| 提高石墨插层铂催化剂利用率和抗中毒能力的分析 |
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| 引用本文： | 刘薇,彭晓峰,王补宣. 提高石墨插层铂催化剂利用率和抗中毒能力的分析[J]. 热科学与技术, 2004, 3(4): 373-376 |
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| 作者姓名： | 刘薇 彭晓峰 王补宣 |
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| 作者单位： | 清华大学,热能系,北京,100084 |
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| 摘 要： | 从两个角度对比传统的石墨载铂催化剂与石墨插层铂催化剂的性能：在结构模型的基础上分析催化剂的铂利用率；在传质模型的基础上分析催化剂中CO的分子扩散速度。肯定了插层催化剂是一种从物理角度提高质子交换膜燃料电池催化剂PEMFC利用率、防止抗中毒能力的有效手段。
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| 关 键 词： | 铂催化剂 石墨插层 传质模型 分子扩散 CO 性能 防止 质子交换膜燃料电池 PEMFC 角度 |
| 文章编号： | 1671-8097(2004)04-0373-04 |
| 修稿时间： | 2004-05-22 |
Improvement of Pt utilization and carbon monoxide toleracne using platinum-graphite intercalation catalysts |
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| LIU Wei,PENG Xiao-feng,WANG Bu-xuan. Improvement of Pt utilization and carbon monoxide toleracne using platinum-graphite intercalation catalysts[J]. Journal of Thermal Science and Technology, 2004, 3(4): 373-376 |
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| Authors: | LIU Wei PENG Xiao-feng WANG Bu-xuan |
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| Abstract: | The characteristics of platinum catalysts supported on graphite were compared with those of platinum catalysts intercalated in graphite. In particular, the Pt utilization was investigated based on their structure models, and the CO-diffusion was theoretically analyzed using mass transfer models. The analytic result affirms that Pt-intercalated in graphite catalysts is an effective physical approach to improve catalysts resistance to carbon monoxide in PEMFCs. |
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| Keywords: | graphite intercalation compounds (GICs) CO poisoning Pt utilization Fick diffusion Knudsen diffusion |
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