ANODE-SIDE CATALYST COMPOSITION FOR FUEL CELLS, AND MEMBRANE ELECTRODE ASSEMBLY (MEA) FOR SOLID POLYMER FUEL CELLS WHICH COMPRISES SAME

A technology is provided that is capable of improving deterioration of a fuel cell due to non-stationary operation (startup/shutdown, fuel depletion). An anode-side catalyst composition comprising a catalyst having catalyst particles carried on electrically conductive material and an ion exchange resin, characterized in that the catalyst particle are formed of an alloy of which oxygen reduction capability and water electrolysis are both lower than those of platinum, and which has hydrogen oxidation capability.