PdCo oxygen reduction electrocatalyst for polymer electrolyte membrane and direct methanol fuel cells

Carbon-supported Pd–Co alloy electrocatalyst were synthesized and characterized for the purpose of the fuel cell cathode oxygen reduction reaction (ORR). An impregnation method was employed for the synthesis, in which EG was used as a reducing agent. The synthesized catalyst was characterized in terms of catalytic activity by electrochemical measurements. Surface cyclic voltammetry was used to confirm the formation of the Pd–Co alloy. In order to improve activity and stability, the catalyst was heat-treated in the temperature of 3000C. The catalyzed ORR kinetics were also studied using the rotating disk electrode (RDE) method. Electrocatalytic ORR activity was also examined in an acidic solution containing methanol. The results showed that the synthesized Pd–Co/C catalyst has methanol tolerant capabilities.

کلیدواژه ها:

Pd–Co alloy ، Oxygen reduction reaction ، Proton exchange membrane fuel cell (PEMFC) ، Methanol tolerance