Abstract
Non-precious metal catalysts (NPMCs) with high activity and stability are developed for oxygen reduction reaction (ORR) in alkaline membrane fuel cell (AMFC). A variety of important parameters determining the performance of AMFC are systematically investigated, including the ratio of catalyst to ionomer at cathode, the flow rates of oxygen and air, and the fuel cell operating temperatures. An optimum catalyst/ionomer ratio range of 7:3 to 8:2 was found for the NPMC-based cathode in both H2/O2 and H2/air cases. The operating temperature was demonstrated to play the crucial role in determining the AMFC performances.
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