Electrocatalytic properties of platinum and it's binary alloy with vanadium in oxygen reduction reaction(ORR)
محورهای موضوعی : Journal of Physical & Theoretical Chemistry
Mohammad Yari
1
(Not-mentioned)
Sajjad Sedaghat Sherehjini
2
(Not-mentioned)
کلید واژه: Oxygen reduction reaction, Platinum- Vanadium alloy, Gas
, 
, diffusion-electrode, Polymer electrolyte membrane f,
چکیده مقاله :
The electrocatalysis of the oxygen reduction reaction (ORR) on carbon supportedPt-V (1:1) catalyst in polymer electrolyte fuel cells (PEFC) was investigated. Atan oxygen pressure of one atm an enhanced electrocatalytic property of Pt-V/Ccompared with Pt/C is revealed. These results indicate the occurrence of adifferent electrocatalytic mechanism for the ORR on Pt/C and Pt-V/C. Anincrease of mass transport overpotentials is observed for the Pt-V/C catalyst, andthis was related to the presence of vanadium oxide. So the ORR activity of Pt-V/Cat oxygen pressure of one atm is higher than that of Pt/C.
