TY  - CONF
AU  - Cvetković, Vesna S.
AU  - Nikolić, Nebojša D.
AU  - Košević, Milica
AU  - Barudžija, Tanja S.
AU  - Dimitrijević, Silvana B.
AU  - Jovićević, Jovan N.
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6760
AB  - In this work, the electrochemical deposition of copper
onto palladium working substrate from ChCl/EG (1:2 ratio) DES electrolyte at
50°C was investigated. Additionally, the Cu(II) electroreduction process was
studied by potentiodynamic measurements, cyclic voltammetry,
chronoamperometry, in the electrolytes with different concentrations of Cu(II)
ions ranging from 0.1 M to 0.5 M.
PB  - Skopje : Society of chemists and technologists of Macedonia
C3  - Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia
T1  - Copper Electrodeposition onto Palladium from a Deep Eutectic System Based on Choline Chloride
SP  - 142
EP  - 142
UR  - https://hdl.handle.net/21.15107/rcub_cer_6760
ER  - 

@conference{
author = "Cvetković, Vesna S. and Nikolić, Nebojša D. and Košević, Milica and Barudžija, Tanja S. and Dimitrijević, Silvana B. and Jovićević, Jovan N.",
year = "2023",
abstract = "In this work, the electrochemical deposition of copper
onto palladium working substrate from ChCl/EG (1:2 ratio) DES electrolyte at
50°C was investigated. Additionally, the Cu(II) electroreduction process was
studied by potentiodynamic measurements, cyclic voltammetry,
chronoamperometry, in the electrolytes with different concentrations of Cu(II)
ions ranging from 0.1 M to 0.5 M.",
publisher = "Skopje : Society of chemists and technologists of Macedonia",
journal = "Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia",
title = "Copper Electrodeposition onto Palladium from a Deep Eutectic System Based on Choline Chloride",
pages = "142-142",
url = "https://hdl.handle.net/21.15107/rcub_cer_6760"
}

Cvetković, V. S., Nikolić, N. D., Košević, M., Barudžija, T. S., Dimitrijević, S. B.,& Jovićević, J. N.. (2023). Copper Electrodeposition onto Palladium from a Deep Eutectic System Based on Choline Chloride. in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia
Skopje : Society of chemists and technologists of Macedonia., 142-142.
https://hdl.handle.net/21.15107/rcub_cer_6760

Cvetković VS, Nikolić ND, Košević M, Barudžija TS, Dimitrijević SB, Jovićević JN. Copper Electrodeposition onto Palladium from a Deep Eutectic System Based on Choline Chloride. in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia. 2023;:142-142.
https://hdl.handle.net/21.15107/rcub_cer_6760 .

Cvetković, Vesna S., Nikolić, Nebojša D., Košević, Milica, Barudžija, Tanja S., Dimitrijević, Silvana B., Jovićević, Jovan N., "Copper Electrodeposition onto Palladium from a Deep Eutectic System Based on Choline Chloride" in Book of abstracts - 26th Congress of Chemists and Technologysts of Macedonia, 20–23 September 2023, Metropol Lake Resort Ohrid, N. Macedonia (2023):142-142,
https://hdl.handle.net/21.15107/rcub_cer_6760 .

TY  - CONF
AU  - Košević, Milica
AU  - Lović, Jelena
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6211
AB  - Electrodeposited Pd and Sb-Pd catalysts were tested for the ethanol oxidation reaction by cyclic voltammetry and chronoamperometry. Palladium-antimony deposit was synthesized on a glassy carbon substrate by a two-step process, comprising deposition of Sb followed by deposition of Pd. The Sb-Pd electrocatalyst with the Sn:Pd atomic ratio 0.2:0.8 was obtained. Compared with pure Pd, the incorporation of Sb results in the increase of activity and stability of bimetallic catalyst for the electrocatalytic ethanol oxidation reaction. Besides upon the end of the current-time transient, the investigated Sb-Pd catalyst was subjected to the potential cycling showing the ability to recover activity loss implying the surface composition stability. The enhanced performance of Sb-Pd is mainly ascribed to the bifunctional mechanism and electronic effect.
AB  - Elektrohemijski nataloženi Pd i Sb-Pd katalizatori su ispitivani u reakciji oksidacije etanola cikličnom voltametrijom i hronoampeometrijskom metodom.
PB  - Srpsko hemijsko društvo
C3  - Kratki izvodi radova, knjiga radova - 59. Savetovanje Srpskog hemijskog društva, 1. i 2. jun 2023. godine, Novi Sad / Book of Abstracts, Proceedings - 59th Meeting of the Serbian Chemical Society, June 1-2, 2023, Novi Sad, Serbia
T1  - Enhancement of ethanol oxidation on Pd electrodeposited over Sb2O3
T1  - Poboljšanje oksidacije etanola na Pd elektrohemijski nataloženom  preko Sb2O3
SP  - 61
EP  - 61
UR  - https://hdl.handle.net/21.15107/rcub_cer_6211
ER  - 

@conference{
author = "Košević, Milica and Lović, Jelena",
year = "2023",
abstract = "Electrodeposited Pd and Sb-Pd catalysts were tested for the ethanol oxidation reaction by cyclic voltammetry and chronoamperometry. Palladium-antimony deposit was synthesized on a glassy carbon substrate by a two-step process, comprising deposition of Sb followed by deposition of Pd. The Sb-Pd electrocatalyst with the Sn:Pd atomic ratio 0.2:0.8 was obtained. Compared with pure Pd, the incorporation of Sb results in the increase of activity and stability of bimetallic catalyst for the electrocatalytic ethanol oxidation reaction. Besides upon the end of the current-time transient, the investigated Sb-Pd catalyst was subjected to the potential cycling showing the ability to recover activity loss implying the surface composition stability. The enhanced performance of Sb-Pd is mainly ascribed to the bifunctional mechanism and electronic effect., Elektrohemijski nataloženi Pd i Sb-Pd katalizatori su ispitivani u reakciji oksidacije etanola cikličnom voltametrijom i hronoampeometrijskom metodom.",
publisher = "Srpsko hemijsko društvo",
journal = "Kratki izvodi radova, knjiga radova - 59. Savetovanje Srpskog hemijskog društva, 1. i 2. jun 2023. godine, Novi Sad / Book of Abstracts, Proceedings - 59th Meeting of the Serbian Chemical Society, June 1-2, 2023, Novi Sad, Serbia",
title = "Enhancement of ethanol oxidation on Pd electrodeposited over Sb2O3, Poboljšanje oksidacije etanola na Pd elektrohemijski nataloženom  preko Sb2O3",
pages = "61-61",
url = "https://hdl.handle.net/21.15107/rcub_cer_6211"
}

Košević, M.,& Lović, J.. (2023). Enhancement of ethanol oxidation on Pd electrodeposited over Sb2O3. in Kratki izvodi radova, knjiga radova - 59. Savetovanje Srpskog hemijskog društva, 1. i 2. jun 2023. godine, Novi Sad / Book of Abstracts, Proceedings - 59th Meeting of the Serbian Chemical Society, June 1-2, 2023, Novi Sad, Serbia
Srpsko hemijsko društvo., 61-61.
https://hdl.handle.net/21.15107/rcub_cer_6211

Košević M, Lović J. Enhancement of ethanol oxidation on Pd electrodeposited over Sb2O3. in Kratki izvodi radova, knjiga radova - 59. Savetovanje Srpskog hemijskog društva, 1. i 2. jun 2023. godine, Novi Sad / Book of Abstracts, Proceedings - 59th Meeting of the Serbian Chemical Society, June 1-2, 2023, Novi Sad, Serbia. 2023;:61-61.
https://hdl.handle.net/21.15107/rcub_cer_6211 .

Košević, Milica, Lović, Jelena, "Enhancement of ethanol oxidation on Pd electrodeposited over Sb2O3" in Kratki izvodi radova, knjiga radova - 59. Savetovanje Srpskog hemijskog društva, 1. i 2. jun 2023. godine, Novi Sad / Book of Abstracts, Proceedings - 59th Meeting of the Serbian Chemical Society, June 1-2, 2023, Novi Sad, Serbia (2023):61-61,
https://hdl.handle.net/21.15107/rcub_cer_6211 .

TY  - CONF
AU  - Košević, Milica
AU  - Mihailović, Marija
AU  - Panić, Vladimir
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7138
AB  - Pseudocapacive reaction of ruthenium oxide was investigated by cyclic voltammetry (CV) measurements combined with electrochemical quartz-crystal nanobalance. RuO2 was synthesized by one-pot microwave assisted hydrothermal method. CV measurements were conducted in H2SO4 and Na2SO4 solutions. The ruthenium oxide electrode as a working electrode was prepared by drop casting the water suspension of RuO2 on Au covered quartz electrode. Beside influence of different electrolyte, the effect of thermal treatment of RuO2 was also investigated since pseudocapacitive behaviour of RuO2 strongly depends on its hydrous form. The obtained results were compared to those of commercial RuO2. The results indicate that during the redox reaction of RuO2, various types of charge occur simultaneously. The mass loss or mass gain depends on the specific potential applied and the electrolyte employed.
AB  - Pseudokapacitivna reakcija rutenijum oksida ispitivana je metodom ciklične voltametrije (CV) u kombinaciji sa primenom elektrohemijske kvarc-kristalne nanovage. RuO2 je sintetizovan jednostepenom hidrotermalnom metodom, pomoću mikrotalasne tehnike. CV merenja su sprovedena u rastvorima H2SO4 i Na2SO4. Elektroda od rutenijum oksida kao radna elektroda je pripremljena nakapavanjem vodene suspenzije RuO2 na zlatom prekrivenu kvarcnu elektrodu. Pored uticaja različitih elektrolita, istražen je i efekat termičkog tetmana RuO2 jer seudokapacitivno ponašanje RuO2 u velikoj meri zavisi od njegovog hidratisanog oblika. Dobijeni rezultati su upoređeni sa rezultatima ispitivanja komercijalnog RuO2. Rezultati pokazuju da se tokom redoks
reakcije RuO2 istovremeno javljaju različite vrste naelektrisanja. Gubitak mase ili povećanje mase zavisi od primenjenog potencijala i upotrebljenog elektrolita.
PB  - Crnogorsko društvo za koroziju, zaštitu materijala i zaštitu životne sredine
C3  - Fifth international symposium on corrosion and materials protection, environmental protection and protection against fire proceedings, Proceedings, 26-29. septembar 2023. godine, Bar / Peti međunarodni simpozijum o koroziji i zaštiti materijala, životnoj sredini i zaštiti od požara, Knjiga radova, 26-29. septembar 2023. godine, Bar
T1  - The pseudo-capacitance of hydrous RuO2 accompanied by mass changes
SP  - 73
EP  - 80
UR  - https://hdl.handle.net/21.15107/rcub_cer_7138
ER  - 

@conference{
author = "Košević, Milica and Mihailović, Marija and Panić, Vladimir",
year = "2023",
abstract = "Pseudocapacive reaction of ruthenium oxide was investigated by cyclic voltammetry (CV) measurements combined with electrochemical quartz-crystal nanobalance. RuO2 was synthesized by one-pot microwave assisted hydrothermal method. CV measurements were conducted in H2SO4 and Na2SO4 solutions. The ruthenium oxide electrode as a working electrode was prepared by drop casting the water suspension of RuO2 on Au covered quartz electrode. Beside influence of different electrolyte, the effect of thermal treatment of RuO2 was also investigated since pseudocapacitive behaviour of RuO2 strongly depends on its hydrous form. The obtained results were compared to those of commercial RuO2. The results indicate that during the redox reaction of RuO2, various types of charge occur simultaneously. The mass loss or mass gain depends on the specific potential applied and the electrolyte employed., Pseudokapacitivna reakcija rutenijum oksida ispitivana je metodom ciklične voltametrije (CV) u kombinaciji sa primenom elektrohemijske kvarc-kristalne nanovage. RuO2 je sintetizovan jednostepenom hidrotermalnom metodom, pomoću mikrotalasne tehnike. CV merenja su sprovedena u rastvorima H2SO4 i Na2SO4. Elektroda od rutenijum oksida kao radna elektroda je pripremljena nakapavanjem vodene suspenzije RuO2 na zlatom prekrivenu kvarcnu elektrodu. Pored uticaja različitih elektrolita, istražen je i efekat termičkog tetmana RuO2 jer seudokapacitivno ponašanje RuO2 u velikoj meri zavisi od njegovog hidratisanog oblika. Dobijeni rezultati su upoređeni sa rezultatima ispitivanja komercijalnog RuO2. Rezultati pokazuju da se tokom redoks
reakcije RuO2 istovremeno javljaju različite vrste naelektrisanja. Gubitak mase ili povećanje mase zavisi od primenjenog potencijala i upotrebljenog elektrolita.",
publisher = "Crnogorsko društvo za koroziju, zaštitu materijala i zaštitu životne sredine",
journal = "Fifth international symposium on corrosion and materials protection, environmental protection and protection against fire proceedings, Proceedings, 26-29. septembar 2023. godine, Bar / Peti međunarodni simpozijum o koroziji i zaštiti materijala, životnoj sredini i zaštiti od požara, Knjiga radova, 26-29. septembar 2023. godine, Bar",
title = "The pseudo-capacitance of hydrous RuO2 accompanied by mass changes",
pages = "73-80",
url = "https://hdl.handle.net/21.15107/rcub_cer_7138"
}

Košević, M., Mihailović, M.,& Panić, V.. (2023). The pseudo-capacitance of hydrous RuO2 accompanied by mass changes. in Fifth international symposium on corrosion and materials protection, environmental protection and protection against fire proceedings, Proceedings, 26-29. septembar 2023. godine, Bar / Peti međunarodni simpozijum o koroziji i zaštiti materijala, životnoj sredini i zaštiti od požara, Knjiga radova, 26-29. septembar 2023. godine, Bar
Crnogorsko društvo za koroziju, zaštitu materijala i zaštitu životne sredine., 73-80.
https://hdl.handle.net/21.15107/rcub_cer_7138

Košević M, Mihailović M, Panić V. The pseudo-capacitance of hydrous RuO2 accompanied by mass changes. in Fifth international symposium on corrosion and materials protection, environmental protection and protection against fire proceedings, Proceedings, 26-29. septembar 2023. godine, Bar / Peti međunarodni simpozijum o koroziji i zaštiti materijala, životnoj sredini i zaštiti od požara, Knjiga radova, 26-29. septembar 2023. godine, Bar. 2023;:73-80.
https://hdl.handle.net/21.15107/rcub_cer_7138 .

Košević, Milica, Mihailović, Marija, Panić, Vladimir, "The pseudo-capacitance of hydrous RuO2 accompanied by mass changes" in Fifth international symposium on corrosion and materials protection, environmental protection and protection against fire proceedings, Proceedings, 26-29. septembar 2023. godine, Bar / Peti međunarodni simpozijum o koroziji i zaštiti materijala, životnoj sredini i zaštiti od požara, Knjiga radova, 26-29. septembar 2023. godine, Bar (2023):73-80,
https://hdl.handle.net/21.15107/rcub_cer_7138 .

TY  - CONF
AU  - Košević, Milica
AU  - Mihailović, Marija
AU  - Panić, Vladimir
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7331
AB  - Pseudocapacitance reaction of ruthenium oxide was investigated by cyclic voltammetry (CV) measurements combined with electrochemical quartz-crystal nanobalance. RuO2 was synthesized by one-pot microwave assisted hydrothermal method. CV measurements were conducted in H2SO4 and Na2SO4 solutions. The ruthenium oxide electrode as a working electrode was prepared by drop casting the water suspension of RuO2 on Au covered quartz electrode. Beside influence of different electrolyte, the effect of thermal treatment of RuO2 was also investigated since pseudocapacitive behaviour of RuO2 strongly depends on its hydrous form. The obtained results were compared to those of commercial RuO2. The results indicate that during the redox reaction of RuO2, various types of charge occur simultaneously. The mass loss or mass gain depends on the specific potential applied and the electrolyte employed.
T1  - Poster presentation: The pseudo-capacitance of hydrous RuO2 accompanied by mass changes
UR  - https://hdl.handle.net/21.15107/rcub_cer_7331
ER  - 

@conference{
author = "Košević, Milica and Mihailović, Marija and Panić, Vladimir",
year = "2023",
abstract = "Pseudocapacitance reaction of ruthenium oxide was investigated by cyclic voltammetry (CV) measurements combined with electrochemical quartz-crystal nanobalance. RuO2 was synthesized by one-pot microwave assisted hydrothermal method. CV measurements were conducted in H2SO4 and Na2SO4 solutions. The ruthenium oxide electrode as a working electrode was prepared by drop casting the water suspension of RuO2 on Au covered quartz electrode. Beside influence of different electrolyte, the effect of thermal treatment of RuO2 was also investigated since pseudocapacitive behaviour of RuO2 strongly depends on its hydrous form. The obtained results were compared to those of commercial RuO2. The results indicate that during the redox reaction of RuO2, various types of charge occur simultaneously. The mass loss or mass gain depends on the specific potential applied and the electrolyte employed.",
title = "Poster presentation: The pseudo-capacitance of hydrous RuO2 accompanied by mass changes",
url = "https://hdl.handle.net/21.15107/rcub_cer_7331"
}

Košević, M., Mihailović, M.,& Panić, V.. (2023). Poster presentation: The pseudo-capacitance of hydrous RuO2 accompanied by mass changes. .
https://hdl.handle.net/21.15107/rcub_cer_7331

Košević M, Mihailović M, Panić V. Poster presentation: The pseudo-capacitance of hydrous RuO2 accompanied by mass changes. 2023;.
https://hdl.handle.net/21.15107/rcub_cer_7331 .

Košević, Milica, Mihailović, Marija, Panić, Vladimir, "Poster presentation: The pseudo-capacitance of hydrous RuO2 accompanied by mass changes" (2023),
https://hdl.handle.net/21.15107/rcub_cer_7331 .

TY  - JOUR
AU  - Alkan, Gözde
AU  - Košević, Milica
AU  - Mihailović, Marija
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5324
AB  - Polygonal Pt nanoparticles were synthesized using ultrasonic spray pyrolysis (USP) at different precursor concentrations. Physicochemical analysis of the synthesized Pt particles involved thermogravimetric, microscopic, electron diffractive, and light absorptive/refractive characteristics. Electrochemical properties and activity in the oxygen reduction reaction (ORR) of the prepared material were compared to commercial Pt black. Registered electrochemical behavior is correlated to the structural properties of synthesized powders by impedance characteristics in ORR. The reported results confirmed that Pt nanoparticles of a characteristic and uniform size and shape, suitable for incorporation on the surfaces of interactive hosts as catalyst supports, were synthesized. It is found that USP-synthesized Pt involves larger particles than Pt black, with the size being slightly dependent on precursor concentration. Among ORR-active planes, the least active (111) structurally defined the synthesized particles. These two morphological and structural characteristics caused the USP-Pt to be made of lower Pt-intrinsic capacitive and redox currents, as well as of lower ORR activity. Although being of lower activity, USP-Pt is less sensitive to the rate of ORR current perturbations at higher overpotentials. This issue is assigned to less-compact catalyst layers and uniform particle size distribution, and consequently, of activity throughout the catalyst layer with respect to Pt black. These features are considered to positively affect catalyst stability and thus promote USP synthesis for improved properties of host-supported Pt catalysts.
PB  - MDPI
T2  - Metals
T1  - Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts
VL  - 12
IS  - 2
SP  - 290
DO  - 10.3390/met12020290
ER  - 

@article{
author = "Alkan, Gözde and Košević, Milica and Mihailović, Marija and Stopić, Srećko and Friedrich, Bernd and Stevanović, Jasmina and Panić, Vladimir",
year = "2022",
abstract = "Polygonal Pt nanoparticles were synthesized using ultrasonic spray pyrolysis (USP) at different precursor concentrations. Physicochemical analysis of the synthesized Pt particles involved thermogravimetric, microscopic, electron diffractive, and light absorptive/refractive characteristics. Electrochemical properties and activity in the oxygen reduction reaction (ORR) of the prepared material were compared to commercial Pt black. Registered electrochemical behavior is correlated to the structural properties of synthesized powders by impedance characteristics in ORR. The reported results confirmed that Pt nanoparticles of a characteristic and uniform size and shape, suitable for incorporation on the surfaces of interactive hosts as catalyst supports, were synthesized. It is found that USP-synthesized Pt involves larger particles than Pt black, with the size being slightly dependent on precursor concentration. Among ORR-active planes, the least active (111) structurally defined the synthesized particles. These two morphological and structural characteristics caused the USP-Pt to be made of lower Pt-intrinsic capacitive and redox currents, as well as of lower ORR activity. Although being of lower activity, USP-Pt is less sensitive to the rate of ORR current perturbations at higher overpotentials. This issue is assigned to less-compact catalyst layers and uniform particle size distribution, and consequently, of activity throughout the catalyst layer with respect to Pt black. These features are considered to positively affect catalyst stability and thus promote USP synthesis for improved properties of host-supported Pt catalysts.",
publisher = "MDPI",
journal = "Metals",
title = "Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts",
volume = "12",
number = "2",
pages = "290",
doi = "10.3390/met12020290"
}

Alkan, G., Košević, M., Mihailović, M., Stopić, S., Friedrich, B., Stevanović, J.,& Panić, V.. (2022). Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts. in Metals
MDPI., 12(2), 290.
https://doi.org/10.3390/met12020290

Alkan G, Košević M, Mihailović M, Stopić S, Friedrich B, Stevanović J, Panić V. Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts. in Metals. 2022;12(2):290.
doi:10.3390/met12020290 .

Alkan, Gözde, Košević, Milica, Mihailović, Marija, Stopić, Srećko, Friedrich, Bernd, Stevanović, Jasmina, Panić, Vladimir, "Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts" in Metals, 12, no. 2 (2022):290,
https://doi.org/10.3390/met12020290 . .

TY  - JOUR
AU  - Mitterecker, Jonas
AU  - Košević, Milica
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
AU  - Stevanović, Jasmina
AU  - Mihailović, Marija
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5362
AB  - Determination of the extractive behavior of ionic species from lateritic ore leachates is complex, since the leachates are pregnant with tens of different ions in, as a rule, multiple oxide states. To examine the possible pathways of intrinsic electrochemical extraction of the crucial elements Ni and Co, it was necessary to make model solutions of these elements and to subject them to electrochemical examination techniques in order to obtain a benchmark. Beside Ni and Co, the model system for Fe had to be evaluated. Iron, as a dominant ore component by far, is the main interfering factor in the extraction processes of Ni and Co in rather low amounts from leaching solution. The leachate examination results were compared to separate model solutions, as well as to their combinations in concentrations and to pH values comparable to those of the leachate. The separation of the leachate components was initially performed by continuous increase in pH upon leaching with NaOH solution, and afterwards the pH-adjusted solutions were subjected to electrochemical investigation. With the purpose of connecting and quantifying the visual changes in leachate upon increase in pH, conductometric measurements were performed. Reactions of oxidation/precipitations were indicated, which led to the essential Fe removal by precipitation. Resulting solutions were found suitable for Ni and Co electrochemical extraction.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Metals
T1  - Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction
VL  - 12
IS  - 2
SP  - 325
DO  - 10.3390/met12020325
ER  - 

@article{
author = "Mitterecker, Jonas and Košević, Milica and Stopić, Srećko and Friedrich, Bernd and Panić, Vladimir and Stevanović, Jasmina and Mihailović, Marija",
year = "2022",
abstract = "Determination of the extractive behavior of ionic species from lateritic ore leachates is complex, since the leachates are pregnant with tens of different ions in, as a rule, multiple oxide states. To examine the possible pathways of intrinsic electrochemical extraction of the crucial elements Ni and Co, it was necessary to make model solutions of these elements and to subject them to electrochemical examination techniques in order to obtain a benchmark. Beside Ni and Co, the model system for Fe had to be evaluated. Iron, as a dominant ore component by far, is the main interfering factor in the extraction processes of Ni and Co in rather low amounts from leaching solution. The leachate examination results were compared to separate model solutions, as well as to their combinations in concentrations and to pH values comparable to those of the leachate. The separation of the leachate components was initially performed by continuous increase in pH upon leaching with NaOH solution, and afterwards the pH-adjusted solutions were subjected to electrochemical investigation. With the purpose of connecting and quantifying the visual changes in leachate upon increase in pH, conductometric measurements were performed. Reactions of oxidation/precipitations were indicated, which led to the essential Fe removal by precipitation. Resulting solutions were found suitable for Ni and Co electrochemical extraction.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Metals",
title = "Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction",
volume = "12",
number = "2",
pages = "325",
doi = "10.3390/met12020325"
}

Mitterecker, J., Košević, M., Stopić, S., Friedrich, B., Panić, V., Stevanović, J.,& Mihailović, M.. (2022). Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction. in Metals
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 12(2), 325.
https://doi.org/10.3390/met12020325

Mitterecker J, Košević M, Stopić S, Friedrich B, Panić V, Stevanović J, Mihailović M. Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction. in Metals. 2022;12(2):325.
doi:10.3390/met12020325 .

Mitterecker, Jonas, Košević, Milica, Stopić, Srećko, Friedrich, Bernd, Panić, Vladimir, Stevanović, Jasmina, Mihailović, Marija, "Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction" in Metals, 12, no. 2 (2022):325,
https://doi.org/10.3390/met12020325 . .

TY  - JOUR
AU  - Košević, Milica
AU  - Krstić, Sanja
AU  - Panić, Vladimir
AU  - Nikolić, Branislav Ž.
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5395
AB  - The influence of different hydroxides, applied to activate carbon black, on the electrochemical properties of activated carbon was investigated. The carbon material was prepared by hydrothermal treatment of sucrose and afterwards thermally activated using KOH, NaOH and LiOH. The electrochemical properties of the obtained samples were examined by cyclic voltammetry and electrochemical impedance spectroscopy and correlated to their physicochemical properties. All samples showed characteristic capacitor-like behaviour. The highest specific capacitance was obtained for the KOH-treated sample, while the increase in capacitance follows the sequence of the growth of ionic radius of a metal from an alkali which is used for activation. It was found that the dependence on the type of hydroxide is due to differences in the radii of a metal. The alkalies of larger radii of metal generated make pores wider and consequently the structure of a porous layer become more accessible to the charge transfer of capacitive response.
AB  - Испитиван је утицај различитих активирајућих хидроксида на електрохемијска својства активираних угљеничних материјала. Угљенични материјал је добијен хидротермалним третманом сахарозе, а потом активиран помоћу KOH, NaOH и LiOH. Електрохемијска својства добијених узорака испитивана су цикличном волтаметријом и спектроскопијом електрохемијске импеданције. Синтетизовани материјали показују капацитивна својства. Највећа специфична капацитивност добијена је за узорак третиран помоћу KOH, док капацитивност прати величину пречника јона метала из алкалије којом је активиран угљенични материјал.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Supercapacitive properties of the alkali metal hydroxides-activated carbons obtained from sucrose
T1  - Суперкапацитативна својства угљеничних материјала добијених из сахарозе и активираних хидроксидима алкалних метала
VL  - 87
IS  - 7-8
SP  - 867
EP  - 877
DO  - 10.2298/JSC220730059K
ER  - 

@article{
author = "Košević, Milica and Krstić, Sanja and Panić, Vladimir and Nikolić, Branislav Ž.",
year = "2022",
abstract = "The influence of different hydroxides, applied to activate carbon black, on the electrochemical properties of activated carbon was investigated. The carbon material was prepared by hydrothermal treatment of sucrose and afterwards thermally activated using KOH, NaOH and LiOH. The electrochemical properties of the obtained samples were examined by cyclic voltammetry and electrochemical impedance spectroscopy and correlated to their physicochemical properties. All samples showed characteristic capacitor-like behaviour. The highest specific capacitance was obtained for the KOH-treated sample, while the increase in capacitance follows the sequence of the growth of ionic radius of a metal from an alkali which is used for activation. It was found that the dependence on the type of hydroxide is due to differences in the radii of a metal. The alkalies of larger radii of metal generated make pores wider and consequently the structure of a porous layer become more accessible to the charge transfer of capacitive response., Испитиван је утицај различитих активирајућих хидроксида на електрохемијска својства активираних угљеничних материјала. Угљенични материјал је добијен хидротермалним третманом сахарозе, а потом активиран помоћу KOH, NaOH и LiOH. Електрохемијска својства добијених узорака испитивана су цикличном волтаметријом и спектроскопијом електрохемијске импеданције. Синтетизовани материјали показују капацитивна својства. Највећа специфична капацитивност добијена је за узорак третиран помоћу KOH, док капацитивност прати величину пречника јона метала из алкалије којом је активиран угљенични материјал.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Supercapacitive properties of the alkali metal hydroxides-activated carbons obtained from sucrose, Суперкапацитативна својства угљеничних материјала добијених из сахарозе и активираних хидроксидима алкалних метала",
volume = "87",
number = "7-8",
pages = "867-877",
doi = "10.2298/JSC220730059K"
}

Košević, M., Krstić, S., Panić, V.,& Nikolić, B. Ž.. (2022). Supercapacitive properties of the alkali metal hydroxides-activated carbons obtained from sucrose. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 87(7-8), 867-877.
https://doi.org/10.2298/JSC220730059K

Košević M, Krstić S, Panić V, Nikolić BŽ. Supercapacitive properties of the alkali metal hydroxides-activated carbons obtained from sucrose. in Journal of the Serbian Chemical Society. 2022;87(7-8):867-877.
doi:10.2298/JSC220730059K .

Košević, Milica, Krstić, Sanja, Panić, Vladimir, Nikolić, Branislav Ž., "Supercapacitive properties of the alkali metal hydroxides-activated carbons obtained from sucrose" in Journal of the Serbian Chemical Society, 87, no. 7-8 (2022):867-877,
https://doi.org/10.2298/JSC220730059K . .

TY  - CONF
AU  - Mitterecker, Jonas
AU  - Mihailović, Marija
AU  - Košević, Milica
AU  - Stevanović, Jasmina
AU  - Stopić, Srećko
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4884
AB  - Hydrometallurgical procedure and chemical measurements were employed to study the precipitation behavior of different metals in a lateritic ore pregnant leach solution (PLS). Lateritic ore was leached in 1 M H2SO4 solution at 70 oC by standard leaching process. The leachate was afterwards subjected to the pH adjustment that led to the removal of metal ions by precipitation. Measurements of pH as well as chemical analysis show characteristic values of metal ion removal from the PLS.
AB  - Hidrometalurški postupak luženja lateritne rude uz hemijske analize u rastvoru luženja su korišćeni kako bi se ispitalo ponašanje različitih metala u koncentrovanom rastvoru luženja (PLS). Lateritna ruda podvrgnuta je standardnom postupku luženja u rastvoru 1 M H2SO4 na 70 oC. Iz dobijene lužine su nakon toga taloženi joni metala tokom menjanja pH vrednosti prvobitnog PLS rastvora. Rezultati merenja pH, kao i hemijskih analiza dali su karakteristične vrednosti na kojima je moguće iz PLS rastvora odstraniti određene jone metala.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)
C3  - Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
T1  - Precipitation behaviour in pH adjusted lateritic ore solution
SP  - 190
SP  - 194
UR  - https://hdl.handle.net/21.15107/rcub_cer_4884
ER  - 

@conference{
author = "Mitterecker, Jonas and Mihailović, Marija and Košević, Milica and Stevanović, Jasmina and Stopić, Srećko and Panić, Vladimir and Friedrich, Bernd",
year = "2021",
abstract = "Hydrometallurgical procedure and chemical measurements were employed to study the precipitation behavior of different metals in a lateritic ore pregnant leach solution (PLS). Lateritic ore was leached in 1 M H2SO4 solution at 70 oC by standard leaching process. The leachate was afterwards subjected to the pH adjustment that led to the removal of metal ions by precipitation. Measurements of pH as well as chemical analysis show characteristic values of metal ion removal from the PLS., Hidrometalurški postupak luženja lateritne rude uz hemijske analize u rastvoru luženja su korišćeni kako bi se ispitalo ponašanje različitih metala u koncentrovanom rastvoru luženja (PLS). Lateritna ruda podvrgnuta je standardnom postupku luženja u rastvoru 1 M H2SO4 na 70 oC. Iz dobijene lužine su nakon toga taloženi joni metala tokom menjanja pH vrednosti prvobitnog PLS rastvora. Rezultati merenja pH, kao i hemijskih analiza dali su karakteristične vrednosti na kojima je moguće iz PLS rastvora odstraniti određene jone metala.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)",
journal = "Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija",
title = "Precipitation behaviour in pH adjusted lateritic ore solution",
pages = "190-194",
url = "https://hdl.handle.net/21.15107/rcub_cer_4884"
}

Mitterecker, J., Mihailović, M., Košević, M., Stevanović, J., Stopić, S., Panić, V.,& Friedrich, B.. (2021). Precipitation behaviour in pH adjusted lateritic ore solution. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)., 190.
https://hdl.handle.net/21.15107/rcub_cer_4884

Mitterecker J, Mihailović M, Košević M, Stevanović J, Stopić S, Panić V, Friedrich B. Precipitation behaviour in pH adjusted lateritic ore solution. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija. 2021;:190.
https://hdl.handle.net/21.15107/rcub_cer_4884 .

Mitterecker, Jonas, Mihailović, Marija, Košević, Milica, Stevanović, Jasmina, Stopić, Srećko, Panić, Vladimir, Friedrich, Bernd, "Precipitation behaviour in pH adjusted lateritic ore solution" in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija (2021):190,
https://hdl.handle.net/21.15107/rcub_cer_4884 .

TY  - CONF
AU  - Mitterecker, Jonas
AU  - Košević, Milica
AU  - Mihailović, Marija
AU  - Stevanović, Jasmina
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4885
AB  - Electrochemical measurements were employed to study the possibility of the extraction of metal ions from lateritic ore leachates predominantly rich in Fe in order to separate more noble cobalt and nickel metals. Lateritic ore was leached in 1 M H2SO4 solution at 70 °C by standard leaching process. The leachate was afterwards subjected to the pH adjustment that led to the removal of Fe ions by precipitation. Results obtained from cyclic voltammetry and chronamperometry measurements in native leachate and those with adjusted pH showed that optimal pH value for Fe removal was 3.7.
AB  - Elektrohemijskim merenjima je ispitivana mogućnost izdvajanja kobalta i nikla iz lužine lateritne rude bogate sa Fe. Rastvorne komponente lateritne rude su standardnim procesom luženja, tretiranjem u 1 M rastvoru H2SO4 na povišenoj temperaturi, prevedene u rastvor. U sledećoj fazi prečišćavanja dobijenom rastvoru je podešavana pH vrednost kako bi se joni Fe preveli u talog. Cikličnom voltametrijom i hronoamperometrijom je pokazano da je optimalna vrednost za uklanjanje jona Fe 3,7.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM
C3  - Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
T1  - Electrochemical investigation of lateritic ore leachates for metal ions extraction
SP  - 195
EP  - 198
UR  - https://hdl.handle.net/21.15107/rcub_cer_4885
ER  - 

@conference{
author = "Mitterecker, Jonas and Košević, Milica and Mihailović, Marija and Stevanović, Jasmina and Stopić, Srećko and Friedrich, Bernd and Panić, Vladimir",
year = "2021",
abstract = "Electrochemical measurements were employed to study the possibility of the extraction of metal ions from lateritic ore leachates predominantly rich in Fe in order to separate more noble cobalt and nickel metals. Lateritic ore was leached in 1 M H2SO4 solution at 70 °C by standard leaching process. The leachate was afterwards subjected to the pH adjustment that led to the removal of Fe ions by precipitation. Results obtained from cyclic voltammetry and chronamperometry measurements in native leachate and those with adjusted pH showed that optimal pH value for Fe removal was 3.7., Elektrohemijskim merenjima je ispitivana mogućnost izdvajanja kobalta i nikla iz lužine lateritne rude bogate sa Fe. Rastvorne komponente lateritne rude su standardnim procesom luženja, tretiranjem u 1 M rastvoru H2SO4 na povišenoj temperaturi, prevedene u rastvor. U sledećoj fazi prečišćavanja dobijenom rastvoru je podešavana pH vrednost kako bi se joni Fe preveli u talog. Cikličnom voltametrijom i hronoamperometrijom je pokazano da je optimalna vrednost za uklanjanje jona Fe 3,7.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM",
journal = "Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija",
title = "Electrochemical investigation of lateritic ore leachates for metal ions extraction",
pages = "195-198",
url = "https://hdl.handle.net/21.15107/rcub_cer_4885"
}

Mitterecker, J., Košević, M., Mihailović, M., Stevanović, J., Stopić, S., Friedrich, B.,& Panić, V.. (2021). Electrochemical investigation of lateritic ore leachates for metal ions extraction. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM., 195-198.
https://hdl.handle.net/21.15107/rcub_cer_4885

Mitterecker J, Košević M, Mihailović M, Stevanović J, Stopić S, Friedrich B, Panić V. Electrochemical investigation of lateritic ore leachates for metal ions extraction. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija. 2021;:195-198.
https://hdl.handle.net/21.15107/rcub_cer_4885 .

Mitterecker, Jonas, Košević, Milica, Mihailović, Marija, Stevanović, Jasmina, Stopić, Srećko, Friedrich, Bernd, Panić, Vladimir, "Electrochemical investigation of lateritic ore leachates for metal ions extraction" in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija (2021):195-198,
https://hdl.handle.net/21.15107/rcub_cer_4885 .

TY  - THES
AU  - Košević, Milica
PY  - 2021
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=8155
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:23800/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=39963913
UR  - https://nardus.mpn.gov.rs/handle/123456789/18356
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4931
AB  - Ispitivana su svojstva titan(IV)-oksida i njegove karakteristike kao mogućeg interaktivnog i stabilnog nosača za RuO2 i Pt kao elektrokatalizatora u reakcijama od značaja za industrijsku elektrohemiju i alternativne izvore energije. Analizirano je i razmatrano kako u slučaju kompozita RuO2/TiO2 i Pt/TiO2, sintetizovanih na takav način da se dobijaju njihove uređene strukture, TiO2 služi kao stabilišuće i interaktivno jezgro, a RuO2, odnosno Pt, kao elektrokatalitički aktivna komponenta.Kompoziti RuO2/TiO2 i Pt/TiO2 su sintetizovani različitim hidrotermalnim metodama, koje uključuju temperaturno kontrolisan prelaz aerosolova i hidrosolova u čvrstu fazu. Kod kompozita RuO2/TiO2 se ispitivao uticaj temperature u pirolitičkom reaktoru na morfologiju dobijenog kompozita RuO2/TiO2 i stabilnost anoda koje su dobijene nanošenjem ovako dobijenog kompozita na Ti podlogu.Svojstva dobijenih kompozita analizirana su u zavisnosti od toga da li su sve faze sintetizovane u jednom koraku (in-situ) ili je faza nosača TiO2 sintetizovana prethodno (ex-situ). Strukturno-morfološka svojstva dobijenih materijala ispitivana su mikroskopskim tehnikama (SEM, TEM), analizom interakcije materijala sa elektromagnetnim zračenjem (FTIR, XRD, DLS, ramanska spektroskopija) i termogravimetrijskom analizom. Elektrohemijske karakteristike ispitivane su analizom nefaradejskog odziva i elektrokatalitičke aktivnosti i stabilnosti u reakcijama izdvajanja hlora i kiseonika (RuO2/TiO2), odnosno redukcije kiseonika i izdvajanja vodonika (Pt/TiO2).Nađeno je da se svi kompoziti dobijaju u obliku sferoidnih čestica/aglomerata, bez obzira na postupak dobijanja. Uređenost i ravnomernost strukture zavise od primenjenog postupka pripreme, kao i temperature prelaza u čvrstu fazu.Elektrohemijskim karakteristikama RuO2/TiO2 pogoduje niža temperatura pirolitičke sinteze, iako je utvrđeno da u tom slučaju izostaje potpuna konverzija prekursora rutenijuma u odgovarajući oksid. RuO2/TiO2 dobijen na nižoj temperaturi se pokazao stabilnijim, sa boljim kapacitivnim karakteristikama, usled karakteristične raspodele komponenti i faza kroz zapreminu matičnih sferoidnih strukturnih oblika kompozita. Za nominalno isti sastav RuO2/TiO2 dobijen na nižoj i višoj temperaturi, razmatrano je kako elektrohemijske karakteristike zavise od mikroskopske raspodele oksidnih komponenti kroz sferične aglomerate. Takođe, ovi nalazi diskutovani su uzimajući u obzir i kristalno stanje TiO2 u formi anatasa, koji pretežno čini jezgro ovih aglomerata.Kod kompozita Pt/TiO2 se ispitivao uticaj temperature sinteze i tipa sinteze na morfološka svojstva dobijenog kompozita i njegovu elektrokatalitičku aktivnost. Svi dobijeni kompoziti su bili sfernog oblika, nezavisno od primenjenih uslova sinteze. U ex-situ pristupu USP sintezi se dobijaju pravilna sferna jezgra čija je površina prekrivena ljuskom u vidu nanometarskih platinskih čestica, dok se in-situ pristupom dobija smeša većih šupljih sfera i manjih čvrstih sfera. Najbolja elektrokatalitička svojstva pokazuje kompozit sintetizovan ex-situ pristupom na umerenoj temperaturi.
AB  - Properties and characteristics of titanium(IV) oxide, as posible interactive and stable support for RuO2 and Pt electrocatalysts, are studied. RuO2 and Pt are important electrocatalytic materials, often used in industrial electrochemistry and alternative power sources. It was found that in Pt/TiO2 and RuO2/TiO2 composites synthesized in a way which enables highly ordered structures TiO2 acts like a stabilising and interactive core, while Pt and RuO2 are electrocatalyticaly active components encapsulating the core. As supporting component in both Pt/TiO2 and RuO2/TiO2 composites, TiO2 synthesis and its characterisation is performed separately.RuO2/TiO2 and Pt/TiO2 composites are synthesiezed using varouis hydrothermal approches consisting of temperature-controled conversion of aerosols and hydrosols to the solid phase. In the case of RuO2/TiO2 composite, influence of synthesis temperature on the morphology of the obtained composites was studied. Influence of the synthesis temperature on the stability of activated Ti anodes coated by obtained composites was examined as well.Dependance of the properties of the obtained composites on the applied synthesis approach was investigated. In-situ approach as one-step synthesis is applied along with the ex-situ approach, which implies that at least supporting component, TiO2, has been prepared prior to the composite synthesis. Strucutral and morphological properties of the obtained materials were tested using SEM, TEM, FTIR, XRD, DLS, Raman and TGA techniques. Electrochemical characterization involved the analysis of non-Faradaic response and electrocatalytic activity and stability in chlorine and oxygen evolution reactions (RuO2/TiO2), as well as oxygen reduction and hydrogen evolution reactions (Pt/TiO2).It was found that all synthesized composites had spherical shape, independently of the synthesis method. Structure arrangement and uniformity depend on the applied approach, as well as on the synthesis temperature. Although conversion of ruthenium precursor to coresponding oxide was not complete at lower synthesis temperature, this temperature is beneficial for electrochemical characteristics of the RuO2/TiO2 composite. Namely, RuO2/TiO2 composite synthesiezed at lower temperature had better stability and capacitive characteristics.Influence of the microscopic distribution of the oxide components throughout the spherical agglomerates on the electrochemical characteristics of the RuO2/TiO2 composites synthesized at two different temperatures, with same nominal composition, was investigated. In addition, the disscusion takes into account the influence of the anatase TiO2 that cores are primary consisted of.Influence of the synthesis temperature and method on the morphological properties and electrocatalytic activity of the obtained Pt/TiO2 composites were examined. All of the prepared composites were of spherical shape, independently of the applied conditions. Regular spherical cores covered by a shell of nanometric platinum particles were obtained by ex-situ approach, whereas in-situ aproach resulted in mixture of huge hollow speheres and smaller all-solid spheres. The most promising electocatalytical properties were obtained by ex-situ USP method at moderate temperatures.
PB  - Универзитет у Београду, Технолошко-металуршки факултет
T2  - Универзитет у Београду
T1  - Sinteza i karakterizacija strukturno uređenih interaktivnih elektrokatalitičkih kompozita zasnovanih na oksidima metala i platini
UR  - https://hdl.handle.net/21.15107/rcub_nardus_18356
ER  - 

@phdthesis{
author = "Košević, Milica",
year = "2021",
abstract = "Ispitivana su svojstva titan(IV)-oksida i njegove karakteristike kao mogućeg interaktivnog i stabilnog nosača za RuO2 i Pt kao elektrokatalizatora u reakcijama od značaja za industrijsku elektrohemiju i alternativne izvore energije. Analizirano je i razmatrano kako u slučaju kompozita RuO2/TiO2 i Pt/TiO2, sintetizovanih na takav način da se dobijaju njihove uređene strukture, TiO2 služi kao stabilišuće i interaktivno jezgro, a RuO2, odnosno Pt, kao elektrokatalitički aktivna komponenta.Kompoziti RuO2/TiO2 i Pt/TiO2 su sintetizovani različitim hidrotermalnim metodama, koje uključuju temperaturno kontrolisan prelaz aerosolova i hidrosolova u čvrstu fazu. Kod kompozita RuO2/TiO2 se ispitivao uticaj temperature u pirolitičkom reaktoru na morfologiju dobijenog kompozita RuO2/TiO2 i stabilnost anoda koje su dobijene nanošenjem ovako dobijenog kompozita na Ti podlogu.Svojstva dobijenih kompozita analizirana su u zavisnosti od toga da li su sve faze sintetizovane u jednom koraku (in-situ) ili je faza nosača TiO2 sintetizovana prethodno (ex-situ). Strukturno-morfološka svojstva dobijenih materijala ispitivana su mikroskopskim tehnikama (SEM, TEM), analizom interakcije materijala sa elektromagnetnim zračenjem (FTIR, XRD, DLS, ramanska spektroskopija) i termogravimetrijskom analizom. Elektrohemijske karakteristike ispitivane su analizom nefaradejskog odziva i elektrokatalitičke aktivnosti i stabilnosti u reakcijama izdvajanja hlora i kiseonika (RuO2/TiO2), odnosno redukcije kiseonika i izdvajanja vodonika (Pt/TiO2).Nađeno je da se svi kompoziti dobijaju u obliku sferoidnih čestica/aglomerata, bez obzira na postupak dobijanja. Uređenost i ravnomernost strukture zavise od primenjenog postupka pripreme, kao i temperature prelaza u čvrstu fazu.Elektrohemijskim karakteristikama RuO2/TiO2 pogoduje niža temperatura pirolitičke sinteze, iako je utvrđeno da u tom slučaju izostaje potpuna konverzija prekursora rutenijuma u odgovarajući oksid. RuO2/TiO2 dobijen na nižoj temperaturi se pokazao stabilnijim, sa boljim kapacitivnim karakteristikama, usled karakteristične raspodele komponenti i faza kroz zapreminu matičnih sferoidnih strukturnih oblika kompozita. Za nominalno isti sastav RuO2/TiO2 dobijen na nižoj i višoj temperaturi, razmatrano je kako elektrohemijske karakteristike zavise od mikroskopske raspodele oksidnih komponenti kroz sferične aglomerate. Takođe, ovi nalazi diskutovani su uzimajući u obzir i kristalno stanje TiO2 u formi anatasa, koji pretežno čini jezgro ovih aglomerata.Kod kompozita Pt/TiO2 se ispitivao uticaj temperature sinteze i tipa sinteze na morfološka svojstva dobijenog kompozita i njegovu elektrokatalitičku aktivnost. Svi dobijeni kompoziti su bili sfernog oblika, nezavisno od primenjenih uslova sinteze. U ex-situ pristupu USP sintezi se dobijaju pravilna sferna jezgra čija je površina prekrivena ljuskom u vidu nanometarskih platinskih čestica, dok se in-situ pristupom dobija smeša većih šupljih sfera i manjih čvrstih sfera. Najbolja elektrokatalitička svojstva pokazuje kompozit sintetizovan ex-situ pristupom na umerenoj temperaturi., Properties and characteristics of titanium(IV) oxide, as posible interactive and stable support for RuO2 and Pt electrocatalysts, are studied. RuO2 and Pt are important electrocatalytic materials, often used in industrial electrochemistry and alternative power sources. It was found that in Pt/TiO2 and RuO2/TiO2 composites synthesized in a way which enables highly ordered structures TiO2 acts like a stabilising and interactive core, while Pt and RuO2 are electrocatalyticaly active components encapsulating the core. As supporting component in both Pt/TiO2 and RuO2/TiO2 composites, TiO2 synthesis and its characterisation is performed separately.RuO2/TiO2 and Pt/TiO2 composites are synthesiezed using varouis hydrothermal approches consisting of temperature-controled conversion of aerosols and hydrosols to the solid phase. In the case of RuO2/TiO2 composite, influence of synthesis temperature on the morphology of the obtained composites was studied. Influence of the synthesis temperature on the stability of activated Ti anodes coated by obtained composites was examined as well.Dependance of the properties of the obtained composites on the applied synthesis approach was investigated. In-situ approach as one-step synthesis is applied along with the ex-situ approach, which implies that at least supporting component, TiO2, has been prepared prior to the composite synthesis. Strucutral and morphological properties of the obtained materials were tested using SEM, TEM, FTIR, XRD, DLS, Raman and TGA techniques. Electrochemical characterization involved the analysis of non-Faradaic response and electrocatalytic activity and stability in chlorine and oxygen evolution reactions (RuO2/TiO2), as well as oxygen reduction and hydrogen evolution reactions (Pt/TiO2).It was found that all synthesized composites had spherical shape, independently of the synthesis method. Structure arrangement and uniformity depend on the applied approach, as well as on the synthesis temperature. Although conversion of ruthenium precursor to coresponding oxide was not complete at lower synthesis temperature, this temperature is beneficial for electrochemical characteristics of the RuO2/TiO2 composite. Namely, RuO2/TiO2 composite synthesiezed at lower temperature had better stability and capacitive characteristics.Influence of the microscopic distribution of the oxide components throughout the spherical agglomerates on the electrochemical characteristics of the RuO2/TiO2 composites synthesized at two different temperatures, with same nominal composition, was investigated. In addition, the disscusion takes into account the influence of the anatase TiO2 that cores are primary consisted of.Influence of the synthesis temperature and method on the morphological properties and electrocatalytic activity of the obtained Pt/TiO2 composites were examined. All of the prepared composites were of spherical shape, independently of the applied conditions. Regular spherical cores covered by a shell of nanometric platinum particles were obtained by ex-situ approach, whereas in-situ aproach resulted in mixture of huge hollow speheres and smaller all-solid spheres. The most promising electocatalytical properties were obtained by ex-situ USP method at moderate temperatures.",
publisher = "Универзитет у Београду, Технолошко-металуршки факултет",
journal = "Универзитет у Београду",
title = "Sinteza i karakterizacija strukturno uređenih interaktivnih elektrokatalitičkih kompozita zasnovanih na oksidima metala i platini",
url = "https://hdl.handle.net/21.15107/rcub_nardus_18356"
}

Košević, M.. (2021). Sinteza i karakterizacija strukturno uređenih interaktivnih elektrokatalitičkih kompozita zasnovanih na oksidima metala i platini. in Универзитет у Београду
Универзитет у Београду, Технолошко-металуршки факултет..
https://hdl.handle.net/21.15107/rcub_nardus_18356

Košević M. Sinteza i karakterizacija strukturno uređenih interaktivnih elektrokatalitičkih kompozita zasnovanih na oksidima metala i platini. in Универзитет у Београду. 2021;.
https://hdl.handle.net/21.15107/rcub_nardus_18356 .

Košević, Milica, "Sinteza i karakterizacija strukturno uređenih interaktivnih elektrokatalitičkih kompozita zasnovanih na oksidima metala i platini" in Универзитет у Београду (2021),
https://hdl.handle.net/21.15107/rcub_nardus_18356 .

TY  - CONF
AU  - Božić, Katarina
AU  - Košević, Milica
AU  - Zarić, Milana
AU  - Panić, Vladimir
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6499
AB  - Owing to a wide range of application in kinetics (photocatalysis, electrocatalysis, etc.), it is of high importance to define in details corelation between structure and synthesis of TiO2 particles. The aim is to elucidate the kinetics of TiO2 solid phase formation by sol-gel approach as newly-structured suitable carrier of batteries/fuel cells electrocatalytic materials. TiO2 nanoparticles were synthesized from TiCl3 precursor under different conditions (concentration, pH) in an aqueous medium. Formation of a new solid phase was continuously monitored by a dynamic conductometric measurements induced by high frequency impedance sinusoidal voltage perturbations of a conductometric cell. The particle size distributions of the obtained TiO2 sols were characterized by the dynamic light scattering method, while the microstructure data were obtained by the scanning electron microscopy. The typical change of high frequency impedance during TiO2 synthesis is presented in Figure 1. It was found that the process proceeds through at least five phases (I–V, Figure 1, seen as high frequency impedance decrease) of different rates and durability, which depend on synthesis conditions.
PB  - Zagreb, Croatia : Croatian Society of Chemical Engineers
C3  - Book of abstracts - 10th ISE Satellite Student Regional Symposium on Electrochemistry, 2nd July, Zagreb, Croatia
T1  - A novel approach for the study of the kinetics of sol-gel synthesis of titanium dioxide nanoparticles as catalyst support
SP  - 5
EP  - 5
UR  - https://hdl.handle.net/21.15107/rcub_cer_6499
ER  - 

@conference{
author = "Božić, Katarina and Košević, Milica and Zarić, Milana and Panić, Vladimir",
year = "2021",
abstract = "Owing to a wide range of application in kinetics (photocatalysis, electrocatalysis, etc.), it is of high importance to define in details corelation between structure and synthesis of TiO2 particles. The aim is to elucidate the kinetics of TiO2 solid phase formation by sol-gel approach as newly-structured suitable carrier of batteries/fuel cells electrocatalytic materials. TiO2 nanoparticles were synthesized from TiCl3 precursor under different conditions (concentration, pH) in an aqueous medium. Formation of a new solid phase was continuously monitored by a dynamic conductometric measurements induced by high frequency impedance sinusoidal voltage perturbations of a conductometric cell. The particle size distributions of the obtained TiO2 sols were characterized by the dynamic light scattering method, while the microstructure data were obtained by the scanning electron microscopy. The typical change of high frequency impedance during TiO2 synthesis is presented in Figure 1. It was found that the process proceeds through at least five phases (I–V, Figure 1, seen as high frequency impedance decrease) of different rates and durability, which depend on synthesis conditions.",
publisher = "Zagreb, Croatia : Croatian Society of Chemical Engineers",
journal = "Book of abstracts - 10th ISE Satellite Student Regional Symposium on Electrochemistry, 2nd July, Zagreb, Croatia",
title = "A novel approach for the study of the kinetics of sol-gel synthesis of titanium dioxide nanoparticles as catalyst support",
pages = "5-5",
url = "https://hdl.handle.net/21.15107/rcub_cer_6499"
}

Božić, K., Košević, M., Zarić, M.,& Panić, V.. (2021). A novel approach for the study of the kinetics of sol-gel synthesis of titanium dioxide nanoparticles as catalyst support. in Book of abstracts - 10th ISE Satellite Student Regional Symposium on Electrochemistry, 2nd July, Zagreb, Croatia
Zagreb, Croatia : Croatian Society of Chemical Engineers., 5-5.
https://hdl.handle.net/21.15107/rcub_cer_6499

Božić K, Košević M, Zarić M, Panić V. A novel approach for the study of the kinetics of sol-gel synthesis of titanium dioxide nanoparticles as catalyst support. in Book of abstracts - 10th ISE Satellite Student Regional Symposium on Electrochemistry, 2nd July, Zagreb, Croatia. 2021;:5-5.
https://hdl.handle.net/21.15107/rcub_cer_6499 .

Božić, Katarina, Košević, Milica, Zarić, Milana, Panić, Vladimir, "A novel approach for the study of the kinetics of sol-gel synthesis of titanium dioxide nanoparticles as catalyst support" in Book of abstracts - 10th ISE Satellite Student Regional Symposium on Electrochemistry, 2nd July, Zagreb, Croatia (2021):5-5,
https://hdl.handle.net/21.15107/rcub_cer_6499 .

TY  - JOUR
AU  - Košević, Milica
AU  - Zarić, Milana
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina S.
AU  - Weirich, Thomas E.
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4430
AB  - Pt/TiO2 composites were synthesized by single-step ultrasonic spray pyrolysis (USP) at different temperatures. In an in-situ method, Pt and TiO2 particles were generated from tetra-n-butyl orthotitanate and chloroplatinic acid, and hydrothermally-prepared TiO2 colloidal dispersion served as Pt support in an ex-situ USP approach. USP-synthesized Pt/TiO2 composites were generated in the form of a solid mixture, morphologically organized in nesting huge hollow and small solid spheres, or TiO2 core/Pt shell regular spheroids by in-situ or ex-situ method, respectively. This paper exclusively reports on characteristic mechanisms of the formation of novel two-component solid composites, which are intrinsic from the USP approach and controlled precursor composition. The generation of the two morphological components within the in-situ approach, the hollow spheres and all-solid spheres, was indicated to be caused by characteristic sol-gel/solid phase transition of TiO2 . Both the walls of the hollow spheres and the cores of all-solid ones consist of TiO2 matrix populated by 10 nm-sized Pt. On the other hand, spherical, uniformly-sized, Pt particles of a few nanometers in size created a shell uniformly deposited onto TiO2 spheres of ca. 150 nm size. Activities of the prepared samples in an oxygen reduction reaction and combined oxygen reduction and hydrogen evolution reactions were electrochemically tested. The ex-situ synthesized Pt/TiO2 was more active for oxygen reduction and combined oxygen reduction and hydrogen reactions in comparison to the in-situ Pt/TiO2 samples, due to better availability of Pt within a core/shell structure for the reactions.
PB  - MDPI
T2  - Metals
T1  - Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis
VL  - 10
IS  - 1
SP  - 11
DO  - 10.3390/met10010011
ER  - 

@article{
author = "Košević, Milica and Zarić, Milana and Stopić, Srećko and Stevanović, Jasmina S. and Weirich, Thomas E. and Friedrich, Bernd and Panić, Vladimir",
year = "2020",
abstract = "Pt/TiO2 composites were synthesized by single-step ultrasonic spray pyrolysis (USP) at different temperatures. In an in-situ method, Pt and TiO2 particles were generated from tetra-n-butyl orthotitanate and chloroplatinic acid, and hydrothermally-prepared TiO2 colloidal dispersion served as Pt support in an ex-situ USP approach. USP-synthesized Pt/TiO2 composites were generated in the form of a solid mixture, morphologically organized in nesting huge hollow and small solid spheres, or TiO2 core/Pt shell regular spheroids by in-situ or ex-situ method, respectively. This paper exclusively reports on characteristic mechanisms of the formation of novel two-component solid composites, which are intrinsic from the USP approach and controlled precursor composition. The generation of the two morphological components within the in-situ approach, the hollow spheres and all-solid spheres, was indicated to be caused by characteristic sol-gel/solid phase transition of TiO2 . Both the walls of the hollow spheres and the cores of all-solid ones consist of TiO2 matrix populated by 10 nm-sized Pt. On the other hand, spherical, uniformly-sized, Pt particles of a few nanometers in size created a shell uniformly deposited onto TiO2 spheres of ca. 150 nm size. Activities of the prepared samples in an oxygen reduction reaction and combined oxygen reduction and hydrogen evolution reactions were electrochemically tested. The ex-situ synthesized Pt/TiO2 was more active for oxygen reduction and combined oxygen reduction and hydrogen reactions in comparison to the in-situ Pt/TiO2 samples, due to better availability of Pt within a core/shell structure for the reactions.",
publisher = "MDPI",
journal = "Metals",
title = "Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis",
volume = "10",
number = "1",
pages = "11",
doi = "10.3390/met10010011"
}

Košević, M., Zarić, M., Stopić, S., Stevanović, J. S., Weirich, T. E., Friedrich, B.,& Panić, V.. (2020). Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis. in Metals
MDPI., 10(1), 11.
https://doi.org/10.3390/met10010011

Košević M, Zarić M, Stopić S, Stevanović JS, Weirich TE, Friedrich B, Panić V. Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis. in Metals. 2020;10(1):11.
doi:10.3390/met10010011 .

Košević, Milica, Zarić, Milana, Stopić, Srećko, Stevanović, Jasmina S., Weirich, Thomas E., Friedrich, Bernd, Panić, Vladimir, "Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis" in Metals, 10, no. 1 (2020):11,
https://doi.org/10.3390/met10010011 . .

TY  - JOUR
AU  - Košević, Milica
AU  - Stopić, Srećko
AU  - Cvetković, Vesna S.
AU  - Schroeder, Michael
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2500
AB  - Uniformly-shaped, spherical RuO2/TiO2 particles were synthesized exclusively by one-step ultrasonic spray pyrolysis USP) of a mixture of n-butylorthotitanate and ruthenium chloride acidic aqueous solutions. The USP temperature was 200 degrees C -quite below the typical conversion temperatures of the precursors to the oxides. Basic electrochemical properties of RuO2/TiO2 USP powders as-prepared or additionally dried and/or thermally treated) in the form of a thin layer applied onto glassy carbon electrode are investigated and compared to the properties of powder synthesized at quite higher temperature of 800 degrees C. The coatings of activated titanium anode ATA) were prepared from RuO2/TiO2 USP powders in order to check the anode electrolysis stability and to correlate the anode properties to those of native USP powders. Low-temperature material showed much better performances than high-temperature one. ATA obtained from low-temperature USP powder showed considerably higher stability. The obtained results are found to be in close correlation to the powder and coating structure, composition and morphology affected by subsequent thermal treatment of the material synthesized at low USP temperature.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances
VL  - 464
SP  - 1
EP  - 9
DO  - 10.1016/j.apsusc.2018.09.066
ER  - 

@article{
author = "Košević, Milica and Stopić, Srećko and Cvetković, Vesna S. and Schroeder, Michael and Stevanović, Jasmina and Panić, Vladimir and Friedrich, Bernd",
year = "2019",
abstract = "Uniformly-shaped, spherical RuO2/TiO2 particles were synthesized exclusively by one-step ultrasonic spray pyrolysis USP) of a mixture of n-butylorthotitanate and ruthenium chloride acidic aqueous solutions. The USP temperature was 200 degrees C -quite below the typical conversion temperatures of the precursors to the oxides. Basic electrochemical properties of RuO2/TiO2 USP powders as-prepared or additionally dried and/or thermally treated) in the form of a thin layer applied onto glassy carbon electrode are investigated and compared to the properties of powder synthesized at quite higher temperature of 800 degrees C. The coatings of activated titanium anode ATA) were prepared from RuO2/TiO2 USP powders in order to check the anode electrolysis stability and to correlate the anode properties to those of native USP powders. Low-temperature material showed much better performances than high-temperature one. ATA obtained from low-temperature USP powder showed considerably higher stability. The obtained results are found to be in close correlation to the powder and coating structure, composition and morphology affected by subsequent thermal treatment of the material synthesized at low USP temperature.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances",
volume = "464",
pages = "1-9",
doi = "10.1016/j.apsusc.2018.09.066"
}

Košević, M., Stopić, S., Cvetković, V. S., Schroeder, M., Stevanović, J., Panić, V.,& Friedrich, B.. (2019). Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances. in Applied Surface Science
Elsevier., 464, 1-9.
https://doi.org/10.1016/j.apsusc.2018.09.066

Košević M, Stopić S, Cvetković VS, Schroeder M, Stevanović J, Panić V, Friedrich B. Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances. in Applied Surface Science. 2019;464:1-9.
doi:10.1016/j.apsusc.2018.09.066 .

Košević, Milica, Stopić, Srećko, Cvetković, Vesna S., Schroeder, Michael, Stevanović, Jasmina, Panić, Vladimir, Friedrich, Bernd, "Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances" in Applied Surface Science, 464 (2019):1-9,
https://doi.org/10.1016/j.apsusc.2018.09.066 . .

TY  - CHAP
AU  - Košević, Milica
AU  - Pavelkić, Vesna
AU  - Friedrich, Bernd
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4359
AB  - Activated titanium anodes, commercially known as dimensionally stable anodes (DSA®), are one of the most important discoveries in the field of applied electrochemistry of the 20th Century. These anodes are widely used for chlorine production in chlor-alkali industry, oxygen evolution reaction in electrowinnung processes and in electrochemical remediation of water and soil. DSAs consist of the mixed ruthenium−titanium oxide (RuO2–TiO2) coatings, oftenly doped with additional noble and/or transition metal oxides, deposited onto Ti surface. Structural, electocatlytic and capacitive properties of activated titanium anodes, prepared from oxides obtained by various synthesis methods, are investigated. These methods include sol–gel procedure, MW-assisted synthesis of the oxide from aqueous chloride solution and ultrasonic spray pyrolysis (USP). Microscopic investigations of the oxide sols and coatings showed that the aging time of the sols defines the coating morphology and, consequently, the electrochemical behavior of a coating. Better electrochemical characteristics, including anode stability in electrolysis, were registered for a combination of small RuO2 and large TiO2 sol–gel processed particles. Deactivation of an anode is manifested by an increased coating resistance and decreased electrochemically active surface area. The increase in the coating resistance is more pronounced for traditional coatings prepared by pyrolysis of metal chlorides, while sol–gel prepared coatings show more pronounced decrease in the electrochemically active surface area. The initial increase in coating resistance is caused by the dissolution of Ru species from the coating surface facing the electrolyte, which restricts the coating activity to the active sites from the interior of the coating (within the porous structure). It is shown that spray pyrolytic synthesis methods, e.g., ultrasonic spray pyrolysis, are versatile and applicable synthetic techniques for creating novel, rationally designed, RuO2–TiO2 material structures. Synthesized USP powders consisted of separated anatase and rutile phases, with anatase structure preserved even at 800 °C in the core of spherical particles onto which crystalline RuO2 preferentially grows.
PB  -  New York, USA : Nova Science Publishers Inc.
T2  - Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics
T1  - Structural, Electrocatalytic and Capacitive Properties of Ruthenium/Titanium-Oxide Based Electrodes Synthesized by Novel Methods
SP  - 161
EP  - 198
UR  - https://hdl.handle.net/21.15107/rcub_cer_4359
ER  - 

@inbook{
author = "Košević, Milica and Pavelkić, Vesna and Friedrich, Bernd",
year = "2019",
abstract = "Activated titanium anodes, commercially known as dimensionally stable anodes (DSA®), are one of the most important discoveries in the field of applied electrochemistry of the 20th Century. These anodes are widely used for chlorine production in chlor-alkali industry, oxygen evolution reaction in electrowinnung processes and in electrochemical remediation of water and soil. DSAs consist of the mixed ruthenium−titanium oxide (RuO2–TiO2) coatings, oftenly doped with additional noble and/or transition metal oxides, deposited onto Ti surface. Structural, electocatlytic and capacitive properties of activated titanium anodes, prepared from oxides obtained by various synthesis methods, are investigated. These methods include sol–gel procedure, MW-assisted synthesis of the oxide from aqueous chloride solution and ultrasonic spray pyrolysis (USP). Microscopic investigations of the oxide sols and coatings showed that the aging time of the sols defines the coating morphology and, consequently, the electrochemical behavior of a coating. Better electrochemical characteristics, including anode stability in electrolysis, were registered for a combination of small RuO2 and large TiO2 sol–gel processed particles. Deactivation of an anode is manifested by an increased coating resistance and decreased electrochemically active surface area. The increase in the coating resistance is more pronounced for traditional coatings prepared by pyrolysis of metal chlorides, while sol–gel prepared coatings show more pronounced decrease in the electrochemically active surface area. The initial increase in coating resistance is caused by the dissolution of Ru species from the coating surface facing the electrolyte, which restricts the coating activity to the active sites from the interior of the coating (within the porous structure). It is shown that spray pyrolytic synthesis methods, e.g., ultrasonic spray pyrolysis, are versatile and applicable synthetic techniques for creating novel, rationally designed, RuO2–TiO2 material structures. Synthesized USP powders consisted of separated anatase and rutile phases, with anatase structure preserved even at 800 °C in the core of spherical particles onto which crystalline RuO2 preferentially grows.",
publisher = " New York, USA : Nova Science Publishers Inc.",
journal = "Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics",
booktitle = "Structural, Electrocatalytic and Capacitive Properties of Ruthenium/Titanium-Oxide Based Electrodes Synthesized by Novel Methods",
pages = "161-198",
url = "https://hdl.handle.net/21.15107/rcub_cer_4359"
}

Košević, M., Pavelkić, V.,& Friedrich, B.. (2019). Structural, Electrocatalytic and Capacitive Properties of Ruthenium/Titanium-Oxide Based Electrodes Synthesized by Novel Methods. in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics
 New York, USA : Nova Science Publishers Inc.., 161-198.
https://hdl.handle.net/21.15107/rcub_cer_4359

Košević M, Pavelkić V, Friedrich B. Structural, Electrocatalytic and Capacitive Properties of Ruthenium/Titanium-Oxide Based Electrodes Synthesized by Novel Methods. in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics. 2019;:161-198.
https://hdl.handle.net/21.15107/rcub_cer_4359 .

Košević, Milica, Pavelkić, Vesna, Friedrich, Bernd, "Structural, Electrocatalytic and Capacitive Properties of Ruthenium/Titanium-Oxide Based Electrodes Synthesized by Novel Methods" in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics (2019):161-198,
https://hdl.handle.net/21.15107/rcub_cer_4359 .

TY  - JOUR
AU  - Košević, Milica
AU  - Vukićević, Nataša
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
AU  - Nikolić, Branislav
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3039
AB  - Spherical TiO2/RuO2 particles were synthesized by ultrasonic spray pyrolysis (USP) at 200 and 800◦C. The activity for the oxygen and chlorine evolution reactions (OER and CER, respectively) and the dynamic responses from electrochemical impedance spectroscopy (EIS) of the USP powders, as well as of the corresponding coatings on Ti, were analyzed and are discussed. The loss of coating activity is discussed with respect to the differences in the EIS and cyclic voltammetry responses of the coatings in their active and inactive states. The 800°C-USP sample was found to be more active than the 200°C-USP sample for both the CER and the OER, whereas the stability of the former was considerably lower. The correlation between the structure, composition and morphology of the powder and the coating with the registered electrochemical properties is discussed. The EIS analysis of the coating resistance distributions induced by the thermal treatment of the powder indicated a complex combination of the pore resistance and the pseudocapacitive charge transfer resistance. An additional coating resistance, due to loose grain boundaries, was introduced into the coatings in their active and inactive state. The EIS analysis indicated the changes in TiO2-enriched core/RuO2-enriched shell structure, caused by the USP temperature. © The Author(s) 2018. Published by ECS.
PB  - Electrochemical Society
T2  - Journal of The Electrochemical Society
T1  - Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres
VL  - 165
IS  - 15
SP  - J3363
EP  - J3370
DO  - 10.1149/2.0521815jes
ER  - 

@article{
author = "Košević, Milica and Vukićević, Nataša and Stopić, Srećko and Stevanović, Jasmina and Friedrich, Bernd and Panić, Vladimir and Nikolić, Branislav",
year = "2018",
abstract = "Spherical TiO2/RuO2 particles were synthesized by ultrasonic spray pyrolysis (USP) at 200 and 800◦C. The activity for the oxygen and chlorine evolution reactions (OER and CER, respectively) and the dynamic responses from electrochemical impedance spectroscopy (EIS) of the USP powders, as well as of the corresponding coatings on Ti, were analyzed and are discussed. The loss of coating activity is discussed with respect to the differences in the EIS and cyclic voltammetry responses of the coatings in their active and inactive states. The 800°C-USP sample was found to be more active than the 200°C-USP sample for both the CER and the OER, whereas the stability of the former was considerably lower. The correlation between the structure, composition and morphology of the powder and the coating with the registered electrochemical properties is discussed. The EIS analysis of the coating resistance distributions induced by the thermal treatment of the powder indicated a complex combination of the pore resistance and the pseudocapacitive charge transfer resistance. An additional coating resistance, due to loose grain boundaries, was introduced into the coatings in their active and inactive state. The EIS analysis indicated the changes in TiO2-enriched core/RuO2-enriched shell structure, caused by the USP temperature. © The Author(s) 2018. Published by ECS.",
publisher = "Electrochemical Society",
journal = "Journal of The Electrochemical Society",
title = "Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres",
volume = "165",
number = "15",
pages = "J3363-J3370",
doi = "10.1149/2.0521815jes"
}

Košević, M., Vukićević, N., Stopić, S., Stevanović, J., Friedrich, B., Panić, V.,& Nikolić, B.. (2018). Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres. in Journal of The Electrochemical Society
Electrochemical Society., 165(15), J3363-J3370.
https://doi.org/10.1149/2.0521815jes

Košević M, Vukićević N, Stopić S, Stevanović J, Friedrich B, Panić V, Nikolić B. Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres. in Journal of The Electrochemical Society. 2018;165(15):J3363-J3370.
doi:10.1149/2.0521815jes .

Košević, Milica, Vukićević, Nataša, Stopić, Srećko, Stevanović, Jasmina, Friedrich, Bernd, Panić, Vladimir, Nikolić, Branislav, "Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres" in Journal of The Electrochemical Society, 165, no. 15 (2018):J3363-J3370,
https://doi.org/10.1149/2.0521815jes . .

TY  - JOUR
AU  - Šekularac, Gavrilo
AU  - Košević, Milica
AU  - Dekanski, Aleksandar
AU  - Đokić, Veljko
AU  - Panjan, Matjaz
AU  - Panić, Vladimir
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2096
AB  - A simple one-step microwave-assisted and temperature-controlled hydrothermal synthesis was applied to prepare a nanocrystalline RuO2 dispersion from an aqueous solution of RuCl3 for supercapacitive applications. The obtained RuO2 dispersions were subjected to dynamic light scattering in order to analyze the particle size distribution, whereas morphology and structural properties of the solid phase were investigated by using AFM, SEM, EDX, TEM, and XRD techniques. Ellipsoidally shaped 100-500 nm-sized compact grains, joined into highly ordered prismatic agglomerates, are observed. Two types of grains are observed: more regular ones consisting of spherical, amorphous particles of a few nanometers in size, and irregular ones made of partially crystalline 10-80 nm-sized particles. Consequently, the most dominant structure is 250-nm grains. The particles tend to join tightly across their crystalline domains, which appears responsible for the formation of prismatic shapes of several micrometers. This arraying causes high capacitive activity - specific capacitances of up to 800 Fg(-1) are registered, which negligibly depend on the charging/discharging rate. The synthesized material is of highly accessible internal structure, and is an excellent candidate for both low- and high-power applications.
PB  - Wiley-V C H Verlag Gmbh, Weinheim
T2  - Chemelectrochem
T1  - High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis
VL  - 4
IS  - 10
SP  - 2535
EP  - 2541
DO  - 10.1002/celc.201700609
ER  - 

@article{
author = "Šekularac, Gavrilo and Košević, Milica and Dekanski, Aleksandar and Đokić, Veljko and Panjan, Matjaz and Panić, Vladimir",
year = "2017",
abstract = "A simple one-step microwave-assisted and temperature-controlled hydrothermal synthesis was applied to prepare a nanocrystalline RuO2 dispersion from an aqueous solution of RuCl3 for supercapacitive applications. The obtained RuO2 dispersions were subjected to dynamic light scattering in order to analyze the particle size distribution, whereas morphology and structural properties of the solid phase were investigated by using AFM, SEM, EDX, TEM, and XRD techniques. Ellipsoidally shaped 100-500 nm-sized compact grains, joined into highly ordered prismatic agglomerates, are observed. Two types of grains are observed: more regular ones consisting of spherical, amorphous particles of a few nanometers in size, and irregular ones made of partially crystalline 10-80 nm-sized particles. Consequently, the most dominant structure is 250-nm grains. The particles tend to join tightly across their crystalline domains, which appears responsible for the formation of prismatic shapes of several micrometers. This arraying causes high capacitive activity - specific capacitances of up to 800 Fg(-1) are registered, which negligibly depend on the charging/discharging rate. The synthesized material is of highly accessible internal structure, and is an excellent candidate for both low- and high-power applications.",
publisher = "Wiley-V C H Verlag Gmbh, Weinheim",
journal = "Chemelectrochem",
title = "High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis",
volume = "4",
number = "10",
pages = "2535-2541",
doi = "10.1002/celc.201700609"
}

Šekularac, G., Košević, M., Dekanski, A., Đokić, V., Panjan, M.,& Panić, V.. (2017). High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis. in Chemelectrochem
Wiley-V C H Verlag Gmbh, Weinheim., 4(10), 2535-2541.
https://doi.org/10.1002/celc.201700609

Šekularac G, Košević M, Dekanski A, Đokić V, Panjan M, Panić V. High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis. in Chemelectrochem. 2017;4(10):2535-2541.
doi:10.1002/celc.201700609 .

Šekularac, Gavrilo, Košević, Milica, Dekanski, Aleksandar, Đokić, Veljko, Panjan, Matjaz, Panić, Vladimir, "High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis" in Chemelectrochem, 4, no. 10 (2017):2535-2541,
https://doi.org/10.1002/celc.201700609 . .

TY  - JOUR
AU  - Košević, Milica
AU  - Šekularac, Gavrilo
AU  - Živković, Ljiljana S.
AU  - Panić, Vladimir
AU  - Nikolic, Branislav
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2125
AB  - TiO2 powder was synthesized by a forced hydrolysis process and used for the synthesis of Pt/TiO2 composite that is to be foreseen as an advanced electrode material. Pt was incorporated into the synthesized TiO2 from a Pt colloidal dispersion as a precursor prepared by a microwave- assisted polyol process. Physicochemical properties of TiO2 and TiO2- supported Pt were investigated by scanning electron microscopy, dynamic light scattering and X- ray spectroscopy and diffraction techniques. The properties of Pt/TiO2 composite are correlated to the basic voltammetric response of its thin-layer form. It was found that subsequent thermal treatment of synthesized TiO2, which caused crystallization into mainly rutile phase, is required for appropriate Pt incorporation. Although being appropriately loaded by Pt, and the voltammetric response is typical for Pt-based material, the voltammetry of Pt/TiO2 corresponded to much lower loadings.The possibility for Pt particles to be trapped inside TiO2 agglomerates is indicated. The catalyst usage from the synthesized Pt/TiO2 was found quite moderate due to this trapping.
PB  - Croatian Chemical Society
T2  - Croatica Chemica Acta
T1  - TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications
VL  - 90
IS  - 2
SP  - 251
EP  - 258
DO  - 10.5562/cca3175
ER  - 

@article{
author = "Košević, Milica and Šekularac, Gavrilo and Živković, Ljiljana S. and Panić, Vladimir and Nikolic, Branislav",
year = "2017",
abstract = "TiO2 powder was synthesized by a forced hydrolysis process and used for the synthesis of Pt/TiO2 composite that is to be foreseen as an advanced electrode material. Pt was incorporated into the synthesized TiO2 from a Pt colloidal dispersion as a precursor prepared by a microwave- assisted polyol process. Physicochemical properties of TiO2 and TiO2- supported Pt were investigated by scanning electron microscopy, dynamic light scattering and X- ray spectroscopy and diffraction techniques. The properties of Pt/TiO2 composite are correlated to the basic voltammetric response of its thin-layer form. It was found that subsequent thermal treatment of synthesized TiO2, which caused crystallization into mainly rutile phase, is required for appropriate Pt incorporation. Although being appropriately loaded by Pt, and the voltammetric response is typical for Pt-based material, the voltammetry of Pt/TiO2 corresponded to much lower loadings.The possibility for Pt particles to be trapped inside TiO2 agglomerates is indicated. The catalyst usage from the synthesized Pt/TiO2 was found quite moderate due to this trapping.",
publisher = "Croatian Chemical Society",
journal = "Croatica Chemica Acta",
title = "TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications",
volume = "90",
number = "2",
pages = "251-258",
doi = "10.5562/cca3175"
}

Košević, M., Šekularac, G., Živković, L. S., Panić, V.,& Nikolic, B.. (2017). TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications. in Croatica Chemica Acta
Croatian Chemical Society., 90(2), 251-258.
https://doi.org/10.5562/cca3175

Košević M, Šekularac G, Živković LS, Panić V, Nikolic B. TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications. in Croatica Chemica Acta. 2017;90(2):251-258.
doi:10.5562/cca3175 .

Košević, Milica, Šekularac, Gavrilo, Živković, Ljiljana S., Panić, Vladimir, Nikolic, Branislav, "TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications" in Croatica Chemica Acta, 90, no. 2 (2017):251-258,
https://doi.org/10.5562/cca3175 . .

TY  - JOUR
AU  - Košević, Milica
AU  - Stopić, Srećko
AU  - Bulan, Andreas
AU  - Kintrup, Juergen
AU  - Weber, Reiner
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2177
AB  - Synthesis and subsequent deposition of sub-micron spherical RuO2/TiO2 particles onto titanium were performed by continuous process in two connected reactors, exclusively applied for this purpose. Synthesis of particles was achieved by ultrasonic spray pyrolysis method in the first reactor. The deposition of thus produced RuO2/TiO2 onto an expanded titanium substrate was performed at 500 degrees C afterwards in the second, specially constructed, reactor equipped by high-voltage electrostatic field. Basic electrochemical properties of the obtained RuO2/TiO2 particles were checked in a form of the coating on Ti deposited from the suspension of the material produced in the first reactor. Thus prepared anode was investigated by cyclic voltammetry (CV), polarization measurements in O-2 (OER) and Cl-2 (CER) evolution and the accelerated stability test in diluted chloride solution. The morphology and composition of the deposited RuO2/TiO2 were checked by scanning electron microscopy/energy dispersive X-ray spectroscopy analysis. Analysis of the results obtained for OER and CER showed that Tafel slopes for these reactions were in accordance with the values for this kind of material. The CV response was of usual characteristics too. The accelerated stability test revealed acceptable anode stability.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - A continuous process for the ultrasonic spray pyrolysis synthesis of RuO2/TiO2 particles and their application as a coating of activated titanium anode
VL  - 28
IS  - 1
SP  - 43
EP  - 49
DO  - 10.1016/j.apt.2016.07.015
ER  - 

@article{
author = "Košević, Milica and Stopić, Srećko and Bulan, Andreas and Kintrup, Juergen and Weber, Reiner and Stevanović, Jasmina and Panić, Vladimir and Friedrich, Bernd",
year = "2017",
abstract = "Synthesis and subsequent deposition of sub-micron spherical RuO2/TiO2 particles onto titanium were performed by continuous process in two connected reactors, exclusively applied for this purpose. Synthesis of particles was achieved by ultrasonic spray pyrolysis method in the first reactor. The deposition of thus produced RuO2/TiO2 onto an expanded titanium substrate was performed at 500 degrees C afterwards in the second, specially constructed, reactor equipped by high-voltage electrostatic field. Basic electrochemical properties of the obtained RuO2/TiO2 particles were checked in a form of the coating on Ti deposited from the suspension of the material produced in the first reactor. Thus prepared anode was investigated by cyclic voltammetry (CV), polarization measurements in O-2 (OER) and Cl-2 (CER) evolution and the accelerated stability test in diluted chloride solution. The morphology and composition of the deposited RuO2/TiO2 were checked by scanning electron microscopy/energy dispersive X-ray spectroscopy analysis. Analysis of the results obtained for OER and CER showed that Tafel slopes for these reactions were in accordance with the values for this kind of material. The CV response was of usual characteristics too. The accelerated stability test revealed acceptable anode stability.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "A continuous process for the ultrasonic spray pyrolysis synthesis of RuO2/TiO2 particles and their application as a coating of activated titanium anode",
volume = "28",
number = "1",
pages = "43-49",
doi = "10.1016/j.apt.2016.07.015"
}

Košević, M., Stopić, S., Bulan, A., Kintrup, J., Weber, R., Stevanović, J., Panić, V.,& Friedrich, B.. (2017). A continuous process for the ultrasonic spray pyrolysis synthesis of RuO2/TiO2 particles and their application as a coating of activated titanium anode. in Advanced Powder Technology
Elsevier., 28(1), 43-49.
https://doi.org/10.1016/j.apt.2016.07.015

Košević M, Stopić S, Bulan A, Kintrup J, Weber R, Stevanović J, Panić V, Friedrich B. A continuous process for the ultrasonic spray pyrolysis synthesis of RuO2/TiO2 particles and their application as a coating of activated titanium anode. in Advanced Powder Technology. 2017;28(1):43-49.
doi:10.1016/j.apt.2016.07.015 .

Košević, Milica, Stopić, Srećko, Bulan, Andreas, Kintrup, Juergen, Weber, Reiner, Stevanović, Jasmina, Panić, Vladimir, Friedrich, Bernd, "A continuous process for the ultrasonic spray pyrolysis synthesis of RuO2/TiO2 particles and their application as a coating of activated titanium anode" in Advanced Powder Technology, 28, no. 1 (2017):43-49,
https://doi.org/10.1016/j.apt.2016.07.015 . .

TY  - JOUR
AU  - Sacer, Denis
AU  - Kralj, Magdalena
AU  - Sopcic, Suzana
AU  - Košević, Milica
AU  - Dekanski, Aleksandar
AU  - Rokovic, Marijana Kraljic
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2250
AB  - Composites of graphene and SnO2 were successfully prepared by a single step simultaneous synthesis of SnO2 and reduction of graphene oxide (GO). Three different compositions of precursor solution resulted in different composite materials containing graphene and SnO2. The reaction was realized by microwave-assisted hydrothermal synthesis. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) gave insight into the morphology and composition of the obtained materials. Good capacitive/pseudocapacitive properties of the obtained material suitable for supercapacitor application were registered by cyclic voltammetry, from where specific capacitance values up to 93 F g(-1) were determined.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Supercapacitors based on graphene/pseudocapacitive materials
VL  - 82
IS  - 4
SP  - 411
EP  - 416
DO  - 10.2298/JSC170207027S
ER  - 

@article{
author = "Sacer, Denis and Kralj, Magdalena and Sopcic, Suzana and Košević, Milica and Dekanski, Aleksandar and Rokovic, Marijana Kraljic",
year = "2017",
abstract = "Composites of graphene and SnO2 were successfully prepared by a single step simultaneous synthesis of SnO2 and reduction of graphene oxide (GO). Three different compositions of precursor solution resulted in different composite materials containing graphene and SnO2. The reaction was realized by microwave-assisted hydrothermal synthesis. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) gave insight into the morphology and composition of the obtained materials. Good capacitive/pseudocapacitive properties of the obtained material suitable for supercapacitor application were registered by cyclic voltammetry, from where specific capacitance values up to 93 F g(-1) were determined.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Supercapacitors based on graphene/pseudocapacitive materials",
volume = "82",
number = "4",
pages = "411-416",
doi = "10.2298/JSC170207027S"
}

Sacer, D., Kralj, M., Sopcic, S., Košević, M., Dekanski, A.,& Rokovic, M. K.. (2017). Supercapacitors based on graphene/pseudocapacitive materials. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 82(4), 411-416.
https://doi.org/10.2298/JSC170207027S

Sacer D, Kralj M, Sopcic S, Košević M, Dekanski A, Rokovic MK. Supercapacitors based on graphene/pseudocapacitive materials. in Journal of the Serbian Chemical Society. 2017;82(4):411-416.
doi:10.2298/JSC170207027S .

Sacer, Denis, Kralj, Magdalena, Sopcic, Suzana, Košević, Milica, Dekanski, Aleksandar, Rokovic, Marijana Kraljic, "Supercapacitors based on graphene/pseudocapacitive materials" in Journal of the Serbian Chemical Society, 82, no. 4 (2017):411-416,
https://doi.org/10.2298/JSC170207027S . .

TY  - JOUR
AU  - Košević, Milica
AU  - Panić, Vladimir
AU  - Bajat, Jelena
AU  - Mišković-Stanković, Vesna
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1871
AB  - Electrochemical impedance characteristics of bare Al and Al with CeO2 coating prepared sol-gel procedure from the ceria sol are investigated. The corrosion behavior is monitored during the exposure to 3 wt. % NaCl aqueous solution. Experimental data are fitted to various equivalent electrical circuits with special attention to inductive features. Equivalent electrical circuits involving inductivity represent impedance response equally well as the ones without inductivity, although the parameter values gained from the former correspond better to the proposed model of physicochemical changes during corrosion of investigated samples.
AB  - Korozione karakteristike aluminijuma i aluminijuma na koji je naneta prevlaka oksida cerijuma sol-gel postupkom ispitivane su primenom spektroskopije elektrohemijske impedancije tokom izlaganja u vodenom rastvoru 3 mas. % NaCl. Dobijeni podaci analizirani su ekvivalentnim električnim kolima različite konfiguracije uz posebnu diskusiju koja se odnosi na pojavu induktivnog ponašanja. Ekvivalentna kola sa induktivnim elementom i bez njega podjednako dobro opisuju impedansne odgovore, mada vrednosti parametara kola u kojima je uključena induktivnost više odgovaraju predloženom modelu fizičko-hemijskih promena tokom procesa korozije ispitivanih sistema.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Impedance characteristics of aluminum with sol-gel ceria protective coating during the exposure to chloride corrosion agent
T1  - Impedansni odgovor aluminijuma sa zaštitnom prevlakom oksida cerijuma tokom izlaganja hloridnoj korozionoj sredini
VL  - 57
IS  - 2
SP  - 305
EP  - 313
DO  - 10.5937/ZasMat1602305k
ER  - 

@article{
author = "Košević, Milica and Panić, Vladimir and Bajat, Jelena and Mišković-Stanković, Vesna",
year = "2016",
abstract = "Electrochemical impedance characteristics of bare Al and Al with CeO2 coating prepared sol-gel procedure from the ceria sol are investigated. The corrosion behavior is monitored during the exposure to 3 wt. % NaCl aqueous solution. Experimental data are fitted to various equivalent electrical circuits with special attention to inductive features. Equivalent electrical circuits involving inductivity represent impedance response equally well as the ones without inductivity, although the parameter values gained from the former correspond better to the proposed model of physicochemical changes during corrosion of investigated samples., Korozione karakteristike aluminijuma i aluminijuma na koji je naneta prevlaka oksida cerijuma sol-gel postupkom ispitivane su primenom spektroskopije elektrohemijske impedancije tokom izlaganja u vodenom rastvoru 3 mas. % NaCl. Dobijeni podaci analizirani su ekvivalentnim električnim kolima različite konfiguracije uz posebnu diskusiju koja se odnosi na pojavu induktivnog ponašanja. Ekvivalentna kola sa induktivnim elementom i bez njega podjednako dobro opisuju impedansne odgovore, mada vrednosti parametara kola u kojima je uključena induktivnost više odgovaraju predloženom modelu fizičko-hemijskih promena tokom procesa korozije ispitivanih sistema.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Impedance characteristics of aluminum with sol-gel ceria protective coating during the exposure to chloride corrosion agent, Impedansni odgovor aluminijuma sa zaštitnom prevlakom oksida cerijuma tokom izlaganja hloridnoj korozionoj sredini",
volume = "57",
number = "2",
pages = "305-313",
doi = "10.5937/ZasMat1602305k"
}

Košević, M., Panić, V., Bajat, J.,& Mišković-Stanković, V.. (2016). Impedance characteristics of aluminum with sol-gel ceria protective coating during the exposure to chloride corrosion agent. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 57(2), 305-313.
https://doi.org/10.5937/ZasMat1602305k

Košević M, Panić V, Bajat J, Mišković-Stanković V. Impedance characteristics of aluminum with sol-gel ceria protective coating during the exposure to chloride corrosion agent. in Zaštita materijala. 2016;57(2):305-313.
doi:10.5937/ZasMat1602305k .

Košević, Milica, Panić, Vladimir, Bajat, Jelena, Mišković-Stanković, Vesna, "Impedance characteristics of aluminum with sol-gel ceria protective coating during the exposure to chloride corrosion agent" in Zaštita materijala, 57, no. 2 (2016):305-313,
https://doi.org/10.5937/ZasMat1602305k . .

TY  - JOUR
AU  - Šekularac, Gavrilo
AU  - Košević, Milica
AU  - Drvenica, Ivana
AU  - Dekanski, Aleksandar
AU  - Panić, Vladimir
AU  - Nikolic, Branislav
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1932
AB  - Ruthenium oxide coating on titanium was prepared by the sol-gel procedure from well-defined colloidal oxide dispersions synthesized by the microwave (MW)-assisted hydrothermal route under defined temperature and pressure heating conditions. The dispersions were characterized by dynamic light scattering (DLS) measurements and scanning electron microscopy (SEM). The electrochemical properties were analyzed as capacitive performances gained by cyclic voltammetry and electrochemical impedance spectroscopy and as the electrocatalytic activity for oxygen evolution from acid solution. The obtained dispersions were polydisperse and contained regular particles and agglomerates of increasing surface energy and decreasing particle size as the MW-assisted heating conditions were intensified. Owing to these features of the precursor dispersions, the obtained coatings had considerably improved capacitive performances and good electrocatalytic activity for oxygen evolution at high overpotentials.
PB  - Springer, New York
T2  - Journal of Solid State Electrochemistry
T1  - Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure
VL  - 20
IS  - 11
SP  - 3115
EP  - 3123
DO  - 10.1007/s10008-016-3343-z
ER  - 

@article{
author = "Šekularac, Gavrilo and Košević, Milica and Drvenica, Ivana and Dekanski, Aleksandar and Panić, Vladimir and Nikolic, Branislav",
year = "2016",
abstract = "Ruthenium oxide coating on titanium was prepared by the sol-gel procedure from well-defined colloidal oxide dispersions synthesized by the microwave (MW)-assisted hydrothermal route under defined temperature and pressure heating conditions. The dispersions were characterized by dynamic light scattering (DLS) measurements and scanning electron microscopy (SEM). The electrochemical properties were analyzed as capacitive performances gained by cyclic voltammetry and electrochemical impedance spectroscopy and as the electrocatalytic activity for oxygen evolution from acid solution. The obtained dispersions were polydisperse and contained regular particles and agglomerates of increasing surface energy and decreasing particle size as the MW-assisted heating conditions were intensified. Owing to these features of the precursor dispersions, the obtained coatings had considerably improved capacitive performances and good electrocatalytic activity for oxygen evolution at high overpotentials.",
publisher = "Springer, New York",
journal = "Journal of Solid State Electrochemistry",
title = "Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure",
volume = "20",
number = "11",
pages = "3115-3123",
doi = "10.1007/s10008-016-3343-z"
}

Šekularac, G., Košević, M., Drvenica, I., Dekanski, A., Panić, V.,& Nikolic, B.. (2016). Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure. in Journal of Solid State Electrochemistry
Springer, New York., 20(11), 3115-3123.
https://doi.org/10.1007/s10008-016-3343-z

Šekularac G, Košević M, Drvenica I, Dekanski A, Panić V, Nikolic B. Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure. in Journal of Solid State Electrochemistry. 2016;20(11):3115-3123.
doi:10.1007/s10008-016-3343-z .

Šekularac, Gavrilo, Košević, Milica, Drvenica, Ivana, Dekanski, Aleksandar, Panić, Vladimir, Nikolic, Branislav, "Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol-gel procedure" in Journal of Solid State Electrochemistry, 20, no. 11 (2016):3115-3123,
https://doi.org/10.1007/s10008-016-3343-z . .

TY  - JOUR
AU  - Košević, Milica
AU  - Šekularac, Gavrilo
AU  - Panić, Vladimir
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3415
AB  - Cyclic voltammetry (CV) measurements were conducted and analyzed for a preliminary estimation of the stability of composite electrocatalysts based on Pt. The changes in CV currents of platinum nanoparticles supported on TiO2 were compared to the changes of those supported on commercial carbon. TiO2 was synthesized by sol-gel method and Pt was deposited from Pt colloidal dispersion synthesized by microwave-assisted polyol process. It was found that Pt component in both Pt/TiO2 and Pt/C behaves similarly with respect to stability and activity during the cycling. The loss in activity with cycling was linear and strongly depended on sweep rate, i.e., the relative loss is higher at lower sweep rates. The steady state activities for both electrocatalysts were reached at the level of 65 % of initial activity and required more than 100 voltammetric cycles.
PB  - International Association of Physical Chemists (IAPC)
T2  - Journal of Electrochemical Science and Engineering
T1  - On the stability of platinum-composite electrocatalysts prepared with different substrate materials
VL  - 6
IS  - 1
SP  - 29
EP  - 35
DO  - 10.5599/jese.269
ER  - 

@article{
author = "Košević, Milica and Šekularac, Gavrilo and Panić, Vladimir",
year = "2016",
abstract = "Cyclic voltammetry (CV) measurements were conducted and analyzed for a preliminary estimation of the stability of composite electrocatalysts based on Pt. The changes in CV currents of platinum nanoparticles supported on TiO2 were compared to the changes of those supported on commercial carbon. TiO2 was synthesized by sol-gel method and Pt was deposited from Pt colloidal dispersion synthesized by microwave-assisted polyol process. It was found that Pt component in both Pt/TiO2 and Pt/C behaves similarly with respect to stability and activity during the cycling. The loss in activity with cycling was linear and strongly depended on sweep rate, i.e., the relative loss is higher at lower sweep rates. The steady state activities for both electrocatalysts were reached at the level of 65 % of initial activity and required more than 100 voltammetric cycles.",
publisher = "International Association of Physical Chemists (IAPC)",
journal = "Journal of Electrochemical Science and Engineering",
title = "On the stability of platinum-composite electrocatalysts prepared with different substrate materials",
volume = "6",
number = "1",
pages = "29-35",
doi = "10.5599/jese.269"
}

Košević, M., Šekularac, G.,& Panić, V.. (2016). On the stability of platinum-composite electrocatalysts prepared with different substrate materials. in Journal of Electrochemical Science and Engineering
International Association of Physical Chemists (IAPC)., 6(1), 29-35.
https://doi.org/10.5599/jese.269

Košević M, Šekularac G, Panić V. On the stability of platinum-composite electrocatalysts prepared with different substrate materials. in Journal of Electrochemical Science and Engineering. 2016;6(1):29-35.
doi:10.5599/jese.269 .

Košević, Milica, Šekularac, Gavrilo, Panić, Vladimir, "On the stability of platinum-composite electrocatalysts prepared with different substrate materials" in Journal of Electrochemical Science and Engineering, 6, no. 1 (2016):29-35,
https://doi.org/10.5599/jese.269 . .

TY  - JOUR
AU  - Pavelkić, Vesna
AU  - Brdaric, Tanja P
AU  - Petrovic, Marija P
AU  - Šekularac, Gavrilo
AU  - Košević, Milica
AU  - Pezo, Lato
AU  - Ilic, Marija A
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1679
AB  - The applicability of Peleg model was investigated for predicting mass transfer kinetics during the osmotic dehydration (OD) process of pears, at different concentrations (40, 60 and 70%, w/w) and temperatures (20, 35 and 50 degrees C) of sucrose solution. Increase in sucrose solution concentration resulted in higher water loss (WL) and solid gain (SG) values through the osmotic treatment period. After 360 min of osmotic treatment of pears, WL ranged from 23.71 to 31.68% at 20 degrees C, from 24.80 to 40.38% at 35 degrees C and from 33.30 to 52.07% at 50 degrees C of initial weight of pears. The increase of dry mass of the samples, SG, after 360 min of osmotic treatment ranged from 3.02 to 6.68% at 20 degrees C, from 4.15 to 7.71% at 35 degrees C and from 5.00 to 8.92% at 50 degrees C. Peleg's rate constants, k(1)(WL) and k(1)(SG), decreased with increasing temperature, as well as decreased with increasing concentration of osmotic solution at constant temperature. Both capacity constants k(2)(WL) and k(2)(SG) also exhibited the inverse relationship between capacity constant and temperature, as well as concentration of the osmotic solution. Peleg's rate constants for WL and SG at all temperatures followed an Arrhenius type relationship. The predicted equilibrium values were very close to experimental ones, which was confirmed with high coefficients of determination and by the residual analysis.
PB  - Association of the Chemical Engineers of Serbia
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION
VL  - 21
IS  - 4
SP  - 485
EP  - 492
DO  - 10.2298/CICEQ141014004P
ER  - 

@article{
author = "Pavelkić, Vesna and Brdaric, Tanja P and Petrovic, Marija P and Šekularac, Gavrilo and Košević, Milica and Pezo, Lato and Ilic, Marija A",
year = "2015",
abstract = "The applicability of Peleg model was investigated for predicting mass transfer kinetics during the osmotic dehydration (OD) process of pears, at different concentrations (40, 60 and 70%, w/w) and temperatures (20, 35 and 50 degrees C) of sucrose solution. Increase in sucrose solution concentration resulted in higher water loss (WL) and solid gain (SG) values through the osmotic treatment period. After 360 min of osmotic treatment of pears, WL ranged from 23.71 to 31.68% at 20 degrees C, from 24.80 to 40.38% at 35 degrees C and from 33.30 to 52.07% at 50 degrees C of initial weight of pears. The increase of dry mass of the samples, SG, after 360 min of osmotic treatment ranged from 3.02 to 6.68% at 20 degrees C, from 4.15 to 7.71% at 35 degrees C and from 5.00 to 8.92% at 50 degrees C. Peleg's rate constants, k(1)(WL) and k(1)(SG), decreased with increasing temperature, as well as decreased with increasing concentration of osmotic solution at constant temperature. Both capacity constants k(2)(WL) and k(2)(SG) also exhibited the inverse relationship between capacity constant and temperature, as well as concentration of the osmotic solution. Peleg's rate constants for WL and SG at all temperatures followed an Arrhenius type relationship. The predicted equilibrium values were very close to experimental ones, which was confirmed with high coefficients of determination and by the residual analysis.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION",
volume = "21",
number = "4",
pages = "485-492",
doi = "10.2298/CICEQ141014004P"
}

Pavelkić, V., Brdaric, T. P., Petrovic, M. P., Šekularac, G., Košević, M., Pezo, L.,& Ilic, M. A.. (2015). APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION. in Chemical Industry and Chemical Engineering Quarterly / CICEQ
Association of the Chemical Engineers of Serbia., 21(4), 485-492.
https://doi.org/10.2298/CICEQ141014004P

Pavelkić V, Brdaric TP, Petrovic MP, Šekularac G, Košević M, Pezo L, Ilic MA. APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2015;21(4):485-492.
doi:10.2298/CICEQ141014004P .

Pavelkić, Vesna, Brdaric, Tanja P, Petrovic, Marija P, Šekularac, Gavrilo, Košević, Milica, Pezo, Lato, Ilic, Marija A, "APPLICATION OF PELEG MODEL ON MASS TRANSFER KINETICS DURING OSMOTIC DEHYDRATATION OF PEAR CUBES IN SUCROSE SOLUTION" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 21, no. 4 (2015):485-492,
https://doi.org/10.2298/CICEQ141014004P . .

TY  - CONF
AU  - Šekularac, Gavrilo
AU  - Dekanski, Aleksandar
AU  - Pavelkić, Vesna
AU  - Stevanović, Sanja
AU  - Košević, Milica
AU  - Drmanić, Saša Ž.
AU  - Kostić, Ivana
AU  - Panić, Vladimir
PY  - 2015
UR  - http://www.aseee.eu/index.php/rse-see5-home
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3552
AB  - One-step simple temperature-controlled microwave synthesis was applied to prepare nanocrystalline RuO2 dispersion from aqueous RuCl3. RuO2 dispersion was subjected to dynamic light scattering in order to analyze the synthesized particles, whereas structural and morphological properties of the solid phase are investigated by AFM, SEM, EDAX and XRD techniques. The ordered unusual shape of ca. 100-nm native particles, as well as highlyordered prismatic agglomerate sheets are observed. Capacitive properties of RuO2 was investigated by cyclic 
 voltammetry and electrochemical impedance spectroscopy in 1 M H2SO4 and standard three-electrode cell, with ink-type working electrode on glassy carbon substrate A specific capacitances as high as 750 F/g were obtained, which negligibly depend on sweep rate in 5–500 mV/s range. These findings are quite unusual for this kind of material consisted of rather large particles, and makes it excellent candidate for both low and high power applications. The capacitive response appears stable during prolonged charge/discharge cycling.
PB  - Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria
C3  - 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
T1  - Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor
SP  - 93
EP  - 93
UR  - https://hdl.handle.net/21.15107/rcub_cer_3552
ER  - 

@conference{
author = "Šekularac, Gavrilo and Dekanski, Aleksandar and Pavelkić, Vesna and Stevanović, Sanja and Košević, Milica and Drmanić, Saša Ž. and Kostić, Ivana and Panić, Vladimir",
year = "2015",
abstract = "One-step simple temperature-controlled microwave synthesis was applied to prepare nanocrystalline RuO2 dispersion from aqueous RuCl3. RuO2 dispersion was subjected to dynamic light scattering in order to analyze the synthesized particles, whereas structural and morphological properties of the solid phase are investigated by AFM, SEM, EDAX and XRD techniques. The ordered unusual shape of ca. 100-nm native particles, as well as highlyordered prismatic agglomerate sheets are observed. Capacitive properties of RuO2 was investigated by cyclic 
 voltammetry and electrochemical impedance spectroscopy in 1 M H2SO4 and standard three-electrode cell, with ink-type working electrode on glassy carbon substrate A specific capacitances as high as 750 F/g were obtained, which negligibly depend on sweep rate in 5–500 mV/s range. These findings are quite unusual for this kind of material consisted of rather large particles, and makes it excellent candidate for both low and high power applications. The capacitive response appears stable during prolonged charge/discharge cycling.",
publisher = "Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria",
journal = "5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts",
title = "Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor",
pages = "93-93",
url = "https://hdl.handle.net/21.15107/rcub_cer_3552"
}

Šekularac, G., Dekanski, A., Pavelkić, V., Stevanović, S., Košević, M., Drmanić, S. Ž., Kostić, I.,& Panić, V.. (2015). Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts
Academician Evgeni Budevski Institute of Electrochemistry and Energy Systems Bulgarian Academy of Sciences, Sofia, Bulgaria., 93-93.
https://hdl.handle.net/21.15107/rcub_cer_3552

Šekularac G, Dekanski A, Pavelkić V, Stevanović S, Košević M, Drmanić SŽ, Kostić I, Panić V. Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor. in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts. 2015;:93-93.
https://hdl.handle.net/21.15107/rcub_cer_3552 .

Šekularac, Gavrilo, Dekanski, Aleksandar, Pavelkić, Vesna, Stevanović, Sanja, Košević, Milica, Drmanić, Saša Ž., Kostić, Ivana, Panić, Vladimir, "Microwave Synthesis of Unusually-Shaped Crystalline RuO2 Supercapacitor" in 5th Regional Symposium on Electrochemistry South-East Europe, RSE-SEE, Program and Book of Abstracts (2015):93-93,
https://hdl.handle.net/21.15107/rcub_cer_3552 .

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

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

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

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

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