【摘要】 主要研究了双催化层阳极的稳定性,考察了直接甲醇燃料电池(DMFC)在623h寿命测试过程中的运行规律和性能衰退因素,探索了恢复电极性能或缓解电极性能衰退的方法。结果表明,对阳极催化层进行电位扫描(Potentialsweep),可以氧化去除催化剂表面的吸附物种,一定程度上恢复电极性能或缓解电极性能衰退过程。电池寿命测试及扫描电子显微镜(SEM)和能量散射X射线谱(EDX)分析结果说明双催化层阳极结构具有良好的稳定性。更多还原

【Abstract】 In the present study,the durability performance of double catalytic layer anode for DMFC was investigated.During 623h lifetime,the factors of performance degradation were analyzed,and the recovery or mitigation strategies were explored.Long-term test results indicated that the double layer catalytic exhibits good performance and stable microstructure.The degradation can be timely mitigated by a potential sweep,which is a good method to eliminate the adsorbed intermediate species on the catalyst surface from methanol electro-oxidation.更多还原