质子交换膜燃料电池用Pt-Ag-Co/C催化剂的耐久性研究  

Durability of Pt-Ag-Co/C Catalyst in PEMFC

作　　者：蒋鑫[1] 尤欣敏[1] 赵志刚[1,2,3] 

机构地区：[1]南京工业大学化学化工学院,南京210009 [2]江苏省氢能燃料电池工程技术研究中心,江苏海安210066 [3]南京市氢能关键材料工程技术研究中心,南京210009

出　　处：《贵金属》2015年第4期9-14,共6页Precious Metals

基　　金：南京工业大学材料化学工程国家重点实验室项目(38901159);南京工业大学化工优势学科项目(38701001)

摘　　要：研究了两步法制备的质子交换膜燃料电池(PEMFC)用Pt-Ag-Co/C催化剂的耐久性。循环伏安曲线测试表明Pt-Ag-Co/C催化剂与商业Pt/C催化剂的电催化活性相当。通过对扫描500次的循环伏安曲线分析,计算出Pt/C和Pt-Ag-Co/C催化剂扫描前后电化学活性面积(ECA),进而研究了催化剂在PEMFC中的耐久性。结果表明,耐久性实验后Pt/C催化剂的ECA降低了87%;而Pt-Ag-Co/C催化剂仅降低了35%。研究表明微量Co的添加有效的提高了Pt-Ag/C催化剂的耐久性。Pt-Ag-Co/C catalyst for the proton exchange membrane fuel cell（PEMFC） was prepared by a two-step process, and its durability was investigated. The cyclic voltametric（CV） tests show that the electro-catalytic activity of Pt-Ag-Co/C and commercial Pt/C catalyst is almost identical. The long-term durability of Pt-Ag-Co/C and Pt/C catalysts was evaluated by comparing electrochemical catalytic active surface areas（ECA） before and after 500 cycles in CV. ECA was reduced by 87% for Pt/C catalyst while only 35% for Pt-Ag-Co/C catalyst. The results indicate that a small amount of Co in Pt-Ag-Co/C catalyst improves the durability.

关 键 词：材料化学 质子交换膜燃料电池 Pt-Ag-Co/C催化剂 两步法 耐久性 

分 类 号：TM911.48[电气工程—电力电子与电力传动]