TY  - JOUR
AU  - Stevanović, Sanja
AU  - Tripković, Dušan
AU  - Rogan, Jelena
AU  - Minić, Dragica M.
AU  - Gavrilović, Aleksandra
AU  - Tripković, Amalija
AU  - Jovanović, Vladislava M.
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1899
AB  - High surface area carbon supported Pt and Pt3Sn catalysts were synthesized by microwave irradiation and investigated in the ethanol electro-oxidation reaction. The catalysts were obtained using a modified polyol method in an ethylene glycol solution and were characterized in terms of structure, morphology and composition by employing XRD, STM and EDX techniques. The diffraction peaks of Pt3Sn/C catalyst in XRD patterns are shifted to lower 2 theta values with respect to the corresponding peaks at Pt/C catalyst as a consequence of alloy formation between Pt and Sn. Particle size analysis from STM and XRD shows that Pt and Pt3Sn clusters are of a small diameter (similar to 2 nm) with a narrow size distribution. Pt3Sn/C catalyst is highly active in ethanol oxidation with the onset potential shifted for similar to 150 mV to more negative values and with similar to 2 times higher currents in comparison to Pt/C.
PB  - Maik Nauka/Interperiodica/Springer, New York
T2  - Russian Journal of Physical Chemistry A
T1  - Enhanced activity in ethanol oxidation of Pt3Sn electrocatalysts synthesized by microwave irradiation
EP  - 2304
IS  - 13
SP  - 2299
VL  - 85
DO  - 10.1134/S0036024411130309
ER  - 

@article{
author = "Stevanović, Sanja and Tripković, Dušan and Rogan, Jelena and Minić, Dragica M. and Gavrilović, Aleksandra and Tripković, Amalija and Jovanović, Vladislava M.",
year = "2011",
abstract = "High surface area carbon supported Pt and Pt3Sn catalysts were synthesized by microwave irradiation and investigated in the ethanol electro-oxidation reaction. The catalysts were obtained using a modified polyol method in an ethylene glycol solution and were characterized in terms of structure, morphology and composition by employing XRD, STM and EDX techniques. The diffraction peaks of Pt3Sn/C catalyst in XRD patterns are shifted to lower 2 theta values with respect to the corresponding peaks at Pt/C catalyst as a consequence of alloy formation between Pt and Sn. Particle size analysis from STM and XRD shows that Pt and Pt3Sn clusters are of a small diameter (similar to 2 nm) with a narrow size distribution. Pt3Sn/C catalyst is highly active in ethanol oxidation with the onset potential shifted for similar to 150 mV to more negative values and with similar to 2 times higher currents in comparison to Pt/C.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "Russian Journal of Physical Chemistry A",
title = "Enhanced activity in ethanol oxidation of Pt3Sn electrocatalysts synthesized by microwave irradiation",
pages = "2304-2299",
number = "13",
volume = "85",
doi = "10.1134/S0036024411130309"
}

Stevanović, S., Tripković, D., Rogan, J., Minić, D. M., Gavrilović, A., Tripković, A.,& Jovanović, V. M.. (2011). Enhanced activity in ethanol oxidation of Pt3Sn electrocatalysts synthesized by microwave irradiation. in Russian Journal of Physical Chemistry A
Maik Nauka/Interperiodica/Springer, New York., 85(13), 2299-2304.
https://doi.org/10.1134/S0036024411130309

Stevanović S, Tripković D, Rogan J, Minić DM, Gavrilović A, Tripković A, Jovanović VM. Enhanced activity in ethanol oxidation of Pt3Sn electrocatalysts synthesized by microwave irradiation. in Russian Journal of Physical Chemistry A. 2011;85(13):2299-2304.
doi:10.1134/S0036024411130309 .

Stevanović, Sanja, Tripković, Dušan, Rogan, Jelena, Minić, Dragica M., Gavrilović, Aleksandra, Tripković, Amalija, Jovanović, Vladislava M., "Enhanced activity in ethanol oxidation of Pt3Sn electrocatalysts synthesized by microwave irradiation" in Russian Journal of Physical Chemistry A, 85, no. 13 (2011):2299-2304,
https://doi.org/10.1134/S0036024411130309 . .

TY  - JOUR
AU  - Obradović, Maja
AU  - Tripković, Amalija
AU  - Gojković, Snežana Lj.
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1417
AB  - We have investigated the oxidation of HCOOH on Au-modified Pt (Au"Pt) and Pt-modified Au (Pt")/Au) electrodes to establish the role of the ensemble and the electronic effect in the catalysis of this reaction. The surfaces were modified by the electrodeposition of sub-monolayers. Cyclic voltammetry in the supporting electrolyte and COads stripping have shown that the electronic Pt-Au interactions are insignificant on Au"Pt. but considerable on Pt"Au. oxidation of COads on Au"Pt commenced at the same potentials as on bare Pt, whereas on Pt"Au the oxidation was delayed for similar to 0.2 V. Both types of Pt-Au surfaces were found to be more active toward the oxidation of HCOOH compared to bare Pt, exhibiting the maximum activity at Pt fraction between 0.15 and 0.25 with the enhancement factor of more than two orders of magnitude. On bimetallic surfaces the amount of COads formed by HCOOH dehydration was low and decreased with decreasing Pt fraction. it was concluded that the high activity of Pt-Au surfaces is caused by the increased selectivity toward the HCOOH dehydrogenation. Similar behavior of Pt-Au surfaces in the HCOOH oxidation, regardless on the Pt-Au electronic interactions, leads to the conclusion that the ensemble effect plays dominant role in the catalysis of HCOOH oxidation.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - The origin of high activity of Pt-Au surfaces in the formic acid oxidation
EP  - 209
IS  - 1
SP  - 204
VL  - 55
DO  - 10.1016/j.electacta.2009.08.038
ER  - 

@article{
author = "Obradović, Maja and Tripković, Amalija and Gojković, Snežana Lj.",
year = "2009",
abstract = "We have investigated the oxidation of HCOOH on Au-modified Pt (Au"Pt) and Pt-modified Au (Pt")/Au) electrodes to establish the role of the ensemble and the electronic effect in the catalysis of this reaction. The surfaces were modified by the electrodeposition of sub-monolayers. Cyclic voltammetry in the supporting electrolyte and COads stripping have shown that the electronic Pt-Au interactions are insignificant on Au"Pt. but considerable on Pt"Au. oxidation of COads on Au"Pt commenced at the same potentials as on bare Pt, whereas on Pt"Au the oxidation was delayed for similar to 0.2 V. Both types of Pt-Au surfaces were found to be more active toward the oxidation of HCOOH compared to bare Pt, exhibiting the maximum activity at Pt fraction between 0.15 and 0.25 with the enhancement factor of more than two orders of magnitude. On bimetallic surfaces the amount of COads formed by HCOOH dehydration was low and decreased with decreasing Pt fraction. it was concluded that the high activity of Pt-Au surfaces is caused by the increased selectivity toward the HCOOH dehydrogenation. Similar behavior of Pt-Au surfaces in the HCOOH oxidation, regardless on the Pt-Au electronic interactions, leads to the conclusion that the ensemble effect plays dominant role in the catalysis of HCOOH oxidation.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "The origin of high activity of Pt-Au surfaces in the formic acid oxidation",
pages = "209-204",
number = "1",
volume = "55",
doi = "10.1016/j.electacta.2009.08.038"
}

Obradović, M., Tripković, A.,& Gojković, S. Lj.. (2009). The origin of high activity of Pt-Au surfaces in the formic acid oxidation. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 55(1), 204-209.
https://doi.org/10.1016/j.electacta.2009.08.038

Obradović M, Tripković A, Gojković SL. The origin of high activity of Pt-Au surfaces in the formic acid oxidation. in Electrochimica Acta. 2009;55(1):204-209.
doi:10.1016/j.electacta.2009.08.038 .

Obradović, Maja, Tripković, Amalija, Gojković, Snežana Lj., "The origin of high activity of Pt-Au surfaces in the formic acid oxidation" in Electrochimica Acta, 55, no. 1 (2009):204-209,
https://doi.org/10.1016/j.electacta.2009.08.038 . .

TY  - JOUR
AU  - Obradović, Maja
AU  - Vuković, Goran D.
AU  - Stevanović, Sanja
AU  - Panić, Vladimir
AU  - Uskoković, Petar
AU  - Kowal, Andrzej
AU  - Gojković, Snežana Lj.
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1420
AB  - Two samples of commercial multi-walled carbon nanotubes (Sigma-Aldrich and Sun Nanotech) and a sample of carbon black (Vulcan XC-72R) were investigated in raw state and after the activation in nitric and sulfuric acid by ultrasound agitation. Atomic force microscopy revealed that activated Sigma-Aldrich nanotubes are straight with corrugated walls (bamboo-like structure), while Sun Nanotech nanotubes are tortuous with smooth walls. Fourier transform infrared spectroscopy showed that abundance of oxygen-containing functional groups was formed on both Sigma-Aldrich and Sun Nanotech carbon nanotubes, as well as on carbon black surfaces. Electrochemical properties were studied by cyclic voltammetry and electrochemical impedance spectroscopy. It was found that the electrochemically active surface area of all carbon samples is expanded, charge storage ability is enhanced and the electron-transfer kinetics, probed by Fe(CN)(6)(3-)/Fe(CN)(6)(4-) redox couple, is promoted upon activation. The characteristics of carbon nanotubes were superior to Carbon black. Morphology of the carbon nanotubes was found to be important; nanotubes with corrugated walls showed faster electron-transfer and pseudocapacitive redox kinetics than nanotubes with smooth walls. This was explained by the higher proportion of edge and defect sites, which are known as more electrochemically active than the walls of uniform graphene structure.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - A comparative study of the electrochemical properties of carbon nanotubes and carbon black
EP  - 30
IS  - 1
SP  - 22
VL  - 634
DO  - 10.1016/j.jelechem.2009.07.001
ER  - 

@article{
author = "Obradović, Maja and Vuković, Goran D. and Stevanović, Sanja and Panić, Vladimir and Uskoković, Petar and Kowal, Andrzej and Gojković, Snežana Lj.",
year = "2009",
abstract = "Two samples of commercial multi-walled carbon nanotubes (Sigma-Aldrich and Sun Nanotech) and a sample of carbon black (Vulcan XC-72R) were investigated in raw state and after the activation in nitric and sulfuric acid by ultrasound agitation. Atomic force microscopy revealed that activated Sigma-Aldrich nanotubes are straight with corrugated walls (bamboo-like structure), while Sun Nanotech nanotubes are tortuous with smooth walls. Fourier transform infrared spectroscopy showed that abundance of oxygen-containing functional groups was formed on both Sigma-Aldrich and Sun Nanotech carbon nanotubes, as well as on carbon black surfaces. Electrochemical properties were studied by cyclic voltammetry and electrochemical impedance spectroscopy. It was found that the electrochemically active surface area of all carbon samples is expanded, charge storage ability is enhanced and the electron-transfer kinetics, probed by Fe(CN)(6)(3-)/Fe(CN)(6)(4-) redox couple, is promoted upon activation. The characteristics of carbon nanotubes were superior to Carbon black. Morphology of the carbon nanotubes was found to be important; nanotubes with corrugated walls showed faster electron-transfer and pseudocapacitive redox kinetics than nanotubes with smooth walls. This was explained by the higher proportion of edge and defect sites, which are known as more electrochemically active than the walls of uniform graphene structure.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "A comparative study of the electrochemical properties of carbon nanotubes and carbon black",
pages = "30-22",
number = "1",
volume = "634",
doi = "10.1016/j.jelechem.2009.07.001"
}

Obradović, M., Vuković, G. D., Stevanović, S., Panić, V., Uskoković, P., Kowal, A.,& Gojković, S. Lj.. (2009). A comparative study of the electrochemical properties of carbon nanotubes and carbon black. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 634(1), 22-30.
https://doi.org/10.1016/j.jelechem.2009.07.001

Obradović M, Vuković GD, Stevanović S, Panić V, Uskoković P, Kowal A, Gojković SL. A comparative study of the electrochemical properties of carbon nanotubes and carbon black. in Journal of Electroanalytical Chemistry. 2009;634(1):22-30.
doi:10.1016/j.jelechem.2009.07.001 .

Obradović, Maja, Vuković, Goran D., Stevanović, Sanja, Panić, Vladimir, Uskoković, Petar, Kowal, Andrzej, Gojković, Snežana Lj., "A comparative study of the electrochemical properties of carbon nanotubes and carbon black" in Journal of Electroanalytical Chemistry, 634, no. 1 (2009):22-30,
https://doi.org/10.1016/j.jelechem.2009.07.001 . .

TY  - JOUR
AU  - Obradović, Maja
AU  - Babić, Biljana M.
AU  - Kowal, Andrzej
AU  - Panić, Vladimir
AU  - Gojković, Snežana Lj.
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1305
AB  - The electrochemical characteristics of a mixture of Pt-black and WC powders and its catalytic activity for methanol and formic acid oxidation were investigated in acid solution. XRD and AFM measurements revealed that the WC powder employed for the investigation was a single-phase material consisting of crystallites/spherical particles of average size of about 50 nm, which were agglomerated into much larger particles. Cyclic voltammetry showed that the WC underwent electrochemical oxidation, producing tungstate species. In the case of the mixed Pt + WC powders, the tungstate species were deposited on the Pt as a thin film of hydrous tungsten oxide. Enhanced hydrogen intercalation in the hydrous tungsten oxide was observed and it was proposed to be promoted in mixed powders by the presence of hydrogen adatoms on bare Pt sites. The determination of Pt surface area in the Pt + WC layer by stripping of underpotentially deposited Cu revealed that the entire Pt surface was accessible for underpotential deposition of Cu. Investigation of the electrochemical oxidation of methanol and formic acid on Pt + WC and pure Pt layers did not indicate electrocatalytic promotion due to the presence of WC.
AB  - U radu su ispitivane elektrohemijske karakteristike smeše prahova Pt i WC i njena katalitička aktivnost za reakcije oksidacije metanola i mravlje kiseline u kiselom rastvoru. Analiza rezultata difrakcije X-zraka (XRD) i mikroskopije atomskih sila (AFM) pokazuju da je prah WC jednofazni materijal sa prosečnom veličinom kristalita od oko 50 nm, koji su aglomerisani u mnogo veće čestice. Ciklična voltametrija ukazuje na to da WC podleže oksidaciji kojom nastaju volframatne vrste. U slučaju smeše prahova Pt i WC, volframatne vrste najverovatnije se talože na Pt u obliku tankog sloja hidratisanih oksida volframa. Primećeno je povećanje interkalacije vodonika u sloju hidratisanih volframata i pretpostavlja se da prisustvo adatoma vodonika na površini Pt potpomaže proces vodonične interkalacije. Određivanje površine Pt u sloju Pt + WC desorpcijom monosloja Cu taloženog na potpotencijalima ukazuje da je čitava površina Pt dostupna za taloženje atoma Cu. Ispitivanje elektrohemijskih reakcija oksidacije metanola i mravlje kiseline na sloju smeše Pt + WC i sloju čiste Pt ukazuje da prisustvo praha WC ne utiče na elektrokatalitička svojstva Pt.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical properties of mixed WC and Pt-black powders
T1  - Elektrohemijska svojstva smeše prahova WC i Pt
EP  - 1209
IS  - 12
SP  - 1197
VL  - 73
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1305
ER  - 

@article{
author = "Obradović, Maja and Babić, Biljana M. and Kowal, Andrzej and Panić, Vladimir and Gojković, Snežana Lj.",
year = "2008",
abstract = "The electrochemical characteristics of a mixture of Pt-black and WC powders and its catalytic activity for methanol and formic acid oxidation were investigated in acid solution. XRD and AFM measurements revealed that the WC powder employed for the investigation was a single-phase material consisting of crystallites/spherical particles of average size of about 50 nm, which were agglomerated into much larger particles. Cyclic voltammetry showed that the WC underwent electrochemical oxidation, producing tungstate species. In the case of the mixed Pt + WC powders, the tungstate species were deposited on the Pt as a thin film of hydrous tungsten oxide. Enhanced hydrogen intercalation in the hydrous tungsten oxide was observed and it was proposed to be promoted in mixed powders by the presence of hydrogen adatoms on bare Pt sites. The determination of Pt surface area in the Pt + WC layer by stripping of underpotentially deposited Cu revealed that the entire Pt surface was accessible for underpotential deposition of Cu. Investigation of the electrochemical oxidation of methanol and formic acid on Pt + WC and pure Pt layers did not indicate electrocatalytic promotion due to the presence of WC., U radu su ispitivane elektrohemijske karakteristike smeše prahova Pt i WC i njena katalitička aktivnost za reakcije oksidacije metanola i mravlje kiseline u kiselom rastvoru. Analiza rezultata difrakcije X-zraka (XRD) i mikroskopije atomskih sila (AFM) pokazuju da je prah WC jednofazni materijal sa prosečnom veličinom kristalita od oko 50 nm, koji su aglomerisani u mnogo veće čestice. Ciklična voltametrija ukazuje na to da WC podleže oksidaciji kojom nastaju volframatne vrste. U slučaju smeše prahova Pt i WC, volframatne vrste najverovatnije se talože na Pt u obliku tankog sloja hidratisanih oksida volframa. Primećeno je povećanje interkalacije vodonika u sloju hidratisanih volframata i pretpostavlja se da prisustvo adatoma vodonika na površini Pt potpomaže proces vodonične interkalacije. Određivanje površine Pt u sloju Pt + WC desorpcijom monosloja Cu taloženog na potpotencijalima ukazuje da je čitava površina Pt dostupna za taloženje atoma Cu. Ispitivanje elektrohemijskih reakcija oksidacije metanola i mravlje kiseline na sloju smeše Pt + WC i sloju čiste Pt ukazuje da prisustvo praha WC ne utiče na elektrokatalitička svojstva Pt.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical properties of mixed WC and Pt-black powders, Elektrohemijska svojstva smeše prahova WC i Pt",
pages = "1209-1197",
number = "12",
volume = "73",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1305"
}

Obradović, M., Babić, B. M., Kowal, A., Panić, V.,& Gojković, S. Lj.. (2008). Electrochemical properties of mixed WC and Pt-black powders. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 73(12), 1197-1209.
https://hdl.handle.net/21.15107/rcub_technorep_1305

Obradović M, Babić BM, Kowal A, Panić V, Gojković SL. Electrochemical properties of mixed WC and Pt-black powders. in Journal of the Serbian Chemical Society. 2008;73(12):1197-1209.
https://hdl.handle.net/21.15107/rcub_technorep_1305 .

Obradović, Maja, Babić, Biljana M., Kowal, Andrzej, Panić, Vladimir, Gojković, Snežana Lj., "Electrochemical properties of mixed WC and Pt-black powders" in Journal of the Serbian Chemical Society, 73, no. 12 (2008):1197-1209,
https://hdl.handle.net/21.15107/rcub_technorep_1305 .

TY  - JOUR
AU  - Gojković, Snežana Lj.
AU  - Tripković, Amalija
AU  - Stevanović, Rade M.
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1108
AB  - The electrochemical oxidation of methanol, 2-propanol, and their mixtures was investigated on a Pt/C thin film electrode in acid solution. It was confirmed that the oxidation of 2-propanol commences at less positive potentials than that of methanol and exhibits significantly higher oxidation current densities at low potentials. When both methanol and 2-propanol were present in the solution, the onset of the oxidation current was the same as for the oxidation of pure 2-propanol. Although both alcohols inhibit the oxidation reaction of each other to a certain extent, steady-state polarization measurements showed that their mixture provides higher current densities than single alcohols over the entire potential region from the hydrogen region to oxide formation on the Pt surface. This implies that the addition of 2-propanol into the fuel may extend the operational range of direct methanol fuel cells.
AB  - Isptivana je elektrohemijska oksidacija metanola, 2-propanola i njihovih smeša na tankom filmu Pt/C katalizatora u kiseloj sredini. Potvrđeno je da oksidacija 2-propanola počinje na manje pozitivnim potencijalima nego oksidacija metanola i da daje znatno veće gustine struja pri nižim potencijalima. Kada su i metanol i 2-propanol prisutni u rastvoru, struja oksidacije se pojavljuje na istom potencijalu kao u slučaju čistog 2-propanola. Mada oba alkohola inhibiraju oksidaciju onog drugog u izvesnoj meri, stacionarma merenja su pokazala da njihova smeša daje veće gustine struja od pojedinačnih alkohola u celoj oblasti potencijala od vodonične oblasti pa do formiranja oksida na platini. To ukazuje da se radni opseg gorivog sprega sa metanolom može povećati dodatkom 2-propanola u gorivo.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Mixtures of methanol and 2-propanol as a potential fuel for direct alcohol fuel cells
T1  - Smeša metanola i 2-propanola kao potencijalno gorivo u gorivim spregovima sa alkoholom
EP  - 1425
IS  - 12
SP  - 1419
VL  - 72
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1108
ER  - 

@article{
author = "Gojković, Snežana Lj. and Tripković, Amalija and Stevanović, Rade M.",
year = "2007",
abstract = "The electrochemical oxidation of methanol, 2-propanol, and their mixtures was investigated on a Pt/C thin film electrode in acid solution. It was confirmed that the oxidation of 2-propanol commences at less positive potentials than that of methanol and exhibits significantly higher oxidation current densities at low potentials. When both methanol and 2-propanol were present in the solution, the onset of the oxidation current was the same as for the oxidation of pure 2-propanol. Although both alcohols inhibit the oxidation reaction of each other to a certain extent, steady-state polarization measurements showed that their mixture provides higher current densities than single alcohols over the entire potential region from the hydrogen region to oxide formation on the Pt surface. This implies that the addition of 2-propanol into the fuel may extend the operational range of direct methanol fuel cells., Isptivana je elektrohemijska oksidacija metanola, 2-propanola i njihovih smeša na tankom filmu Pt/C katalizatora u kiseloj sredini. Potvrđeno je da oksidacija 2-propanola počinje na manje pozitivnim potencijalima nego oksidacija metanola i da daje znatno veće gustine struja pri nižim potencijalima. Kada su i metanol i 2-propanol prisutni u rastvoru, struja oksidacije se pojavljuje na istom potencijalu kao u slučaju čistog 2-propanola. Mada oba alkohola inhibiraju oksidaciju onog drugog u izvesnoj meri, stacionarma merenja su pokazala da njihova smeša daje veće gustine struja od pojedinačnih alkohola u celoj oblasti potencijala od vodonične oblasti pa do formiranja oksida na platini. To ukazuje da se radni opseg gorivog sprega sa metanolom može povećati dodatkom 2-propanola u gorivo.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Mixtures of methanol and 2-propanol as a potential fuel for direct alcohol fuel cells, Smeša metanola i 2-propanola kao potencijalno gorivo u gorivim spregovima sa alkoholom",
pages = "1425-1419",
number = "12",
volume = "72",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1108"
}

Gojković, S. Lj., Tripković, A.,& Stevanović, R. M.. (2007). Mixtures of methanol and 2-propanol as a potential fuel for direct alcohol fuel cells. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 72(12), 1419-1425.
https://hdl.handle.net/21.15107/rcub_technorep_1108

Gojković SL, Tripković A, Stevanović RM. Mixtures of methanol and 2-propanol as a potential fuel for direct alcohol fuel cells. in Journal of the Serbian Chemical Society. 2007;72(12):1419-1425.
https://hdl.handle.net/21.15107/rcub_technorep_1108 .

Gojković, Snežana Lj., Tripković, Amalija, Stevanović, Rade M., "Mixtures of methanol and 2-propanol as a potential fuel for direct alcohol fuel cells" in Journal of the Serbian Chemical Society, 72, no. 12 (2007):1419-1425,
https://hdl.handle.net/21.15107/rcub_technorep_1108 .

TY  - JOUR
AU  - Tripković, Amalija
AU  - Gojković, Snežana Lj.
AU  - Popović, Ksenija
AU  - Lović, Jelena
AU  - Kowal, Andrzej
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1147
AB  - Electrochemical oxidation of HCOOH in H2SO4 and HCIO4 solutions was examined on thin film Pt2RU3/C electrode. XRD pattern revealed that Pt2RU3 alloy consisted of the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru. According to STM images, Pt2RU3 particles size was between 2 and 6 nm. It was established that electrochemical oxidation of HCOOH commenced at -0.1 V versus SCE at Pt sites in the catalyst. Kinetic parameters indicated that dehydrogenation path was predominant. Dehydration occurs in parallel, but without significant poisoning by COad dowing to oxidative removal by OH species on Ru atoms. The coverage Of Pt2RU3 surface by CO preadsorbed from the solution was found to be 24% lower when the surface was modified by irreversibly adsorbed Bi. Modification by Bi also shifted the onset potential for HCOOH oxidation for about 50 m V towards more negative values and consequently, increased the reaction rate for a factor of two. It was proposed that Ru acts through bifunctional mechanism, i.e. OH species adsorbed on Ru oxidizes COad from Pt sites, while Bi hinders the adsorption of CO on Pt sites via electronic and/or ensemble effects.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C
EP  - 893
IS  - 2
SP  - 887
VL  - 53
DO  - 10.1016/j.electacta.2007.07.073
ER  - 

@article{
author = "Tripković, Amalija and Gojković, Snežana Lj. and Popović, Ksenija and Lović, Jelena and Kowal, Andrzej",
year = "2007",
abstract = "Electrochemical oxidation of HCOOH in H2SO4 and HCIO4 solutions was examined on thin film Pt2RU3/C electrode. XRD pattern revealed that Pt2RU3 alloy consisted of the solid solution of Ru in Pt and the small amount of Ru or solid solution of Pt in Ru. According to STM images, Pt2RU3 particles size was between 2 and 6 nm. It was established that electrochemical oxidation of HCOOH commenced at -0.1 V versus SCE at Pt sites in the catalyst. Kinetic parameters indicated that dehydrogenation path was predominant. Dehydration occurs in parallel, but without significant poisoning by COad dowing to oxidative removal by OH species on Ru atoms. The coverage Of Pt2RU3 surface by CO preadsorbed from the solution was found to be 24% lower when the surface was modified by irreversibly adsorbed Bi. Modification by Bi also shifted the onset potential for HCOOH oxidation for about 50 m V towards more negative values and consequently, increased the reaction rate for a factor of two. It was proposed that Ru acts through bifunctional mechanism, i.e. OH species adsorbed on Ru oxidizes COad from Pt sites, while Bi hinders the adsorption of CO on Pt sites via electronic and/or ensemble effects.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C",
pages = "893-887",
number = "2",
volume = "53",
doi = "10.1016/j.electacta.2007.07.073"
}

Tripković, A., Gojković, S. Lj., Popović, K., Lović, J.,& Kowal, A.. (2007). Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 53(2), 887-893.
https://doi.org/10.1016/j.electacta.2007.07.073

Tripković A, Gojković SL, Popović K, Lović J, Kowal A. Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C. in Electrochimica Acta. 2007;53(2):887-893.
doi:10.1016/j.electacta.2007.07.073 .

Tripković, Amalija, Gojković, Snežana Lj., Popović, Ksenija, Lović, Jelena, Kowal, Andrzej, "Study of the kinetics and the influence of Bi-irr, on formic acid oxidation at Pt2RU3/C" in Electrochimica Acta, 53, no. 2 (2007):887-893,
https://doi.org/10.1016/j.electacta.2007.07.073 . .

TY  - JOUR
AU  - Gojković, Snežana Lj.
AU  - Tripković, Amalija
AU  - Stevanović, Rade M.
AU  - Krstajić, Nedeljko V.
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1153
AB  - Surface processes on Pt4Mo alloy well-defined by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were studied in acid solution by cyclic voltammetry. It was established that Mo in the alloy is much more resistant toward electrochemical dissolution than pure Mo. During the potential cycling of Pt4Mo surfaces in completely quiescent electrolyte, hydrous Mo-oxide could be generated on Mo sites. Investigation of the formic acid oxidation revealed that this type of Mo-oxide enhances the reaction rate by more than I order of magnitude with respect to pure Pt. Surface poisoning by COads is significantly lower on Pt4Mo alloy than on pure Pt. The effect of hydrous Mo-oxide on the HCOOH oxidation rate was explained through the facilitated removal of the poisoning species and through its possible influence on the intrinsic rate of the direct reaction path.
PB  - Amer Chemical Soc, Washington
T2  - Langmuir
T1  - High activity of Pt4Mo alloy for the electrochemical oxidation of formic acid
EP  - 12764
IS  - 25
SP  - 12760
VL  - 23
DO  - 10.1021/la702344s
ER  - 

@article{
author = "Gojković, Snežana Lj. and Tripković, Amalija and Stevanović, Rade M. and Krstajić, Nedeljko V.",
year = "2007",
abstract = "Surface processes on Pt4Mo alloy well-defined by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were studied in acid solution by cyclic voltammetry. It was established that Mo in the alloy is much more resistant toward electrochemical dissolution than pure Mo. During the potential cycling of Pt4Mo surfaces in completely quiescent electrolyte, hydrous Mo-oxide could be generated on Mo sites. Investigation of the formic acid oxidation revealed that this type of Mo-oxide enhances the reaction rate by more than I order of magnitude with respect to pure Pt. Surface poisoning by COads is significantly lower on Pt4Mo alloy than on pure Pt. The effect of hydrous Mo-oxide on the HCOOH oxidation rate was explained through the facilitated removal of the poisoning species and through its possible influence on the intrinsic rate of the direct reaction path.",
publisher = "Amer Chemical Soc, Washington",
journal = "Langmuir",
title = "High activity of Pt4Mo alloy for the electrochemical oxidation of formic acid",
pages = "12764-12760",
number = "25",
volume = "23",
doi = "10.1021/la702344s"
}

Gojković, S. Lj., Tripković, A., Stevanović, R. M.,& Krstajić, N. V.. (2007). High activity of Pt4Mo alloy for the electrochemical oxidation of formic acid. in Langmuir
Amer Chemical Soc, Washington., 23(25), 12760-12764.
https://doi.org/10.1021/la702344s

Gojković SL, Tripković A, Stevanović RM, Krstajić NV. High activity of Pt4Mo alloy for the electrochemical oxidation of formic acid. in Langmuir. 2007;23(25):12760-12764.
doi:10.1021/la702344s .

Gojković, Snežana Lj., Tripković, Amalija, Stevanović, Rade M., Krstajić, Nedeljko V., "High activity of Pt4Mo alloy for the electrochemical oxidation of formic acid" in Langmuir, 23, no. 25 (2007):12760-12764,
https://doi.org/10.1021/la702344s . .

TY  - JOUR
AU  - Obradović, Maja
AU  - Grgur, Branimir
AU  - Gojković, Snežana Lj.
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/982
AB  - Ni-W alloys were electrochemically deposited from an ammonia-citrate electrolyte on rotating disc electrode with a gold disc, by direct and pulsating current. The corrosion potential and kinetics of cathodic and anodic reaction were investigated on the alloys with molar fraction of tungsten from 0.11 to 0.25 in acid and neutral sulfate solutions of various pH. On the basis of kinetic equations resulting from these data, it was proposed that a barrier lazer of nickel and tungsten oxide was formed on the alloy surface preventing further alloy dissolution.
AB  - Prevlake legure Ni-W su elektrohemijski taložene iz amonijačno-citratnog elektrolita, na rotirajuću disk elektrodu od zlata, konstantnom i pulsirajućom strujom. Korozioni potencijal, kinetika katodne i anodne reakcije na elektrohemijski taloženim prevlakama legura Ni-W, sa udelom volframa od 0,11 do 0,25, su ispitivani u kiselim i neutralnim sulfatnim rastvorima, različitih pH vrednosti. Na osnovu dobijenih rezultata izvedene su kinetičke jednačine za katodnu i anodnu reakciju, koje ukazuju na formiranje barijernog sloja oksida volframa i nikla koji sprečava rastvaranje legure i delimično se redukuje pri katodnoj polarizaciji.
PB  - Engineering Society for Corrosion, Belgrade, Serbia
T2  - Zaštita materijala
T1  - Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys
T1  - Kinetika korozionih reakcija u kiselim i neutralnim rastvorima na elektrohemijski taloženim legurama Ni-W
EP  - 10
IS  - 2
SP  - 3
VL  - 47
UR  - https://hdl.handle.net/21.15107/rcub_technorep_982
ER  - 

@article{
author = "Obradović, Maja and Grgur, Branimir and Gojković, Snežana Lj.",
year = "2006",
abstract = "Ni-W alloys were electrochemically deposited from an ammonia-citrate electrolyte on rotating disc electrode with a gold disc, by direct and pulsating current. The corrosion potential and kinetics of cathodic and anodic reaction were investigated on the alloys with molar fraction of tungsten from 0.11 to 0.25 in acid and neutral sulfate solutions of various pH. On the basis of kinetic equations resulting from these data, it was proposed that a barrier lazer of nickel and tungsten oxide was formed on the alloy surface preventing further alloy dissolution., Prevlake legure Ni-W su elektrohemijski taložene iz amonijačno-citratnog elektrolita, na rotirajuću disk elektrodu od zlata, konstantnom i pulsirajućom strujom. Korozioni potencijal, kinetika katodne i anodne reakcije na elektrohemijski taloženim prevlakama legura Ni-W, sa udelom volframa od 0,11 do 0,25, su ispitivani u kiselim i neutralnim sulfatnim rastvorima, različitih pH vrednosti. Na osnovu dobijenih rezultata izvedene su kinetičke jednačine za katodnu i anodnu reakciju, koje ukazuju na formiranje barijernog sloja oksida volframa i nikla koji sprečava rastvaranje legure i delimično se redukuje pri katodnoj polarizaciji.",
publisher = "Engineering Society for Corrosion, Belgrade, Serbia",
journal = "Zaštita materijala",
title = "Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys, Kinetika korozionih reakcija u kiselim i neutralnim rastvorima na elektrohemijski taloženim legurama Ni-W",
pages = "10-3",
number = "2",
volume = "47",
url = "https://hdl.handle.net/21.15107/rcub_technorep_982"
}

Obradović, M., Grgur, B.,& Gojković, S. Lj.. (2006). Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys. in Zaštita materijala
Engineering Society for Corrosion, Belgrade, Serbia., 47(2), 3-10.
https://hdl.handle.net/21.15107/rcub_technorep_982

Obradović M, Grgur B, Gojković SL. Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys. in Zaštita materijala. 2006;47(2):3-10.
https://hdl.handle.net/21.15107/rcub_technorep_982 .

Obradović, Maja, Grgur, Branimir, Gojković, Snežana Lj., "Kinetic of corrosion reactions in acid and neutral solutions on electrochemically deposited Ni-W alloys" in Zaštita materijala, 47, no. 2 (2006):3-10,
https://hdl.handle.net/21.15107/rcub_technorep_982 .