TY  - JOUR
AU  - Obradović, Maja D.
AU  - Lačnjevac, Uroš Č.
AU  - Radmilović, Vuk V.
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Kovač, Janez
AU  - Rogan, Jelena R.
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6587
AB  - Two types of Cu-modified Pd catalysts supported on high area carbon were prepared: Pd nanoparticles modified with a sub-monolayer of underpotentially deposited Cu (Cu@Pd/C) and Pd-Cu alloy nanoparticles (Pd-Cu/C), and examined for the ethanol oxidation reaction (EOR) in alkaline solution. The catalysts were characterized by energy-dispersive X-ray spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy, as well as cyclic voltammetry. As reference catalysts, Pd/C and Pt/C were used. The electrochemically active surface area of all samples was determined from COads and Cuupd desorption and Pd oxide reduction, and used to assess their intrinsic activity for EOR. Intimate contact of Pd with Cu atoms enhanced its activity, regardless of the type of bimetal catalyst. The atomic Pd:Cu ratio between 2:1 and 4:1 appears to be optimal for high activity. The most active catalyst under the potentiodynamic conditions was Cu@Pd/C with θ(Cu) = 0.21,although Pd-Cu/C was superior during the potentiostatic test. All bimetallic catalysts surpassed Pd/C in mass activity. The EOR activity of Pt/C was higher compared to Pd-based catalysts at low potentials, both in terms of specific and mass activity, but with a significant decline over a 30-min potentiostatic stability test.
PB  - Elsevier B.V.
T2  - Journal of Electroanalytical Chemistry
T1  - Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium
SP  - 117673
VL  - 944
DO  - 10.1016/j.jelechem.2023.117673
ER  - 

@article{
author = "Obradović, Maja D. and Lačnjevac, Uroš Č. and Radmilović, Vuk V. and Gavrilović-Wohlmuther, Aleksandra and Kovač, Janez and Rogan, Jelena R. and Radmilović, Velimir R. and Gojković, Snežana Lj.",
year = "2023",
abstract = "Two types of Cu-modified Pd catalysts supported on high area carbon were prepared: Pd nanoparticles modified with a sub-monolayer of underpotentially deposited Cu (Cu@Pd/C) and Pd-Cu alloy nanoparticles (Pd-Cu/C), and examined for the ethanol oxidation reaction (EOR) in alkaline solution. The catalysts were characterized by energy-dispersive X-ray spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy, as well as cyclic voltammetry. As reference catalysts, Pd/C and Pt/C were used. The electrochemically active surface area of all samples was determined from COads and Cuupd desorption and Pd oxide reduction, and used to assess their intrinsic activity for EOR. Intimate contact of Pd with Cu atoms enhanced its activity, regardless of the type of bimetal catalyst. The atomic Pd:Cu ratio between 2:1 and 4:1 appears to be optimal for high activity. The most active catalyst under the potentiodynamic conditions was Cu@Pd/C with θ(Cu) = 0.21,although Pd-Cu/C was superior during the potentiostatic test. All bimetallic catalysts surpassed Pd/C in mass activity. The EOR activity of Pt/C was higher compared to Pd-based catalysts at low potentials, both in terms of specific and mass activity, but with a significant decline over a 30-min potentiostatic stability test.",
publisher = "Elsevier B.V.",
journal = "Journal of Electroanalytical Chemistry",
title = "Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium",
pages = "117673",
volume = "944",
doi = "10.1016/j.jelechem.2023.117673"
}

Obradović, M. D., Lačnjevac, U. Č., Radmilović, V. V., Gavrilović-Wohlmuther, A., Kovač, J., Rogan, J. R., Radmilović, V. R.,& Gojković, S. Lj.. (2023). Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium. in Journal of Electroanalytical Chemistry
Elsevier B.V.., 944, 117673.
https://doi.org/10.1016/j.jelechem.2023.117673

Obradović MD, Lačnjevac UČ, Radmilović VV, Gavrilović-Wohlmuther A, Kovač J, Rogan JR, Radmilović VR, Gojković SL. Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium. in Journal of Electroanalytical Chemistry. 2023;944:117673.
doi:10.1016/j.jelechem.2023.117673 .

Obradović, Maja D., Lačnjevac, Uroš Č., Radmilović, Vuk V., Gavrilović-Wohlmuther, Aleksandra, Kovač, Janez, Rogan, Jelena R., Radmilović, Velimir R., Gojković, Snežana Lj., "Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium" in Journal of Electroanalytical Chemistry, 944 (2023):117673,
https://doi.org/10.1016/j.jelechem.2023.117673 . .

TY  - JOUR
AU  - Lović, Jelena D.
AU  - Nikolić, Nebojša D.
AU  - Živković, Predrag M.
AU  - Dimitrijević, Silvana B.
AU  - Stevanović, Maja
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6608
AB  - A series of bimetallic Sn-Pd catalysts were prepared by a template-free two step electrodeposition method. According to this method, Sn was electrodeposited firstly in potentiostatic or galvanostatic regime on Cu electrodes in the form of dendrites, then Pd was galvanostatically electrodeposited in the second step on the electrode with the electrodeposited Sn dendrites. The produced Sn-Pd electrocatalysts were compared with an electrocatalyst obtained by Pd electrodeposition on a bare Cu electrode. The morphological and elemental analysis of Sn-Pd and Pd electrocatalysts was performed by means of scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) techniques. The dendrites of various shapes and degree of branching were obtained by Sn deposition depending on electrodeposition regime, while Pd was electrodeposited in a form of compact Pd islands on both Sn dendrites and the Cu electrode. Cyclic voltammetry (CV) was applied for the electrochemical examination of Sn-Pd and Pd catalysts towards the ethanol oxidation reaction (EOR) in the alkaline solution. The electrocatalyst Sn0.6-Pd0.4 with an atomic ratio of 60 at.% Sn-40 at.% Pd showed higher oxidation efficiency and better tolerance towards intermediate species in EOR than the other examined electrocatalysts. It was shown that the lower fraction of Pd, relative to Sn, was crucial to achieving optimal synergy of Sn with Pd thus contributing to enhanced electrochemical behavior regarding EOR.
AB  - Серија на биметални катализатори со различни односи на Sn:Pd беа подготвени со методотна двостепена електродепозиција без користење шаблонски протокол. Според овој метод, прво Sn во форма на дендрити беше нанесен електрохемиски во потенциостатски или галваностатски режим врз површината на Cu-електроди. Потоа, во вториот чекор, Pd беше галваностатски нанесен на електродата врз нанесените дендрити од Sn. Вака добиените Sn:Pd-електрокатализатори беа споредени со електрокатализатори добиени со нанесување на Pd на чиста Cu електрода. Морфолошката и елементарната анализа на Sn:Pd и Pd-електрокатализаторите беше направена со помош на скенирачка електронска микроскопија (SEM) и со примена на рендгенска спектроскопија со енергетска дисперзија (EDS). Дендритите со различни форми и различен степен на разгранување беа добиени со нанесување Sn во зависност од режимот на електродепозиција, додека Pd беше нанесен во форма на компактни острови врз дендритите од Pd и Sn на површината на Cu-електродата. Цикличната волтаметрија (CV) беше применета за електрохемиското испитување на Sn:Pd и Pd-катализаторите во од аспект на оксидацијата на етанолот во алкална средина. Eлектрокатализаторот Sn0.6-Pd0,4 со атомски однос од 60 % Sn и 40 % Pd покажа поголема ефикасност на оксидација и поголема толеранција во однос на интермедијарните супстрати отколку другите испитани електрокатализатори. Се покажа дека помал удел на Pd во однос на Sn е еден од клучните фактори за обезбедување оптимална синергија на Sn со Pd, при што на овој начин беше забележана зголемена електрохемиска активност односно оксидацијата на етанолот.
PB  - Society of Chemists and Technologists of Macedonia
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - INFLUENCE OF ELECTRODEPOSITION REGIME AND Sn:Pd RATIOS IN Sn-Pd ELECTROCATALYSTS ON ETHANOL OXIDATION REACTION
T1  - ВЛИЈАНИЕ НА РЕЖИМОТ НА ЕЛЕКТРОДЕПОЗИЦИЈАТА И НА ОДНОСИТЕ НА Sn:Pd ВО Sn-Pd-ЕЛЕКТРОКАТАЛИЗАТОРИТЕ ВРЗ ОКСИДАЦИЈАТА НА ЕТАНОЛОТ
EP  - 102
IS  - 1
SP  - 93
VL  - 42
DO  - 10.20450/mjcce.2023.2702
ER  - 

@article{
author = "Lović, Jelena D. and Nikolić, Nebojša D. and Živković, Predrag M. and Dimitrijević, Silvana B. and Stevanović, Maja",
year = "2023",
abstract = "A series of bimetallic Sn-Pd catalysts were prepared by a template-free two step electrodeposition method. According to this method, Sn was electrodeposited firstly in potentiostatic or galvanostatic regime on Cu electrodes in the form of dendrites, then Pd was galvanostatically electrodeposited in the second step on the electrode with the electrodeposited Sn dendrites. The produced Sn-Pd electrocatalysts were compared with an electrocatalyst obtained by Pd electrodeposition on a bare Cu electrode. The morphological and elemental analysis of Sn-Pd and Pd electrocatalysts was performed by means of scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) techniques. The dendrites of various shapes and degree of branching were obtained by Sn deposition depending on electrodeposition regime, while Pd was electrodeposited in a form of compact Pd islands on both Sn dendrites and the Cu electrode. Cyclic voltammetry (CV) was applied for the electrochemical examination of Sn-Pd and Pd catalysts towards the ethanol oxidation reaction (EOR) in the alkaline solution. The electrocatalyst Sn0.6-Pd0.4 with an atomic ratio of 60 at.% Sn-40 at.% Pd showed higher oxidation efficiency and better tolerance towards intermediate species in EOR than the other examined electrocatalysts. It was shown that the lower fraction of Pd, relative to Sn, was crucial to achieving optimal synergy of Sn with Pd thus contributing to enhanced electrochemical behavior regarding EOR., Серија на биметални катализатори со различни односи на Sn:Pd беа подготвени со методотна двостепена електродепозиција без користење шаблонски протокол. Според овој метод, прво Sn во форма на дендрити беше нанесен електрохемиски во потенциостатски или галваностатски режим врз површината на Cu-електроди. Потоа, во вториот чекор, Pd беше галваностатски нанесен на електродата врз нанесените дендрити од Sn. Вака добиените Sn:Pd-електрокатализатори беа споредени со електрокатализатори добиени со нанесување на Pd на чиста Cu електрода. Морфолошката и елементарната анализа на Sn:Pd и Pd-електрокатализаторите беше направена со помош на скенирачка електронска микроскопија (SEM) и со примена на рендгенска спектроскопија со енергетска дисперзија (EDS). Дендритите со различни форми и различен степен на разгранување беа добиени со нанесување Sn во зависност од режимот на електродепозиција, додека Pd беше нанесен во форма на компактни острови врз дендритите од Pd и Sn на површината на Cu-електродата. Цикличната волтаметрија (CV) беше применета за електрохемиското испитување на Sn:Pd и Pd-катализаторите во од аспект на оксидацијата на етанолот во алкална средина. Eлектрокатализаторот Sn0.6-Pd0,4 со атомски однос од 60 % Sn и 40 % Pd покажа поголема ефикасност на оксидација и поголема толеранција во однос на интермедијарните супстрати отколку другите испитани електрокатализатори. Се покажа дека помал удел на Pd во однос на Sn е еден од клучните фактори за обезбедување оптимална синергија на Sn со Pd, при што на овој начин беше забележана зголемена електрохемиска активност односно оксидацијата на етанолот.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "INFLUENCE OF ELECTRODEPOSITION REGIME AND Sn:Pd RATIOS IN Sn-Pd ELECTROCATALYSTS ON ETHANOL OXIDATION REACTION, ВЛИЈАНИЕ НА РЕЖИМОТ НА ЕЛЕКТРОДЕПОЗИЦИЈАТА И НА ОДНОСИТЕ НА Sn:Pd ВО Sn-Pd-ЕЛЕКТРОКАТАЛИЗАТОРИТЕ ВРЗ ОКСИДАЦИЈАТА НА ЕТАНОЛОТ",
pages = "102-93",
number = "1",
volume = "42",
doi = "10.20450/mjcce.2023.2702"
}

Lović, J. D., Nikolić, N. D., Živković, P. M., Dimitrijević, S. B.,& Stevanović, M.. (2023). INFLUENCE OF ELECTRODEPOSITION REGIME AND Sn:Pd RATIOS IN Sn-Pd ELECTROCATALYSTS ON ETHANOL OXIDATION REACTION. in Macedonian Journal of Chemistry and Chemical Engineering
Society of Chemists and Technologists of Macedonia., 42(1), 93-102.
https://doi.org/10.20450/mjcce.2023.2702

Lović JD, Nikolić ND, Živković PM, Dimitrijević SB, Stevanović M. INFLUENCE OF ELECTRODEPOSITION REGIME AND Sn:Pd RATIOS IN Sn-Pd ELECTROCATALYSTS ON ETHANOL OXIDATION REACTION. in Macedonian Journal of Chemistry and Chemical Engineering. 2023;42(1):93-102.
doi:10.20450/mjcce.2023.2702 .

Lović, Jelena D., Nikolić, Nebojša D., Živković, Predrag M., Dimitrijević, Silvana B., Stevanović, Maja, "INFLUENCE OF ELECTRODEPOSITION REGIME AND Sn:Pd RATIOS IN Sn-Pd ELECTROCATALYSTS ON ETHANOL OXIDATION REACTION" in Macedonian Journal of Chemistry and Chemical Engineering, 42, no. 1 (2023):93-102,
https://doi.org/10.20450/mjcce.2023.2702 . .

TY  - JOUR
AU  - Nikolić, Nebojša D.
AU  - Lović, Jelena
AU  - Maksimović, Vesna
AU  - Živković, Predrag M.
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5202
AB  - The formation of tin dendritic nanostructures by electrolysis from the alkaline electrolytehas been investigated. Morphology and structure of Sn dendrites produced applying both potentiostatic and galvanostatic regimes of the electrolysis are characterized by SEM and XRD, respectively. Depending on the applied cathodic potentials, three types of Sn dendrites were obtained: (a) needle like and spear-like, (b) fern-like, and (c) stem-like dendrites. The very branchy dendrites with branches of the prismatic shape obtained by the galvanostatic regime of electrolysis represented anovel type of Sn dendrites, not previously reported in the literature. To explain the formation ofvarious dendritic forms, correlation with the polarization characteristics for this electrodepositionsystem is considered. The needle-like and the spear-like dendrites represented monocrystals of(200),(400) preferred orientation, the fern-like dendrites exhibited the predominant (220),(440) preferredorientation, while in the stem-like particles Sn crystallites were oriented to a greater extent inthe (440) crystal plane than in other planes. The galvanostatically synthesized Sn particles possessed the strong (200),(400) preferred orientation. The strong influence of parameters and regimes ofelectrodeposition on structural characteristics of Sn dendrites is explained by the fundamental lawsof electrocrystallization taking into consideration the concept of slow-growing and fast-growingcrystal planes.
PB  - MDPI
T2  - Metals
T1  - Morphology and Structure of Electrolytically Synthesized Tin Dendritic Nanostructures
IS  - 7
SP  - 1201
VL  - 12
DO  - 10.3390/met12071201
ER  - 

@article{
author = "Nikolić, Nebojša D. and Lović, Jelena and Maksimović, Vesna and Živković, Predrag M.",
year = "2022",
abstract = "The formation of tin dendritic nanostructures by electrolysis from the alkaline electrolytehas been investigated. Morphology and structure of Sn dendrites produced applying both potentiostatic and galvanostatic regimes of the electrolysis are characterized by SEM and XRD, respectively. Depending on the applied cathodic potentials, three types of Sn dendrites were obtained: (a) needle like and spear-like, (b) fern-like, and (c) stem-like dendrites. The very branchy dendrites with branches of the prismatic shape obtained by the galvanostatic regime of electrolysis represented anovel type of Sn dendrites, not previously reported in the literature. To explain the formation ofvarious dendritic forms, correlation with the polarization characteristics for this electrodepositionsystem is considered. The needle-like and the spear-like dendrites represented monocrystals of(200),(400) preferred orientation, the fern-like dendrites exhibited the predominant (220),(440) preferredorientation, while in the stem-like particles Sn crystallites were oriented to a greater extent inthe (440) crystal plane than in other planes. The galvanostatically synthesized Sn particles possessed the strong (200),(400) preferred orientation. The strong influence of parameters and regimes ofelectrodeposition on structural characteristics of Sn dendrites is explained by the fundamental lawsof electrocrystallization taking into consideration the concept of slow-growing and fast-growingcrystal planes.",
publisher = "MDPI",
journal = "Metals",
title = "Morphology and Structure of Electrolytically Synthesized Tin Dendritic Nanostructures",
number = "7",
pages = "1201",
volume = "12",
doi = "10.3390/met12071201"
}

Nikolić, N. D., Lović, J., Maksimović, V.,& Živković, P. M.. (2022). Morphology and Structure of Electrolytically Synthesized Tin Dendritic Nanostructures. in Metals
MDPI., 12(7), 1201.
https://doi.org/10.3390/met12071201

Nikolić ND, Lović J, Maksimović V, Živković PM. Morphology and Structure of Electrolytically Synthesized Tin Dendritic Nanostructures. in Metals. 2022;12(7):1201.
doi:10.3390/met12071201 .

Nikolić, Nebojša D., Lović, Jelena, Maksimović, Vesna, Živković, Predrag M., "Morphology and Structure of Electrolytically Synthesized Tin Dendritic Nanostructures" in Metals, 12, no. 7 (2022):1201,
https://doi.org/10.3390/met12071201 . .