TY  - JOUR
AU  - Košević, Milica
AU  - Šekularac, Gavrilo
AU  - Živković, Ljiljana S.
AU  - Panić, Vladimir
AU  - Nikolic, Branislav
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5858
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
EP  - 258
IS  - 2
SP  - 251
VL  - 90
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",
pages = "258-251",
number = "2",
volume = "90",
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  - Šekularac, Gavrilo
AU  - Košević, Milica
AU  - Dekanski, Aleksandar
AU  - Đokić, Veljko
AU  - Panjan, Matjaz
AU  - Panić, Vladimir
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3629
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-VCH Verlag Gmbh, Weinheim
T2  - Chemelectrochem
T1  - High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis
EP  - 2541
IS  - 10
SP  - 2535
VL  - 4
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-VCH Verlag Gmbh, Weinheim",
journal = "Chemelectrochem",
title = "High Energy/Power Supercapacitor Performances of Intrinsically Ordered Ruthenium Oxide Prepared through Fast Hydrothermal Synthesis",
pages = "2541-2535",
number = "10",
volume = "4",
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-VCH 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  - Panić, Vladimir
AU  - Bajat, Jelena
AU  - Mišković-Stanković, Vesna
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3210
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  - Engineering Society for Corrosion, Belgrade, Serbia
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
EP  - 313
IS  - 2
SP  - 305
VL  - 57
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 = "Engineering Society for Corrosion, Belgrade, Serbia",
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",
pages = "313-305",
number = "2",
volume = "57",
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
Engineering Society for Corrosion, Belgrade, Serbia., 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  - CONF
AU  - Šekularac, Gavrilo
AU  - Dekanski, Aleksandar
AU  - Pavelkić, Vesna
AU  - Stevanović, Sanja
AU  - Košević, Milica
AU  - Drmanić, Saša
AU  - Kostić, Ivana
AU  - Panić, Vladimir
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2881
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
EP  - 93
SP  - 93
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2881
ER  - 

@conference{
author = "Šekularac, Gavrilo and Dekanski, Aleksandar and Pavelkić, Vesna and Stevanović, Sanja and Košević, Milica and Drmanić, Saša 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_technorep_2881"
}

Šekularac, G., Dekanski, A., Pavelkić, V., Stevanović, S., Košević, M., Drmanić, S., 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_technorep_2881

Šekularac G, Dekanski A, Pavelkić V, Stevanović S, Košević M, Drmanić S, 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_technorep_2881 .

Šekularac, Gavrilo, Dekanski, Aleksandar, Pavelkić, Vesna, Stevanović, Sanja, Košević, Milica, Drmanić, Saša, 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_technorep_2881 .