijom (STM). Elektrokatalitičke osobine svih katalizatora ispitivane su potenciodinamičkim i kvazi-stacionarnim merenjima u alkalnoj i kiseloj sredini. Pokazano je da su odgovarajuće elektrode za red veličine aktivnije u alkalnoj u odnosu na kiselu sredinu. Takođe, razlika u aktivnosti između Pt/C i obe PtRu/C elektrode je manje izražena u alkalnoj sredini. Rezultati elektrohemijskih merenja pokazali su da aktivnost katalizatora PtRu/C zavisi od sastava tj. određena je odgovarajućim Pt/Ru odnosom i stepenom legiranja. Tako je za oksidaciju malih organskih molekula elektroda PtRu-2/C aktivnija od PtRu-1/C. Prisustvo jedne faze u katalizatoru PtRu-2/C, veći stepen legiranja, više Pt/Ru parova čini da ovaj katalizator ima oko dva puta veću aktivnost u svim posmatranim reakcijama u odnosu na PtRu-1/C i oko tri puta u odnosu na Pt/C za oksidaciju metanola i CO, odnosno pet puta za oksidaciju mravlje kiseline.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - The electrocatalytic properties of carbon supported PtRu/C nanoalloys in oxidation of small organic molecules: Comparison with Pt/C catalyst
T1  - Elektrokatalitičke osobine nanočestica legura PtRu/C u oksidaciji malih organskih molekula - poređenje sa katalizatorom Pt/C
VL  - 66
IS  - 3
SP  - 335
EP  - 347
DO  - 10.2298/HEMIND111018104L
ER  - 

@article{
author = "Lović, Jelena and Popović, Ksenija and Tripković, Amalija",
year = "2012",
abstract = "The electrocatalytic activity of carbon supported PtRu/C catalysts, with different composition, toward the electrooxidation of methanol, CO and formic acid were examined in acid and alkaline solution at ambient temperature using the thin-film rotating disk electrode (RDE) method and compared with activity of Pt/C. The catalysts were characterized by XRD, AFM and STM techniques. XRD pattern revealed that PtRu-1/C catalyst is consisted of two structures e.g. Pt-Ru-fcc and Ru-hcp (the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru), as opposed to PtRu-2/C catalyst which is consisted of one structure mostly, Pt-Ru-fcc. According to STM images, PtRu as well as Pt, the particle sizes ranged between 2 and 6 nm, which is in a good agreement with the mean particles size determined by XRD. To establish the activity and stability of the catalysts potentiodynamic and quasi steady-state measurements were performed. It was found that the activity of Pt and PtRu for CO and methanol oxidation is a strong function of pH of solution. The kinetics are much faster in alkaline than in acid solution and the difference between Pt/C and PtRu/C is much less pronounced in alkaline media. The results presented in this work indicate that the activity of PtRu catalysts depends on catalyst composition, e.g., on the Pt/Ru atomic ratio, as well as on the alloying degree of catalysts. Comparison of CO, methanol and formic acid oxidation on PtRu-2/C, PtRu-1/C and Pt/C catalysts revealed that PtRu-2/C is the most active one. It was shown that the PtRu-2/C catalyst, due to fact that it consists of only one phase, with a high alloying degree, through the bifunctional mechanism improved by the electronic effect, achieved activity twice as high as PtRu-1/C in oxidation of all organic molecules investigated, and about three times higher than Pt/C in the oxidation of methanol and CO, and five times higher in formic acid oxidation., Oksidacija metanola, mravlje kiseline i ugljen monoksida ispitivana je na nanočesticama različitih legura PtRu (PtRu/C), i dobijene aktivnosti su upoređene sa aktivnostima na nanostrukturnom platinskom katalizatoru (Pt/C). Katalizatori su okarakterisani difrakcijom X-zraka (XRD) i mikroskopskim tehnikama: mikroskopijom atomskih sila (AFM) i skenirajućom tunelirajućom mikroskopijom (STM). Elektrokatalitičke osobine svih katalizatora ispitivane su potenciodinamičkim i kvazi-stacionarnim merenjima u alkalnoj i kiseloj sredini. Pokazano je da su odgovarajuće elektrode za red veličine aktivnije u alkalnoj u odnosu na kiselu sredinu. Takođe, razlika u aktivnosti između Pt/C i obe PtRu/C elektrode je manje izražena u alkalnoj sredini. Rezultati elektrohemijskih merenja pokazali su da aktivnost katalizatora PtRu/C zavisi od sastava tj. određena je odgovarajućim Pt/Ru odnosom i stepenom legiranja. Tako je za oksidaciju malih organskih molekula elektroda PtRu-2/C aktivnija od PtRu-1/C. Prisustvo jedne faze u katalizatoru PtRu-2/C, veći stepen legiranja, više Pt/Ru parova čini da ovaj katalizator ima oko dva puta veću aktivnost u svim posmatranim reakcijama u odnosu na PtRu-1/C i oko tri puta u odnosu na Pt/C za oksidaciju metanola i CO, odnosno pet puta za oksidaciju mravlje kiseline.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "The electrocatalytic properties of carbon supported PtRu/C nanoalloys in oxidation of small organic molecules: Comparison with Pt/C catalyst, Elektrokatalitičke osobine nanočestica legura PtRu/C u oksidaciji malih organskih molekula - poređenje sa katalizatorom Pt/C",
volume = "66",
number = "3",
pages = "335-347",
doi = "10.2298/HEMIND111018104L"
}

Lović, J., Popović, K.,& Tripković, A.. (2012). The electrocatalytic properties of carbon supported PtRu/C nanoalloys in oxidation of small organic molecules: Comparison with Pt/C catalyst. in Hemijska industrija
Association of Chemical Engineers of Serbia., 66(3), 335-347.
https://doi.org/10.2298/HEMIND111018104L

Lović J, Popović K, Tripković A. The electrocatalytic properties of carbon supported PtRu/C nanoalloys in oxidation of small organic molecules: Comparison with Pt/C catalyst. in Hemijska industrija. 2012;66(3):335-347.
doi:10.2298/HEMIND111018104L .

Lović, Jelena, Popović, Ksenija, Tripković, Amalija, "The electrocatalytic properties of carbon supported PtRu/C nanoalloys in oxidation of small organic molecules: Comparison with Pt/C catalyst" in Hemijska industrija, 66, no. 3 (2012):335-347,
https://doi.org/10.2298/HEMIND111018104L . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Tripković, Amalija
AU  - Popović, Ksenija
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/817
AB  - The oxidation of ethanol was studied at Snad-, Ruad- and Rhad-modified and unmodified PtC, Pt3Sn/C and Pt3Ru2/C catalysts. Potentiodynamic, quasi-steady-state and chronoamperometric measurements were used to investtigate the activity and stability of the catalysts. Irreversible adsorption of a small amount of each of the adatoms (≈10 % surface coverage) enhanced the activity of the Pt/C and Pt3Sn/C catalysts. The onset potential was shifted by ≈50 mV towards lower values and the current densities over the whole studied potential region were up to two times higher with respect to the unmodified catalysts. On the other hand, the addition of Snad or Rhad slightly increased the activity of Pt3Ru2/C, while the presence of Ruad decreased its activity for ethanol oxidation. The catalytic action of Snad and Ruad was associated mostly with their ability to adsorb oxygen-containing species at lower potentials than Pt, permitting a bifunctional mechanism to proceed. Rhad also acted on the C-C bond breaking activation as well as source of oxygen containing species, increasing in this way the activity of the modified surfaces for ethanol oxidation.
AB  - Oksidacija etanola je ispitivana na Pt/C, Pt3Sn/C i Pt3Ru2/C katalizatorima modifikovanim ireverizibilno adsorbovanim Snad, Ruad i Rhad adatomima. Njihova aktivnost i stabilnost ispitivana je potenciodinamičkim, hronoamperometrijskim i kvazi-stacionarnim merenjima. Dobijeni rezultati su pokazali da mala količina ireverzibilno adsorbovanih adatoma (10 %) povećava aktivnost Pt/C i Pt3Sn/C katalizatora. Početak reakcije je pomeren ka negativnijim vrednostima za ≈50 mV i dobijene su oko dva puta veće gustine struje u poređenju sa nemodifikovanim katalizatorima. Dodatak Snad ili Rhad malo povećava aktivnost Pt3Ru2/C katalizatora, dok dodatak Ruad smanjuje njegovu aktivnost za oksidaciju etanola. Katalitička aktivnost adatoma Sn i Ru se uglavnom vezuje sa njihovom sposobnošću da adsorbuju OH čestice na nižim potencijalima od Pt i na taj način poboljšavaju bifunkcionalni mehanizam reakcije. Povećana aktivnost katalizatora modifikovanih adatomima Rh može se objasniti lakšim kidanjem C-C veze u etanolu, kao i povećanom količinom OHad čestica na Rh mestima.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Impact of the modification of carbon-supported, Pt-based catalysts by irreversibly adsorbed Sn, Ru and Rh on ethanol oxidation
T1  - Uticaj modifikacije platinskih nanokatalizatora ireverzibilnom adsorpcijom Sn, Ru i Rh na oksidaciju etanola
VL  - 76
IS  - 11
SP  - 1523
EP  - 1536
DO  - 10.2298/JSC110217136L
ER  - 

@article{
author = "Lović, Jelena and Tripković, Amalija and Popović, Ksenija",
year = "2011",
abstract = "The oxidation of ethanol was studied at Snad-, Ruad- and Rhad-modified and unmodified PtC, Pt3Sn/C and Pt3Ru2/C catalysts. Potentiodynamic, quasi-steady-state and chronoamperometric measurements were used to investtigate the activity and stability of the catalysts. Irreversible adsorption of a small amount of each of the adatoms (≈10 % surface coverage) enhanced the activity of the Pt/C and Pt3Sn/C catalysts. The onset potential was shifted by ≈50 mV towards lower values and the current densities over the whole studied potential region were up to two times higher with respect to the unmodified catalysts. On the other hand, the addition of Snad or Rhad slightly increased the activity of Pt3Ru2/C, while the presence of Ruad decreased its activity for ethanol oxidation. The catalytic action of Snad and Ruad was associated mostly with their ability to adsorb oxygen-containing species at lower potentials than Pt, permitting a bifunctional mechanism to proceed. Rhad also acted on the C-C bond breaking activation as well as source of oxygen containing species, increasing in this way the activity of the modified surfaces for ethanol oxidation., Oksidacija etanola je ispitivana na Pt/C, Pt3Sn/C i Pt3Ru2/C katalizatorima modifikovanim ireverizibilno adsorbovanim Snad, Ruad i Rhad adatomima. Njihova aktivnost i stabilnost ispitivana je potenciodinamičkim, hronoamperometrijskim i kvazi-stacionarnim merenjima. Dobijeni rezultati su pokazali da mala količina ireverzibilno adsorbovanih adatoma (10 %) povećava aktivnost Pt/C i Pt3Sn/C katalizatora. Početak reakcije je pomeren ka negativnijim vrednostima za ≈50 mV i dobijene su oko dva puta veće gustine struje u poređenju sa nemodifikovanim katalizatorima. Dodatak Snad ili Rhad malo povećava aktivnost Pt3Ru2/C katalizatora, dok dodatak Ruad smanjuje njegovu aktivnost za oksidaciju etanola. Katalitička aktivnost adatoma Sn i Ru se uglavnom vezuje sa njihovom sposobnošću da adsorbuju OH čestice na nižim potencijalima od Pt i na taj način poboljšavaju bifunkcionalni mehanizam reakcije. Povećana aktivnost katalizatora modifikovanih adatomima Rh može se objasniti lakšim kidanjem C-C veze u etanolu, kao i povećanom količinom OHad čestica na Rh mestima.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Impact of the modification of carbon-supported, Pt-based catalysts by irreversibly adsorbed Sn, Ru and Rh on ethanol oxidation, Uticaj modifikacije platinskih nanokatalizatora ireverzibilnom adsorpcijom Sn, Ru i Rh na oksidaciju etanola",
volume = "76",
number = "11",
pages = "1523-1536",
doi = "10.2298/JSC110217136L"
}

Lović, J., Tripković, A.,& Popović, K.. (2011). Impact of the modification of carbon-supported, Pt-based catalysts by irreversibly adsorbed Sn, Ru and Rh on ethanol oxidation. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 76(11), 1523-1536.
https://doi.org/10.2298/JSC110217136L

Lović J, Tripković A, Popović K. Impact of the modification of carbon-supported, Pt-based catalysts by irreversibly adsorbed Sn, Ru and Rh on ethanol oxidation. in Journal of the Serbian Chemical Society. 2011;76(11):1523-1536.
doi:10.2298/JSC110217136L .

Lović, Jelena, Tripković, Amalija, Popović, Ksenija, "Impact of the modification of carbon-supported, Pt-based catalysts by irreversibly adsorbed Sn, Ru and Rh on ethanol oxidation" in Journal of the Serbian Chemical Society, 76, no. 11 (2011):1523-1536,
https://doi.org/10.2298/JSC110217136L . .

TY  - JOUR
AU  - Tripković, Amalija
AU  - Lović, Jelena
AU  - Popović, Ksenija
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/685
AB  - The activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (≈25%) and RuUPD (≈40%) in the oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD analysis. To establish the activity and stability of the catalysts, potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD-or RuUPD-modified Pt/C catalysts. The electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts were less active than the corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD-modified Pt/C than between Pt3Ru2/C and RuUPD-modified Pt/C is caused by the electronic effect in Pt3Sn/C. The high activity of Pt3Sn/C modified with a small amount of SnUPD (≈10%) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of the SnUPD, with an enhanced amount of oxygen- containing species on the Sn sites, resulting finally in a reinforcement of the bifunctional mechanism.
AB  - Aktivnost dve legure, Pt3Sn/C i Pt3Ru2/C, upoređene su sa aktivnostima Pt/C modifikovanim odgovarajućim količinama SnUPD (≈ 25%) ili RuUPD (≈ 40%) u reakciji oksidacije etanola. Katalizatori su okarakterisani difrakcijom X-zraka (XRD) i određen je stepen legiranja. Njihova aktivnost i stabilnost ispitivana je potenciodinamičkim, kvazi-stacionarnim i hronoamperometrijskim merenjima. Dobijeni rezultati su pokazali da su obe legure aktivnije od SnUPD i RuUPD modifikovanog Pt/C katalizatora. Aktivnost Pt3Sn/C katalizatora određena je značajnim elektronskim efektom, što je i glavni razlog njegove veće aktivnosti u odnosu na Pt3Ru2/C. Odsustvo elektronskog efekta kod SnUPD i RuUPD modifikovanog Pt/C katalizatora čini ove elektrode manje aktivnim od odgovarajućih legura, tj. od Pt3Sn/C i Pt3Ru2/C. Veća razlika u aktivnosti između Pt3Sn/C i SnUPD modifikovanog Pt/C katalizatora nego između Pt3Ru2/C i RuUPD modifikovanog Pt/C katalizatora izazvana je elektronskim efektom u Pt3Sn/C katalizatoru. Velika aktivnost Pt3Sn/C katalizatora modifikovanog malom količinom SnUPD (≈ 10 %) može se objasniti kombinacijom elektronskog efekta, tj. slabijom vezom adsorbata na Pt mestima i većom mobilnošću SnUPD, i povećanom količinom OHad čestica na Sn mestima, što kao krajnji rezultat ima poboljšanje bifunkcionalnog mehanizma reakcije.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Comparative study of ethanol oxidation at Pt-based nanoalloys and UPD-modified pt nanoparticles
T1  - Uporedno ispitivanje oksidacije etanola na platinskim nanolegurama i Pt nanočesticama modifikovanim podpotencijalnom depozicijom
VL  - 75
IS  - 11
SP  - 1559
EP  - 1574
DO  - 10.2298/JSC100519093T
ER  - 

@article{
author = "Tripković, Amalija and Lović, Jelena and Popović, Ksenija",
year = "2010",
abstract = "The activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (≈25%) and RuUPD (≈40%) in the oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD analysis. To establish the activity and stability of the catalysts, potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD-or RuUPD-modified Pt/C catalysts. The electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts were less active than the corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD-modified Pt/C than between Pt3Ru2/C and RuUPD-modified Pt/C is caused by the electronic effect in Pt3Sn/C. The high activity of Pt3Sn/C modified with a small amount of SnUPD (≈10%) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of the SnUPD, with an enhanced amount of oxygen- containing species on the Sn sites, resulting finally in a reinforcement of the bifunctional mechanism., Aktivnost dve legure, Pt3Sn/C i Pt3Ru2/C, upoređene su sa aktivnostima Pt/C modifikovanim odgovarajućim količinama SnUPD (≈ 25%) ili RuUPD (≈ 40%) u reakciji oksidacije etanola. Katalizatori su okarakterisani difrakcijom X-zraka (XRD) i određen je stepen legiranja. Njihova aktivnost i stabilnost ispitivana je potenciodinamičkim, kvazi-stacionarnim i hronoamperometrijskim merenjima. Dobijeni rezultati su pokazali da su obe legure aktivnije od SnUPD i RuUPD modifikovanog Pt/C katalizatora. Aktivnost Pt3Sn/C katalizatora određena je značajnim elektronskim efektom, što je i glavni razlog njegove veće aktivnosti u odnosu na Pt3Ru2/C. Odsustvo elektronskog efekta kod SnUPD i RuUPD modifikovanog Pt/C katalizatora čini ove elektrode manje aktivnim od odgovarajućih legura, tj. od Pt3Sn/C i Pt3Ru2/C. Veća razlika u aktivnosti između Pt3Sn/C i SnUPD modifikovanog Pt/C katalizatora nego između Pt3Ru2/C i RuUPD modifikovanog Pt/C katalizatora izazvana je elektronskim efektom u Pt3Sn/C katalizatoru. Velika aktivnost Pt3Sn/C katalizatora modifikovanog malom količinom SnUPD (≈ 10 %) može se objasniti kombinacijom elektronskog efekta, tj. slabijom vezom adsorbata na Pt mestima i većom mobilnošću SnUPD, i povećanom količinom OHad čestica na Sn mestima, što kao krajnji rezultat ima poboljšanje bifunkcionalnog mehanizma reakcije.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Comparative study of ethanol oxidation at Pt-based nanoalloys and UPD-modified pt nanoparticles, Uporedno ispitivanje oksidacije etanola na platinskim nanolegurama i Pt nanočesticama modifikovanim podpotencijalnom depozicijom",
volume = "75",
number = "11",
pages = "1559-1574",
doi = "10.2298/JSC100519093T"
}

Tripković, A., Lović, J.,& Popović, K.. (2010). Comparative study of ethanol oxidation at Pt-based nanoalloys and UPD-modified pt nanoparticles. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 75(11), 1559-1574.
https://doi.org/10.2298/JSC100519093T

Tripković A, Lović J, Popović K. Comparative study of ethanol oxidation at Pt-based nanoalloys and UPD-modified pt nanoparticles. in Journal of the Serbian Chemical Society. 2010;75(11):1559-1574.
doi:10.2298/JSC100519093T .

Tripković, Amalija, Lović, Jelena, Popović, Ksenija, "Comparative study of ethanol oxidation at Pt-based nanoalloys and UPD-modified pt nanoparticles" in Journal of the Serbian Chemical Society, 75, no. 11 (2010):1559-1574,
https://doi.org/10.2298/JSC100519093T . .

TY  - CONF
AU  - Lović, Jelena
AU  - Popović, Ksenija
AU  - Tripković, Amalija
PY  - 2010
UR  - http://www.aseee.eu/index.php/rsesee2-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3524
AB  - Oxidation of ethanol was studied at SnUPD, RuUPD and RhUPD modified and unmodified Pt/C, Pt3Sn/C and Pt3Ru2/C catalysts. All unmodified catalysts were characterized by XRD. Potentiodynamic and chronoamperometric measurements were used to establish their catalytic activity for ethanol oxidation. Underpotential deposition of small amount of each one adatoms (~10%) enhanced the activity of Pt/C and Pt3Sn/C catalysts. The onset potential is shifted for ~0.05 V towards lower values and the current densities in the whole potential region studied are up to two times higher regarding to unmodified catalysts. On the other hand, addition of SnUPD or RhUPD slightly increases the activity of Pt3Ru2/C, while the presence of Ruad adlayer decreases its activity for ethanol oxidation. Catalytic action of Sn and Ru adatoms was associated mostly with their ability to adsorb oxygen containing species at lower potentials than Pt, permitting bifunctional mechanism to proceed. Rh adatoms act on the C-C bond breaking activation increasing in this way the activity of modified surfaces for the ethanol oxidation. Pt3Sn/C modified by ~10% SnUPD is the best catalyst studied. Its activity enhanced more than two times in respect to Pt3Sn/C catalyst.
PB  - Serbian Chemical Society, Belgrade
C3  - Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
T1  - Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts
SP  - 61
EP  - 61
UR  - https://hdl.handle.net/21.15107/rcub_cer_3524
ER  - 

@conference{
author = "Lović, Jelena and Popović, Ksenija and Tripković, Amalija",
year = "2010",
abstract = "Oxidation of ethanol was studied at SnUPD, RuUPD and RhUPD modified and unmodified Pt/C, Pt3Sn/C and Pt3Ru2/C catalysts. All unmodified catalysts were characterized by XRD. Potentiodynamic and chronoamperometric measurements were used to establish their catalytic activity for ethanol oxidation. Underpotential deposition of small amount of each one adatoms (~10%) enhanced the activity of Pt/C and Pt3Sn/C catalysts. The onset potential is shifted for ~0.05 V towards lower values and the current densities in the whole potential region studied are up to two times higher regarding to unmodified catalysts. On the other hand, addition of SnUPD or RhUPD slightly increases the activity of Pt3Ru2/C, while the presence of Ruad adlayer decreases its activity for ethanol oxidation. Catalytic action of Sn and Ru adatoms was associated mostly with their ability to adsorb oxygen containing species at lower potentials than Pt, permitting bifunctional mechanism to proceed. Rh adatoms act on the C-C bond breaking activation increasing in this way the activity of modified surfaces for the ethanol oxidation. Pt3Sn/C modified by ~10% SnUPD is the best catalyst studied. Its activity enhanced more than two times in respect to Pt3Sn/C catalyst.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts",
title = "Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts",
pages = "61-61",
url = "https://hdl.handle.net/21.15107/rcub_cer_3524"
}

Lović, J., Popović, K.,& Tripković, A.. (2010). Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
Serbian Chemical Society, Belgrade., 61-61.
https://hdl.handle.net/21.15107/rcub_cer_3524

Lović J, Popović K, Tripković A. Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2010;:61-61.
https://hdl.handle.net/21.15107/rcub_cer_3524 .

Lović, Jelena, Popović, Ksenija, Tripković, Amalija, "Effects of UPD adlayer of foreign metals on the oxidation of ethanol on carbon supported Pt-based catalysts" in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2010):61-61,
https://hdl.handle.net/21.15107/rcub_cer_3524 .

TY  - CONF
AU  - Tripković, Amalija
AU  - Lović, Jelena
AU  - Popović, Ksenija
PY  - 2010
UR  - http://www.aseee.eu/index.php/rsesee2-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3532
AB  - Activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (~25 %) and RuUPD (~40 %) in overall oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD. To establish the activity and stability of the catalysts potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD or RuUPD modified Pt/C catalysts. Electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts are less active than corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD modified Pt/C than between Pt3Ru2/C and RuUPD modified Pt/C is caused by electronic effect in Pt3Sn/C. High activity of Pt3Sn/C modified with small amount of SnUPD (~10%) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of SnUPD, with enhanced amount of oxygen-containing species on Sn sites resulting finally in reinforcement of bifunctional mechanism.
PB  - Serbian Chemical Society, Belgrade
C3  - Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
T1  - Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts
SP  - 139
EP  - 139
UR  - https://hdl.handle.net/21.15107/rcub_cer_3532
ER  - 

@conference{
author = "Tripković, Amalija and Lović, Jelena and Popović, Ksenija",
year = "2010",
abstract = "Activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (~25 %) and RuUPD (~40 %) in overall oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD. To establish the activity and stability of the catalysts potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD or RuUPD modified Pt/C catalysts. Electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts are less active than corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD modified Pt/C than between Pt3Ru2/C and RuUPD modified Pt/C is caused by electronic effect in Pt3Sn/C. High activity of Pt3Sn/C modified with small amount of SnUPD (~10%) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of SnUPD, with enhanced amount of oxygen-containing species on Sn sites resulting finally in reinforcement of bifunctional mechanism.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts",
title = "Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts",
pages = "139-139",
url = "https://hdl.handle.net/21.15107/rcub_cer_3532"
}

Tripković, A., Lović, J.,& Popović, K.. (2010). Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
Serbian Chemical Society, Belgrade., 139-139.
https://hdl.handle.net/21.15107/rcub_cer_3532

Tripković A, Lović J, Popović K. Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2010;:139-139.
https://hdl.handle.net/21.15107/rcub_cer_3532 .

Tripković, Amalija, Lović, Jelena, Popović, Ksenija, "Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts" in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2010):139-139,
https://hdl.handle.net/21.15107/rcub_cer_3532 .

TY  - CONF
AU  - Lović, Jelena
AU  - Tripković, Amalija
AU  - Popović, Ksenija
PY  - 2010
UR  - http://www.aseee.eu/index.php/rsesee2-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3533
AB  - Activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (~25 %) and RuUPD (~40 %) in overall oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD. To establish the activity and stability of the catalysts potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD or RuUPD modified Pt/C catalysts. Electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts are less active than corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD modified Pt/C than between Pt3Ru2/C and RuUPD modified Pt/C is caused by electronic effect in Pt3Sn/C. High activity of Pt3Sn/C modified with small amount of SnUPD (~10%) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of SnUPD, with enhanced amount of oxygen-containing species on Sn sites resulting finally in reinforcement of bifunctional mechanism.
PB  - Serbian Chemical Society, Belgrade
C3  - Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings
T1  - Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts
SP  - 207
EP  - 210
UR  - https://hdl.handle.net/21.15107/rcub_cer_3533
ER  - 

@conference{
author = "Lović, Jelena and Tripković, Amalija and Popović, Ksenija",
year = "2010",
abstract = "Activity of two alloys, Pt3Sn/C and Pt3Ru2/C, was compared with the activity of Pt/C modified with corresponding amounts of SnUPD (~25 %) and RuUPD (~40 %) in overall oxidation of ethanol. Pt3Sn/C, Pt3Ru2/C and Pt/C catalysts were characterized by XRD. To establish the activity and stability of the catalysts potentiodynamic, quasi steady-state and chronoamperometric measurements were performed. Both alloys are more active than SnUPD or RuUPD modified Pt/C catalysts. Electronic effect determining dominantly the activity of Pt3Sn/C is the main reason for its higher activity compared to Pt3Ru2/C. Since SnUPD and RuUPD do not provoke any significant modification of electronic environment, both modified Pt/C catalysts are less active than corresponding alloys. More pronounced difference in activity between Pt3Sn/C and SnUPD modified Pt/C than between Pt3Ru2/C and RuUPD modified Pt/C is caused by electronic effect in Pt3Sn/C. High activity of Pt3Sn/C modified with small amount of SnUPD (~10%) can be explained by combining the electronic effect, causing less strongly bonded adsorbate on Pt sites and easier mobility of SnUPD, with enhanced amount of oxygen-containing species on Sn sites resulting finally in reinforcement of bifunctional mechanism.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings",
title = "Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts",
pages = "207-210",
url = "https://hdl.handle.net/21.15107/rcub_cer_3533"
}

Lović, J., Tripković, A.,& Popović, K.. (2010). Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings
Serbian Chemical Society, Belgrade., 207-210.
https://hdl.handle.net/21.15107/rcub_cer_3533

Lović J, Tripković A, Popović K. Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts. in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings. 2010;:207-210.
https://hdl.handle.net/21.15107/rcub_cer_3533 .

Lović, Jelena, Tripković, Amalija, Popović, Ksenija, "Ethanol oxidation at Pt-based alloys and UPD modified Pt/C catalysts" in Second Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Proceedings (2010):207-210,
https://hdl.handle.net/21.15107/rcub_cer_3533 .

TY  - JOUR
AU  - Tripković, Amalija
AU  - Popović, Ksenija
AU  - Lović, Jelena
AU  - Jovanović, Vladislava M.
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Kowal, Andrzej
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/532
AB  - Oxidation of ethanol was studied at Sn-ad modified and unmodified Pt3Sn/C and Pt/C catalysts. Pt3Sn/C and Pt/C catalysts were characterized by XRD. Potentiodynamic and chronoamperometric measurements were used to establish catalytic activity and stability. High activity achieved at Sn-ad modified Pt3Sn/C catalyst has not been observed at any bimetallic catalyst so far. Promotional effect of Sn-ad on the ethanol oxidation was related to the enhancement of CO oxidation rate in bifunctional mechanism. It was shown that electrodeposited Sn exhibited different effect on the catalytic activity compared to Sn in alloy.
PB  - Elsevier Science Inc, New York
T2  - Electrochemistry Communications
T1  - Promotional effect of Sn-ad on the ethanol oxidation at Pt3Sn/C catalyst
VL  - 11
IS  - 5
SP  - 1030
EP  - 1033
DO  - 10.1016/j.elecom.2009.03.004
ER  - 

@article{
author = "Tripković, Amalija and Popović, Ksenija and Lović, Jelena and Jovanović, Vladislava M. and Stevanović, Sanja and Tripković, Dušan and Kowal, Andrzej",
year = "2009",
abstract = "Oxidation of ethanol was studied at Sn-ad modified and unmodified Pt3Sn/C and Pt/C catalysts. Pt3Sn/C and Pt/C catalysts were characterized by XRD. Potentiodynamic and chronoamperometric measurements were used to establish catalytic activity and stability. High activity achieved at Sn-ad modified Pt3Sn/C catalyst has not been observed at any bimetallic catalyst so far. Promotional effect of Sn-ad on the ethanol oxidation was related to the enhancement of CO oxidation rate in bifunctional mechanism. It was shown that electrodeposited Sn exhibited different effect on the catalytic activity compared to Sn in alloy.",
publisher = "Elsevier Science Inc, New York",
journal = "Electrochemistry Communications",
title = "Promotional effect of Sn-ad on the ethanol oxidation at Pt3Sn/C catalyst",
volume = "11",
number = "5",
pages = "1030-1033",
doi = "10.1016/j.elecom.2009.03.004"
}

Tripković, A., Popović, K., Lović, J., Jovanović, V. M., Stevanović, S., Tripković, D.,& Kowal, A.. (2009). Promotional effect of Sn-ad on the ethanol oxidation at Pt3Sn/C catalyst. in Electrochemistry Communications
Elsevier Science Inc, New York., 11(5), 1030-1033.
https://doi.org/10.1016/j.elecom.2009.03.004

Tripković A, Popović K, Lović J, Jovanović VM, Stevanović S, Tripković D, Kowal A. Promotional effect of Sn-ad on the ethanol oxidation at Pt3Sn/C catalyst. in Electrochemistry Communications. 2009;11(5):1030-1033.
doi:10.1016/j.elecom.2009.03.004 .

Tripković, Amalija, Popović, Ksenija, Lović, Jelena, Jovanović, Vladislava M., Stevanović, Sanja, Tripković, Dušan, Kowal, Andrzej, "Promotional effect of Sn-ad on the ethanol oxidation at Pt3Sn/C catalyst" in Electrochemistry Communications, 11, no. 5 (2009):1030-1033,
https://doi.org/10.1016/j.elecom.2009.03.004 . .

TY  - JOUR
AU  - Popović, Ksenija
AU  - Lović, Jelena
AU  - Tripković, Amalija
AU  - Olszewski, Piotr K.
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/513
AB  - The electrocatalytic activity of Pt3Ru2/C nanocatalyst toward the electro-oxidation of bulk CO was examined in acid and alkaline solution at ambient temperature using the thin-film, rotating disk electrode (RDE) method. The catalyst was characterized by XRD analysis. The XRD pattern revealed that the Pt3Ru2/C catalyst consisted of two structures, i.e., Pt-Ru-fcc and Ruhcp (a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru). Electrocatalytic activities were measured by applying potentiodynamic and steady state techniques. The oxidation of CO on the Pt3Ru2/C catalyst was influenced by pH and anions from the supporting electrolytes. The Pt3Ru2/C was more active in alkaline than in acid solution, as well as in perchloric than in sulfuric acid. Comparison of CO oxidation on Pt3Ru2/C and Pt/C revealed that the Pt3Ru2/C was more active than Pt/C in acid solution, while both catalysts had a similar activity in alkaline solution.
AB  - Elektrohemijska oksidacija CO ispitivana je na nanokatalizatoru Pt3Ru2 dispergovanom na aktivnom uglju kao nosaču u kiseloj i alkalnoj sredini na sobnoj temperaturi korišćenjem metode rotirajuće disk elektrode (RDE). Katalizator je okarakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt3Ru2 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Elektrokatalitička aktivnost ovog katalizatora za oksidaciju CO je ispitivana cik- ličnom voltametrijom i pokazan je efekat pH i efekat anjona iz nosećeg elektrolita. Pt3Ru2/C katalizator je aktivniji u alkalnoj nego u kiseloj sredini, ukazujući na činjenicu da u alkaliji Pt može da adsorbuje OH čestice na isto tako niskim potencijalima kao i Ru i na taj način ubrzava reakciju oksidacije CO u poređenju sa kiselinom. Pokazano je da adsorpcija bisulfatnih anjona iz nosećeg elektrolita pomera početni potencijal reakcije ka pozitivnijim vrednostima i smanjuje brzinu oksidacije CO. Poređenjem aktivnosti Pt/C i Pt3Ru2/C katalizatora u oksidaciji CO u kiseloj i alkalnij sredini pokazano je da je ta razlika znatno manja u alkalnoj nego u kiseloj sredini.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation
T1  - Aktivnost Pt3Ru2/C nanokatalizatora u oksidaciji CO
VL  - 74
IS  - 8-9
SP  - 965
EP  - 975
DO  - 10.2298/JSC0909965P
ER  - 

@article{
author = "Popović, Ksenija and Lović, Jelena and Tripković, Amalija and Olszewski, Piotr K.",
year = "2009",
abstract = "The electrocatalytic activity of Pt3Ru2/C nanocatalyst toward the electro-oxidation of bulk CO was examined in acid and alkaline solution at ambient temperature using the thin-film, rotating disk electrode (RDE) method. The catalyst was characterized by XRD analysis. The XRD pattern revealed that the Pt3Ru2/C catalyst consisted of two structures, i.e., Pt-Ru-fcc and Ruhcp (a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru). Electrocatalytic activities were measured by applying potentiodynamic and steady state techniques. The oxidation of CO on the Pt3Ru2/C catalyst was influenced by pH and anions from the supporting electrolytes. The Pt3Ru2/C was more active in alkaline than in acid solution, as well as in perchloric than in sulfuric acid. Comparison of CO oxidation on Pt3Ru2/C and Pt/C revealed that the Pt3Ru2/C was more active than Pt/C in acid solution, while both catalysts had a similar activity in alkaline solution., Elektrohemijska oksidacija CO ispitivana je na nanokatalizatoru Pt3Ru2 dispergovanom na aktivnom uglju kao nosaču u kiseloj i alkalnoj sredini na sobnoj temperaturi korišćenjem metode rotirajuće disk elektrode (RDE). Katalizator je okarakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt3Ru2 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Elektrokatalitička aktivnost ovog katalizatora za oksidaciju CO je ispitivana cik- ličnom voltametrijom i pokazan je efekat pH i efekat anjona iz nosećeg elektrolita. Pt3Ru2/C katalizator je aktivniji u alkalnoj nego u kiseloj sredini, ukazujući na činjenicu da u alkaliji Pt može da adsorbuje OH čestice na isto tako niskim potencijalima kao i Ru i na taj način ubrzava reakciju oksidacije CO u poređenju sa kiselinom. Pokazano je da adsorpcija bisulfatnih anjona iz nosećeg elektrolita pomera početni potencijal reakcije ka pozitivnijim vrednostima i smanjuje brzinu oksidacije CO. Poređenjem aktivnosti Pt/C i Pt3Ru2/C katalizatora u oksidaciji CO u kiseloj i alkalnij sredini pokazano je da je ta razlika znatno manja u alkalnoj nego u kiseloj sredini.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation, Aktivnost Pt3Ru2/C nanokatalizatora u oksidaciji CO",
volume = "74",
number = "8-9",
pages = "965-975",
doi = "10.2298/JSC0909965P"
}

Popović, K., Lović, J., Tripković, A.,& Olszewski, P. K.. (2009). Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 74(8-9), 965-975.
https://doi.org/10.2298/JSC0909965P

Popović K, Lović J, Tripković A, Olszewski PK. Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation. in Journal of the Serbian Chemical Society. 2009;74(8-9):965-975.
doi:10.2298/JSC0909965P .

Popović, Ksenija, Lović, Jelena, Tripković, Amalija, Olszewski, Piotr K., "Activity of carbon supported Pt3Ru2 nanocatalyst in CO oxidation" in Journal of the Serbian Chemical Society, 74, no. 8-9 (2009):965-975,
https://doi.org/10.2298/JSC0909965P . .

TY  - JOUR
AU  - Tripković, Amalija
AU  - Gojković, Snežana Lj.
AU  - Popović, Ksenija
AU  - Lović, Jelena
AU  - Kowal, Andrzej
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2881
AB  - Electrochemical oxidation of HCOOH in H2SO4 and HClO4 solutions was examined on thin film Pt2Ru3/C electrode. XRD pattern revealed that Pt2Ru3 alloy consisted of the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru. According to STM images, Pt2Ru3 particles size was between 2 and 6 nm. It was established that electrochemical oxidation of HCOOH commenced at −0.1 V versus SCE at Pt sites in the catalyst. Kinetic parameters indicated that dehydrogenation path was predominant. Dehydration occurs in parallel, but without significant poisoning by COad owing to oxidative removal by OH species on Ru atoms. The coverage of Pt2Ru3 surface by CO preadsorbed from the solution was found to be 24% lower when the surface was modified by irreversibly adsorbed Bi. Modification by Bi also shifted the onset potential for HCOOH oxidation for about 50 mV towards more negative values and consequently, increased the reaction rate for a factor of two. It was proposed that Ru acts through bifunctional mechanism, i.e. OH species adsorbed on Ru oxidizes COad from Pt sites, while Bi hinders the adsorption of CO on Pt sites via electronic and/or ensemble effects.
PB  - Elsevier
T2  - Electrochimica Acta
T1  - Study of the kinetics and influence of Bi_irr on formic acid oxidation at Pt2Ru3/C
VL  - 53
SP  - 887
EP  - 893
DO  - 10.1016/j.electacta.2007.07.073
ER  - 

@article{
author = "Tripković, Amalija and Gojković, Snežana Lj. and Popović, Ksenija and Lović, Jelena and Kowal, Andrzej",
year = "2007",
abstract = "Electrochemical oxidation of HCOOH in H2SO4 and HClO4 solutions was examined on thin film Pt2Ru3/C electrode. XRD pattern revealed that Pt2Ru3 alloy consisted of the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru. According to STM images, Pt2Ru3 particles size was between 2 and 6 nm. It was established that electrochemical oxidation of HCOOH commenced at −0.1 V versus SCE at Pt sites in the catalyst. Kinetic parameters indicated that dehydrogenation path was predominant. Dehydration occurs in parallel, but without significant poisoning by COad owing to oxidative removal by OH species on Ru atoms. The coverage of Pt2Ru3 surface by CO preadsorbed from the solution was found to be 24% lower when the surface was modified by irreversibly adsorbed Bi. Modification by Bi also shifted the onset potential for HCOOH oxidation for about 50 mV towards more negative values and consequently, increased the reaction rate for a factor of two. It was proposed that Ru acts through bifunctional mechanism, i.e. OH species adsorbed on Ru oxidizes COad from Pt sites, while Bi hinders the adsorption of CO on Pt sites via electronic and/or ensemble effects.",
publisher = "Elsevier",
journal = "Electrochimica Acta",
title = "Study of the kinetics and influence of Bi_irr on formic acid oxidation at Pt2Ru3/C",
volume = "53",
pages = "887-893",
doi = "10.1016/j.electacta.2007.07.073"
}

Tripković, A., Gojković, S. Lj., Popović, K., Lović, J.,& Kowal, A.. (2007). Study of the kinetics and influence of Bi_irr on formic acid oxidation at Pt2Ru3/C. in Electrochimica Acta
Elsevier., 53, 887-893.
https://doi.org/10.1016/j.electacta.2007.07.073

Tripković A, Gojković SL, Popović K, Lović J, Kowal A. Study of the kinetics and influence of Bi_irr on formic acid oxidation at Pt2Ru3/C. in Electrochimica Acta. 2007;53:887-893.
doi:10.1016/j.electacta.2007.07.073 .

Tripković, Amalija, Gojković, Snežana Lj., Popović, Ksenija, Lović, Jelena, Kowal, Andrzej, "Study of the kinetics and influence of Bi_irr on formic acid oxidation at Pt2Ru3/C" in Electrochimica Acta, 53 (2007):887-893,
https://doi.org/10.1016/j.electacta.2007.07.073 . .

TY  - JOUR
AU  - Tripković, Amalija
AU  - Popović, Ksenija
AU  - Lović, Jelena
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/290
AB  - The electrochemical oxidation of methanol in NaOH solution was examined on a thin film Pt2Ru3/C electrode. The XRD pattern revealed that the Pt2Ru3 alloy consisted of a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru. It was shown that in alkaline solution, the difference in activity between Pt/C and Pt2Ru3/C is significantly smaller than in acid solution. It is proposed that the reaction follows a quasi bifunctional mechanism. The kinetic parameters indicated that the chemical reaction between adsorbed COad and OHad species could be the rate limiting step.
AB  - Elektrohemijska oksidacija metanola ispitivana je na nanokatalizatoru Pt2Ru3 dispergovanom na aktivnom uglju kao nosaču u alkalnoj sredini. Katalizator je karakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt2Ru3 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Poređenjem aktivnosti Pt/C i Pt2Ru3/C katalizatora u oksidaciji metanola u alkalnoj sredini, pokazano je da je ta razlika znatno manja nego u kiseloj sredini. Predložen je kvazi-bifunkcionalni mehanizam reakcije. Dobijeni kinetički parametri ukazuju na to da je hemijska reakcija između adsorbovanih COad i OHad čestica spori stupanj u oksidaciji metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media
T1  - Kinetika oksidacije metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini
VL  - 72
IS  - 11
SP  - 1095
EP  - 1101
DO  - 10.2298/JSC0711095T
ER  - 

@article{
author = "Tripković, Amalija and Popović, Ksenija and Lović, Jelena",
year = "2007",
abstract = "The electrochemical oxidation of methanol in NaOH solution was examined on a thin film Pt2Ru3/C electrode. The XRD pattern revealed that the Pt2Ru3 alloy consisted of a solid solution of Ru in Pt and a small amount of Ru or a solid solution of Pt in Ru. It was shown that in alkaline solution, the difference in activity between Pt/C and Pt2Ru3/C is significantly smaller than in acid solution. It is proposed that the reaction follows a quasi bifunctional mechanism. The kinetic parameters indicated that the chemical reaction between adsorbed COad and OHad species could be the rate limiting step., Elektrohemijska oksidacija metanola ispitivana je na nanokatalizatoru Pt2Ru3 dispergovanom na aktivnom uglju kao nosaču u alkalnoj sredini. Katalizator je karakterisan difrakcijom X-zraka (XRD) i dobijeni rezultati su pokazali da se legura Pt2Ru3 sastoji od dve faze: čvrstog rastvora Ru u Pt i od malih količina čistog Ru ili čvrstog rastvora Pt u Ru. Poređenjem aktivnosti Pt/C i Pt2Ru3/C katalizatora u oksidaciji metanola u alkalnoj sredini, pokazano je da je ta razlika znatno manja nego u kiseloj sredini. Predložen je kvazi-bifunkcionalni mehanizam reakcije. Dobijeni kinetički parametri ukazuju na to da je hemijska reakcija između adsorbovanih COad i OHad čestica spori stupanj u oksidaciji metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media, Kinetika oksidacije metanola na Pt2Ru3/C katalizatoru u alkalnoj sredini",
volume = "72",
number = "11",
pages = "1095-1101",
doi = "10.2298/JSC0711095T"
}

Tripković, A., Popović, K.,& Lović, J.. (2007). Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 72(11), 1095-1101.
https://doi.org/10.2298/JSC0711095T

Tripković A, Popović K, Lović J. Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media. in Journal of the Serbian Chemical Society. 2007;72(11):1095-1101.
doi:10.2298/JSC0711095T .

Tripković, Amalija, Popović, Ksenija, Lović, Jelena, "Kinetic study of methanol oxidation on Pt2Ru3/C catalyst in the alkaline media" in Journal of the Serbian Chemical Society, 72, no. 11 (2007):1095-1101,
https://doi.org/10.2298/JSC0711095T . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Gojković, Snežana Lj.
AU  - Popović, Ksenija
AU  - Tripković, Dušan
AU  - Tripković, Amalija
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/282
AB  - Formic acid oxidation was studied at low-index Pt single crystals (model systems) as well as at the platinum catalyst supported on high area carbon (real catalyst) in HClO4. The Pt single crystals were characterized by LEED. The LEED patterns obtained after a mild heating of flame-annealed crystals have shown clean, well ordered unreconstructured surfaces. Pt-C supported catalyst was analyzed by AFM and STM in air and by XRD. AFM and STM images revealed the presence of Pt-C agglomerates of several tenth of nm consisting of Pt particles ranged from 2 nm to 6 nm. The electrocatalytic activity of these catalysts in formic acid oxidation increased in a sequence: Pt(100) < Pt(110) < Pt-C/GC < Pt(111).
T2  - Materials Science Forum
T1  - Structural effects in electrocatalysis: Formic acid oxidation at model and real Pt catalysts
VL  - 518
SP  - 259
EP  - 264
UR  - https://hdl.handle.net/21.15107/rcub_cer_282
ER  - 

@article{
author = "Lović, Jelena and Gojković, Snežana Lj. and Popović, Ksenija and Tripković, Dušan and Tripković, Amalija",
year = "2006",
abstract = "Formic acid oxidation was studied at low-index Pt single crystals (model systems) as well as at the platinum catalyst supported on high area carbon (real catalyst) in HClO4. The Pt single crystals were characterized by LEED. The LEED patterns obtained after a mild heating of flame-annealed crystals have shown clean, well ordered unreconstructured surfaces. Pt-C supported catalyst was analyzed by AFM and STM in air and by XRD. AFM and STM images revealed the presence of Pt-C agglomerates of several tenth of nm consisting of Pt particles ranged from 2 nm to 6 nm. The electrocatalytic activity of these catalysts in formic acid oxidation increased in a sequence: Pt(100) < Pt(110) < Pt-C/GC < Pt(111).",
journal = "Materials Science Forum",
title = "Structural effects in electrocatalysis: Formic acid oxidation at model and real Pt catalysts",
volume = "518",
pages = "259-264",
url = "https://hdl.handle.net/21.15107/rcub_cer_282"
}

Lović, J., Gojković, S. Lj., Popović, K., Tripković, D.,& Tripković, A.. (2006). Structural effects in electrocatalysis: Formic acid oxidation at model and real Pt catalysts. in Materials Science Forum, 518, 259-264.
https://hdl.handle.net/21.15107/rcub_cer_282

Lović J, Gojković SL, Popović K, Tripković D, Tripković A. Structural effects in electrocatalysis: Formic acid oxidation at model and real Pt catalysts. in Materials Science Forum. 2006;518:259-264.
https://hdl.handle.net/21.15107/rcub_cer_282 .

Lović, Jelena, Gojković, Snežana Lj., Popović, Ksenija, Tripković, Dušan, Tripković, Amalija, "Structural effects in electrocatalysis: Formic acid oxidation at model and real Pt catalysts" in Materials Science Forum, 518 (2006):259-264,
https://hdl.handle.net/21.15107/rcub_cer_282 .

TY  - JOUR
AU  - Tripković, Amalija
AU  - Gojković, Snežana Lj.
AU  - Popović, Ksenija
AU  - Lović, Jelena
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/251
AB  - Methanol oxidation in acid solution was studied at platinum single crystals, Pt(hkl), as the model catalyst, and at nanostructural platinum supported on high surface area carbon, Pt/C, as the real catalyst. The linear extrapolation method was used to determine the beginning of hydroxyl anion adsorption. Structural sensitivity of the adsorption was proved and a correlation with the onset of the methanol oxidation current was established at all catalysts. Bisulfate and chloride anions were found to decrease the methanol oxidation rate, but probably did not influence the reaction parth. The specific activity for the reaction increased in the sequence Pt(110)  LT Pt/C  LT  Pt(111), suggesting that the activity of the supported Pt catalyst can be correlated with the activities of the dominating crystal planes on its surface.
AB  - Oksidacija metanola ispitivana je na niskoindeksnim Pt monokristalnim elektrodama (model katalizator) i na nanokatalizatoru Pt dispergovanom na aktivnom uglju kao nosaču (realni katalizator) u kiseloj sredini. Metoda linearne ekstrapolacije krivih zavisnosti količine naelektrisanja adsorpcije kiseoničnih čestica od potencijala korišćena je za određivanje početka adsorpcije OH anjona. Potvrđeno je da je adsorpcija OH čestica strukturno osetljiva reakcija i pokazana je korelacija sa početkom reakcije oksidacije metanola. Utvrđeno je da bisulfatni i hloridni anjoni iz nosećeg elektrolita smanjuju brzinu oksidacije metanola, ali verovatno ne utiču na reakcioni put. Elektrokatalitička aktivnost ispitivanih katalizatora rasla je u nizu Pt(110)  LT  Pt/C  LT  Pt(111) ukazujući na to da se aktivnost Pt nanokatalizatora može povezati sa udelima niskoindeksnih ravni na površini Pt nanočestice.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Methanol oxidation at platinum electrodes in acid solution: Comparison between model and real catalysts
T1  - Oksidacija metanola na platinskim elektrodama u kiseloj sredini - poređenje model i realnih katalizatora
VL  - 71
IS  - 12
SP  - 1333
EP  - 1343
DO  - 10.2298/JSC0612333T
ER  - 

@article{
author = "Tripković, Amalija and Gojković, Snežana Lj. and Popović, Ksenija and Lović, Jelena",
year = "2006",
abstract = "Methanol oxidation in acid solution was studied at platinum single crystals, Pt(hkl), as the model catalyst, and at nanostructural platinum supported on high surface area carbon, Pt/C, as the real catalyst. The linear extrapolation method was used to determine the beginning of hydroxyl anion adsorption. Structural sensitivity of the adsorption was proved and a correlation with the onset of the methanol oxidation current was established at all catalysts. Bisulfate and chloride anions were found to decrease the methanol oxidation rate, but probably did not influence the reaction parth. The specific activity for the reaction increased in the sequence Pt(110)  LT Pt/C  LT  Pt(111), suggesting that the activity of the supported Pt catalyst can be correlated with the activities of the dominating crystal planes on its surface., Oksidacija metanola ispitivana je na niskoindeksnim Pt monokristalnim elektrodama (model katalizator) i na nanokatalizatoru Pt dispergovanom na aktivnom uglju kao nosaču (realni katalizator) u kiseloj sredini. Metoda linearne ekstrapolacije krivih zavisnosti količine naelektrisanja adsorpcije kiseoničnih čestica od potencijala korišćena je za određivanje početka adsorpcije OH anjona. Potvrđeno je da je adsorpcija OH čestica strukturno osetljiva reakcija i pokazana je korelacija sa početkom reakcije oksidacije metanola. Utvrđeno je da bisulfatni i hloridni anjoni iz nosećeg elektrolita smanjuju brzinu oksidacije metanola, ali verovatno ne utiču na reakcioni put. Elektrokatalitička aktivnost ispitivanih katalizatora rasla je u nizu Pt(110)  LT  Pt/C  LT  Pt(111) ukazujući na to da se aktivnost Pt nanokatalizatora može povezati sa udelima niskoindeksnih ravni na površini Pt nanočestice.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Methanol oxidation at platinum electrodes in acid solution: Comparison between model and real catalysts, Oksidacija metanola na platinskim elektrodama u kiseloj sredini - poređenje model i realnih katalizatora",
volume = "71",
number = "12",
pages = "1333-1343",
doi = "10.2298/JSC0612333T"
}

Tripković, A., Gojković, S. Lj., Popović, K.,& Lović, J.. (2006). Methanol oxidation at platinum electrodes in acid solution: Comparison between model and real catalysts. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 71(12), 1333-1343.
https://doi.org/10.2298/JSC0612333T

Tripković A, Gojković SL, Popović K, Lović J. Methanol oxidation at platinum electrodes in acid solution: Comparison between model and real catalysts. in Journal of the Serbian Chemical Society. 2006;71(12):1333-1343.
doi:10.2298/JSC0612333T .

Tripković, Amalija, Gojković, Snežana Lj., Popović, Ksenija, Lović, Jelena, "Methanol oxidation at platinum electrodes in acid solution: Comparison between model and real catalysts" in Journal of the Serbian Chemical Society, 71, no. 12 (2006):1333-1343,
https://doi.org/10.2298/JSC0612333T . .

TY  - JOUR
AU  - Tripković, Amalija
AU  - Popović, Ksenija
AU  - Stevanović, Rade M.
AU  - Socha, R.
AU  - Kowal, Andrzej
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2879
AB  - Formic acid oxidation in acid solution was examined on a PtBi alloy characterized by X-ray photoelectron spectroscopy. Three chemical states of Bi, i.e., PtBi or Bi(0), Bi2O3 and BiO(OH) were found. Electrochemical characterization revealed that PtBi follows the behavior of its constituents, as well as that Bi is not stable in the PtBi alloy. It was established that the activity of PtBi is highly dependent of the reduction/oxidation of Bi species. Oxidation of formic acid does not occur on Bi covered PtBi. Rotated PtBi showed impressive activity relative to polycrystalline Pt, with the onset potential shifted by 0.25 V towards more negative potentials, and attained steady state current densities at 0.05 V, higher by two and half orders of magnitude. The activity of PtBi is caused by UPD phenomena of Bi on Pt, which was electrochemically detected. In addition, based on XPS analysis, it is proposed that the activity of PtBi could also be caused by the bifunctional action of hydroxylated Bi species.
PB  - Elsevier
T2  - Electrochemistry Communication
T1  - Activity of a PtBi alloy in the electrochemical oxidation of formic acid
VL  - 8
IS  - 9
SP  - 1492
EP  - 1498
DO  - 10.1016/j.elecom.2006.07.005
ER  - 

@article{
author = "Tripković, Amalija and Popović, Ksenija and Stevanović, Rade M. and Socha, R. and Kowal, Andrzej",
year = "2006",
abstract = "Formic acid oxidation in acid solution was examined on a PtBi alloy characterized by X-ray photoelectron spectroscopy. Three chemical states of Bi, i.e., PtBi or Bi(0), Bi2O3 and BiO(OH) were found. Electrochemical characterization revealed that PtBi follows the behavior of its constituents, as well as that Bi is not stable in the PtBi alloy. It was established that the activity of PtBi is highly dependent of the reduction/oxidation of Bi species. Oxidation of formic acid does not occur on Bi covered PtBi. Rotated PtBi showed impressive activity relative to polycrystalline Pt, with the onset potential shifted by 0.25 V towards more negative potentials, and attained steady state current densities at 0.05 V, higher by two and half orders of magnitude. The activity of PtBi is caused by UPD phenomena of Bi on Pt, which was electrochemically detected. In addition, based on XPS analysis, it is proposed that the activity of PtBi could also be caused by the bifunctional action of hydroxylated Bi species.",
publisher = "Elsevier",
journal = "Electrochemistry Communication",
title = "Activity of a PtBi alloy in the electrochemical oxidation of formic acid",
volume = "8",
number = "9",
pages = "1492-1498",
doi = "10.1016/j.elecom.2006.07.005"
}

Tripković, A., Popović, K., Stevanović, R. M., Socha, R.,& Kowal, A.. (2006). Activity of a PtBi alloy in the electrochemical oxidation of formic acid. in Electrochemistry Communication
Elsevier., 8(9), 1492-1498.
https://doi.org/10.1016/j.elecom.2006.07.005

Tripković A, Popović K, Stevanović RM, Socha R, Kowal A. Activity of a PtBi alloy in the electrochemical oxidation of formic acid. in Electrochemistry Communication. 2006;8(9):1492-1498.
doi:10.1016/j.elecom.2006.07.005 .

Tripković, Amalija, Popović, Ksenija, Stevanović, Rade M., Socha, R., Kowal, Andrzej, "Activity of a PtBi alloy in the electrochemical oxidation of formic acid" in Electrochemistry Communication, 8, no. 9 (2006):1492-1498,
https://doi.org/10.1016/j.elecom.2006.07.005 . .

TY  - JOUR
AU  - Lović, Jelena
AU  - Tripković, Amalija
AU  - Gojković, Snežana Lj.
AU  - Popović, Ksenija
AU  - Tripković, Dušan
AU  - Olszewski, Piotr K.
AU  - Kowal, Andrzej
PY  - 2005
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/209
AB  - Oxidation of formic acid on the platinum catalyst supported on high area carbon was investigated by potent iodynamic and quasi-steady-state polarization measurements. It was found that the poisoning of the reaction occurred both in the hydrogen region and in the double-layer region, but poisons were formed faster at lower potentials. Kinetics of the reaction was consistent with the dual path mechanism. At lower potentials HCOOH was oxidized to CO, at the Pt sites uncovered by COads. If high coverage by the poisoning species was attained, the reaction reached the limiting current plateau and further increase of the Current densities started at the potential of COads oxidation. Kinetic parameters of the HCOOH oxidation suggested that the rate determining step was the transfer of the first electron from HCOOHads, which was adsorbed under the Temkin conditions, Oxidation of formic acid became pH-dependent reaction in the electrolytes of pH  LT  1 with the reaction order with respect to H+ ions of about - 0.8.
PB  - Elsevier
T2  - Journal of Electroanalytical Chemistry
T1  - Kinetic study of formic acid oxidation on carbon-supported platinum electrocatalyst
VL  - 581
IS  - 2
SP  - 294
EP  - 302
DO  - 10.1016/j.jelechem.2005.05.002
ER  - 

@article{
author = "Lović, Jelena and Tripković, Amalija and Gojković, Snežana Lj. and Popović, Ksenija and Tripković, Dušan and Olszewski, Piotr K. and Kowal, Andrzej",
year = "2005",
abstract = "Oxidation of formic acid on the platinum catalyst supported on high area carbon was investigated by potent iodynamic and quasi-steady-state polarization measurements. It was found that the poisoning of the reaction occurred both in the hydrogen region and in the double-layer region, but poisons were formed faster at lower potentials. Kinetics of the reaction was consistent with the dual path mechanism. At lower potentials HCOOH was oxidized to CO, at the Pt sites uncovered by COads. If high coverage by the poisoning species was attained, the reaction reached the limiting current plateau and further increase of the Current densities started at the potential of COads oxidation. Kinetic parameters of the HCOOH oxidation suggested that the rate determining step was the transfer of the first electron from HCOOHads, which was adsorbed under the Temkin conditions, Oxidation of formic acid became pH-dependent reaction in the electrolytes of pH  LT  1 with the reaction order with respect to H+ ions of about - 0.8.",
publisher = "Elsevier",
journal = "Journal of Electroanalytical Chemistry",
title = "Kinetic study of formic acid oxidation on carbon-supported platinum electrocatalyst",
volume = "581",
number = "2",
pages = "294-302",
doi = "10.1016/j.jelechem.2005.05.002"
}

Lović, J., Tripković, A., Gojković, S. Lj., Popović, K., Tripković, D., Olszewski, P. K.,& Kowal, A.. (2005). Kinetic study of formic acid oxidation on carbon-supported platinum electrocatalyst. in Journal of Electroanalytical Chemistry
Elsevier., 581(2), 294-302.
https://doi.org/10.1016/j.jelechem.2005.05.002

Lović J, Tripković A, Gojković SL, Popović K, Tripković D, Olszewski PK, Kowal A. Kinetic study of formic acid oxidation on carbon-supported platinum electrocatalyst. in Journal of Electroanalytical Chemistry. 2005;581(2):294-302.
doi:10.1016/j.jelechem.2005.05.002 .

Lović, Jelena, Tripković, Amalija, Gojković, Snežana Lj., Popović, Ksenija, Tripković, Dušan, Olszewski, Piotr K., Kowal, Andrzej, "Kinetic study of formic acid oxidation on carbon-supported platinum electrocatalyst" in Journal of Electroanalytical Chemistry, 581, no. 2 (2005):294-302,
https://doi.org/10.1016/j.jelechem.2005.05.002 . .