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研究论文

PEMFC商用催化剂电催化活性和寿命研究(英文)

  • 程璇
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  • 厦门大学化学系固体表面物理化学国家重点实验室,厦门大学化学系固体表面物理化学国家重点实验室,厦门大学化学系固体表面物理化学国家重点实验室,厦门大学材料科学与工程系,厦门大学材料科学与工程系,厦门大学化学系固体表面物理化学国家重点实验室,厦门大学材料科学与工程系,美国气体技术研究院 福建厦门,361005 ,福建厦门,361005 ,福建厦门,361005 ,福建厦门,361005 ,福建厦门,361005 ,福建厦门,361005 ,福建厦门,361005 ,伊利诺伊斯60018

收稿日期: 2004-05-28

  修回日期: 2004-05-28

  网络出版日期: 2004-05-28

Electrocatalytic and Lifetime Studies of Commercial Catalystsin a PEMFC

  • CHENG Xuan~
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  • (*1), MA Yan-yun~1, QI Li~1, PENG Cheng~(2), CHEN Ling~(2), ZHAO Jun~1, ZHANG Ying~(2),FAN Qin-bai~3 ysical Chemistry of Solid Surfaces,Xiamen University, Xiamen 361005,China, 2.Department of Materials Science & Engineering, Xiamen University, Xiamen 361005, China, 3. Gas Technology Institute,Des Plaines, IL 60018, USA

Received date: 2004-05-28

  Revised date: 2004-05-28

  Online published: 2004-05-28

摘要

采用自设计的特制H 形电解槽模拟单个氢 空气质子交换膜燃料电池运作,并以电化学方法、SEM及XRD等技术研究两种商用催化剂,即碳载铂(Pt/C)和纯铂钌(Pt Ru)的电催化活性、表面形貌及其结构和寿命.同时对比了两种催化剂分别放在H 形电解槽和常规电解槽中运行情况的测试结果.实验表明,经过H 形电解槽运行后的催化剂,其循环伏安曲线表征氢吸脱的特征峰分别发生了正偏移(Pt/C电极)和负偏移(Pt Ru电极),且对应的峰电流呈现减小的趋势(特别是Pt/C电极).一氧化碳的毒化造成纯铂钌的电催化活性显著下降,其影响是不可逆的.

本文引用格式

程璇 . PEMFC商用催化剂电催化活性和寿命研究(英文)[J]. 电化学, 2004 , 10(2) : 137 -144 . DOI: 10.61558/2993-074X.1558

Abstract

A particularly designed H-type cell was used to simulate the operating condition of a hydrogen-air proton exchange membrane fuel cell (PEMFC). The electrocatalytic activity, morphology, structure and lifetime of commercially available catalysts, carbon support platinum (Pt/C) and unsupported platinum-ruthenium (Pt-Ru), were preliminary studied by carrying out electrochemical measurements and by SEM, XRD techniques. The catalysts were simultaneously tested in the H-cell under operation, and also separately tested in a conventional electrochemical cell for comparison. It was found that the characteristic peaks of hydrogen adsorption/desorption on cyclic voltammograms shifted considerably to a more positive direction for Pt/C, while a more negative direction for Pt-Ru. The magnitude of the peak current densities on CV curves, especially observed from Pt/C catalyst, tended to reduce after the lifetime tests. The electrocatalytic activity of Pt-Ru was significantly lower due to carbon monoxide poison, and the effect of CO on catalyst was irreversible.

参考文献

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