TY  - JOUR
AU  - Dešić, Maja N.
AU  - Popović, Milica
AU  - Obradović, Maja
AU  - Vračar, Ljiljana M.
AU  - Grgur, Branimir N.
PY  - 2005
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/202
AB  - Surface modification of the electrodes was conducted from sulfuric acid solutions containing the corresponding metal-chloride complexes using cyclic voltammeter. Comparing the charges of the hydrogen underpotential deposition region, and the corresponding oxide reduction regions, it is concluded that a platinum overlayer on gold forms 3D islands, while gold on platinum forms 2D islands. Foreign metals present in an amount of up to one monolayer exert an influence on the change in reaction rate with respect to both hydrogen evolution (HER) and oxygen reduction (ORR) reactions. Aplatinum overlayer on a gold substrate increases the activity for HER and for ORR, compared with pure gold. These results can be understood in terms of a simple model, in which the change in the H and OH binding energies are directly proportional to the shift of the d-bond center of the overlayer. On the contrary, a gold layer on platinum slightly decreases the activity for both reactions compared with pure platinum.
AB  - Površinska modifikacija platine zlatom i zlata platinom je izvršena iz rastvora sumporne kiseline i odgovarajućih hloridnih kompleksa metala primenom ciklične voltametrije. Poređenjem količine naelektrisanja u oblasti potpotencijalne depozicije vodonika i odgovarajućih oblasti redukcije oskida čistih i modifikovanih elektroda zaključeno je da platina na zlatu formira 3D, a zlato na platini 2D ostrva. Aktivnosti ovako modifikovanih površina za reakcije izdvajanja vodonika i redukcije kiseonika u rastvoru sumporne kiseline poređene sa aktivnostima čistih metala. Elektroda od zlata modifikovana platinom značajno uvećava aktivnost za obe ispitivane rekacije u poređenju sa čistim zlatom. Sa druge strane, elektroda od platine modifikovana zlatom ima neznatno manju aktivnost u poređenju sa čistom platinom. Zbog ograničenih resursa i visoke cene platine platina modifikovana zlatom može biti zamena za čistu platinu kao dobar katalizator za reakciju redukcije kiseonika, posebno u gorivim spregovima u oblasti niskih temperatura.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction
T1  - Površinska modifikacija platine zlatom i zlata platinom i njen uticaj na reakcije izdvajanja vodonika i redukcije kiseonika
VL  - 70
IS  - 2
SP  - 231
EP  - 242
DO  - 10.2298/JSC0502231D
ER  - 

@article{
author = "Dešić, Maja N. and Popović, Milica and Obradović, Maja and Vračar, Ljiljana M. and Grgur, Branimir N.",
year = "2005",
abstract = "Surface modification of the electrodes was conducted from sulfuric acid solutions containing the corresponding metal-chloride complexes using cyclic voltammeter. Comparing the charges of the hydrogen underpotential deposition region, and the corresponding oxide reduction regions, it is concluded that a platinum overlayer on gold forms 3D islands, while gold on platinum forms 2D islands. Foreign metals present in an amount of up to one monolayer exert an influence on the change in reaction rate with respect to both hydrogen evolution (HER) and oxygen reduction (ORR) reactions. Aplatinum overlayer on a gold substrate increases the activity for HER and for ORR, compared with pure gold. These results can be understood in terms of a simple model, in which the change in the H and OH binding energies are directly proportional to the shift of the d-bond center of the overlayer. On the contrary, a gold layer on platinum slightly decreases the activity for both reactions compared with pure platinum., Površinska modifikacija platine zlatom i zlata platinom je izvršena iz rastvora sumporne kiseline i odgovarajućih hloridnih kompleksa metala primenom ciklične voltametrije. Poređenjem količine naelektrisanja u oblasti potpotencijalne depozicije vodonika i odgovarajućih oblasti redukcije oskida čistih i modifikovanih elektroda zaključeno je da platina na zlatu formira 3D, a zlato na platini 2D ostrva. Aktivnosti ovako modifikovanih površina za reakcije izdvajanja vodonika i redukcije kiseonika u rastvoru sumporne kiseline poređene sa aktivnostima čistih metala. Elektroda od zlata modifikovana platinom značajno uvećava aktivnost za obe ispitivane rekacije u poređenju sa čistim zlatom. Sa druge strane, elektroda od platine modifikovana zlatom ima neznatno manju aktivnost u poređenju sa čistom platinom. Zbog ograničenih resursa i visoke cene platine platina modifikovana zlatom može biti zamena za čistu platinu kao dobar katalizator za reakciju redukcije kiseonika, posebno u gorivim spregovima u oblasti niskih temperatura.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction, Površinska modifikacija platine zlatom i zlata platinom i njen uticaj na reakcije izdvajanja vodonika i redukcije kiseonika",
volume = "70",
number = "2",
pages = "231-242",
doi = "10.2298/JSC0502231D"
}

Dešić, M. N., Popović, M., Obradović, M., Vračar, L. M.,& Grgur, B. N.. (2005). Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 70(2), 231-242.
https://doi.org/10.2298/JSC0502231D

Dešić MN, Popović M, Obradović M, Vračar LM, Grgur BN. Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction. in Journal of the Serbian Chemical Society. 2005;70(2):231-242.
doi:10.2298/JSC0502231D .

Dešić, Maja N., Popović, Milica, Obradović, Maja, Vračar, Ljiljana M., Grgur, Branimir N., "Study of gold-platinum and platinum-gold surface modification and its influence on hydrogen evolution and oxygen reduction" in Journal of the Serbian Chemical Society, 70, no. 2 (2005):231-242,
https://doi.org/10.2298/JSC0502231D . .