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学科主题: 物理化学
题名: Lifetime Test of Pt-Pd/C PEMFC Cathode Catalyst
作者: Zhou ZM(周志敏) ;  Qin XP(秦晓平) ;  Chen XG(陈旭光) ;  Shao ZG(邵志刚) ;  Yi BL(衣宝廉)
会议名称: THE 8TH INTERNATIONAL SYMPOSIUM ON NEW MATERIALS AND NANO-MATERIALS FOR ELECTROCHEMICAL SYSTEMS
会议日期: 2010-7-11
出版日期: 2010-07-11
会议地点: 中国
通讯作者: 邵志刚
部门归属: 三室
主办者: 上海交通大学
摘要: Durability of the catalysts is a major problem that hindering the commercialization of proton exchanges membrane fuel cells (PEMFCs). Recently, much attention has been paid to Pt-Pd catalyst supported on carbon due to its better performance as oxygen reduction reaction catalsyt. Here we presented a durability test result of the Pt3Pd/C catalyst and compared with a commercial Pt/C catalyst. The I-V curves are presented in Fig.1. The initial performance was close to each other. However, after 400 hours operation under dynamic loading, the Pt3Pd/C catalysts showed very little degradation especially in the low current density region which was recognized as the kinetically controlled region. The changes of electrochemical active area derived from the CV are shown in Fig.2. After 400 hours, 37% of the initial ECA was lost for Pt3Pd/C while 58% for Pt/C. EIS was also adpapte to monitor the performance change of the catalysts. After the durability test, the diameter of the EIS arc for Pt/C increased largely when compared to the beginning of the test. However, the Pt3Pd/C only changed a little. All the findings demonstrated that Pt-Pd/C catalyst has a higher durability than conventional Pt/C catalyst. TEM &XRD characerization revealed that the Pt-Pd/C catalyst has a larger particle size than Pt/C. The reason may ascribe to electronic modification effect, which improves both activity and durablity of the nano sized catalyst.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/114318
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Zhou ZM,Qin XP,Chen XG,et al. Lifetime Test of Pt-Pd/C PEMFC Cathode Catalyst[C]. 见:THE 8TH INTERNATIONAL SYMPOSIUM ON NEW MATERIALS AND NANO-MATERIALS FOR ELECTROCHEMICAL SYSTEMS. 中国. 2010-7-11.
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