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Development of the highly active cathode catalysts for oxygen reduction reaction (ORR) is one of the most important subjects to achieve a high efficiency at polymer electrolyte fuel cells (PEFCs). For the screening process of the catalyst, it is essential to evaluate precisely kinetically controlled ORR activities at the electrodes and to quantify a reaction by-product, H2O2, which may deteriorate the polymer electrolyte membrane or gaskets, over wide temperature range. Recently, we found that Pt alloys such as Pt-Fe, Pt-Co, and Pt-Ni exhibited very high ORR activity. In the present research, we evaluated their ORR activities and H2O2 production rate by using channel flow double electrodes (CFDE) at 20-90C.

Temperature-Dependence of Oxygen Reduction Reaction Activity at Platinum Alloy Electrocatalysts