Abstract: With a long chain conjugated structure and morphology of porous carrier，polypyrrole （PPy) shows advantages of high conductivity，long stability and non-toxicity. But PPy has loose structure and its thermal stability and electrical conductivity are not as good as carbon. PPy as a component of Pt catalyst support for PEMFC is favorable for setting up an effective conducting network for electron and proton transportation and may improve the surface morphology for platinum deposition，and then Pt utilization can be significantly improved. PPy-based transition metal catalyst shows excellent oxygen reduction reaction properties for PEMFC. Optimizing synthesis conditions，changing the mass ratio of components，heat treatment，and doping may improve the performance of PEMFC catalyst. The synergistic effect of M-PPy-C and Pt can be utilized to synthesize Pt/M-PPy-C catalyst with high activity and good durability.

Key words: fuel cells, support, polypyrrole, electrical conductivity, oxygeon reductive reaction(ORR)

摘要： 聚吡咯（polypyrrole，PPy）具有长链状共轭结构及多孔的载体形貌，且显示出高电导率、良好稳定性和无毒等优点，但PPy结构疏松且热稳定性和导电性不如碳材料。本文简述了PPy修饰载体后能为催化反应提供高效的电子和质子传导网络，并能通过改善载体表面形态更好地分散Pt，提高Pt的利用率。此外，本文还概述了聚吡咯类过渡金属复合催化剂在质子交换膜燃料电池（PEMFC）中表现出良好的氧还原反应（ORR）性能，且可通过优化合成条件、改变各成分的质量比、热处理或掺杂等方法提高此类非铂催化剂的性能。最后提出可利用M-PPy-C和Pt的协同效应，制备高活性和耐久性良好的Pt/M-PPy-C催化剂。

关键词: 燃料电池, 载体, 聚吡咯, 导电性, 氧还原反应