以NaBH4为还原剂,将K2PtCl6和AgNO3前体进行共还原制备了一系列具有不同组成的碳载PtmAg/C合金催化剂(m为Pt/Ag原子比,m为0.05 ～1.0),在酸性介质中考察了该系列催化剂对甲醇氧化反应的电催化性能.与单组分Pt/C催化剂相比,系列PtmAg/C催化剂呈现出较高的催化氧化甲醇的活性与抗CO毒化能力,而且该催化剂的性能与其组成密切相关.随m值增加,PtmAg/C催化剂对甲醇氧化反应的质量比催化活性(MSA)、本征催化活性(IA)与稳定性均逐步增加,当m=0.5时催化活性达到最高,其MSA和IA分别是Pt/C催化剂的5.1和4.8倍.
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