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电化学  2009 

质子交换膜燃料电池中的电化学催化

, PP. 403-411

Keywords: 燃料电池,电化学催化,氧还原,甲醇氧化,甲酸氧化,DFT,电极过程动力学,抗溺水性,Pt利用率

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Abstract:

系统介绍了重庆大学在质子交换膜燃料电池(PEMFC)电化学催化方面的研究工作.指出PEMFC成流过程中造成电池性能衰减及寿命短与催化剂和膜电极(MEA)相关的主要因素有:催化剂在载体表面迁移、聚结、溶解,随同载体腐蚀一并流失,催化剂中毒,MEA催化层水淹导致反应气体短缺而引起的"负差效应"以及小分子有机物缓慢的氧化动力学.重庆大学燃料电池研究小组近年来从分子模拟机理出发,结合实验求证,探索制备高活性、高稳定性、高催化剂利用率、抗溺水性电极的方法、技术和手段,为提高催化剂的寿命和利用率,降低催化剂成本,寻求可行的解决办法.

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