| 甲醇电化学氧化催化剂的失活机理研究 |
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| 引用本文： | 陈维民,苏会东,辛勤.甲醇电化学氧化催化剂的失活机理研究[J].沈阳理工大学学报,2009,28(2). |
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| 作者姓名： | 陈维民 苏会东 辛勤 |
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| 作者单位： | 1. 沈阳理工大学,环境与化学工程学院,辽宁,沈阳110168
2. 中国科学院大连化学物理研究所 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 采用电化学老化试验研究了PtRu催化剂的活性衰减过程.结果表明,老化试验后,电催化剂的粒径有所增加,这在一定程度上减小了催化剂的表面积,降低了催化活性.更为严重的是,催化层中活性组分的流失改变了催化剂的组成,使催化剂对甲醇氧化反应的催化活性大幅降低.这是导致PtRu催化剂失活的重要原因.
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| 关 键 词： | 直接甲醇燃料电池 电催化剂 失活 老化试验 |
A Study on the Activity Loss Mechanism of Methanol Electro-oxidation Catalysts |
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| CHEN Wei-min,SU Hui-dong,XIN Qin.A Study on the Activity Loss Mechanism of Methanol Electro-oxidation Catalysts[J].Transactions of Shenyang Ligong University,2009,28(2). |
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| Authors: | CHEN Wei-min SU Hui-dong XIN Qin |
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| Affiliation: | 1.Shenyang Ligong University;Shenyang 110168;China;2.Dalian Institute of Chemical Physics;Chinese Academy of Sciences |
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| Abstract: | The performance degradation of PtRu catalyst is investigated by the electrochemical aging test.The results show that after the aging test,the particle size of the electrocatalyst increases to some extent,resulting in the loss of surface area and the lowered catalytic activity.Moreover,the loss of active components from the catalyst layer changes the catalyst composition,and makes the catalytic activity for the methanol oxidation reaction declined remarkably.This is thought to be the most important factor re... |
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| Keywords: | direct methanol fuel cell electrocatalyst activity loss aging test |
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