| Na~+对PEMFC Pt/C气体扩散电极的影响 |
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| 引用本文： | 揭晓,候俊波,邵志刚,衣宝廉.Na~+对PEMFC Pt/C气体扩散电极的影响[J].电源技术,2009,33(3). |
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| 作者姓名： | 揭晓 候俊波 邵志刚 衣宝廉 |
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| 作者单位： | 中国科学院大连化学物理研究所,辽宁,大连,116023 |
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| 摘 要： | 采用燃料电池半电池体系模拟了质子交换膜燃料电池(PEMFC)中Na+污染气体扩散电极时的工况,研究了Na+对PEMFC常用的Pt/C气体扩散电极性能的影响.通过循环伏安曲线和电化学阻抗谱,测试了电极在Na+污染前后催化层电化学比表面积(ECA)和电极反应界面上的电荷转移电阻发生的变化.实验结果表明,随Na+污染浓度的增大,电极性能逐渐下降;污染后电极催化层电化学活性比表面积出现明显减少,当污染物浓度为10 000X 10-6时,ECA降低了43%;外加相同电位时,随Na+污染的增加,电极反应界面上的电荷转移电阻逐渐增大.Na+的存在对Pt/C气体扩散电极具有明显毒化作用.
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| 关 键 词： | 质子交换膜燃料电池 金属离子污染 燃料电池半电池 气体扩散电极 |
Effect of impurity Na~+ on Pt/C gas-diffusion electrode in PEMFC |
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| JIE Xiao,HOU Jun-bo,SHAO Zhi-gang,YI Bao-lian.Effect of impurity Na~+ on Pt/C gas-diffusion electrode in PEMFC[J].Chinese Journal of Power Sources,2009,33(3). |
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| Authors: | JIE Xiao HOU Jun-bo SHAO Zhi-gang YI Bao-lian |
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| Affiliation: | Fuel Cell System and Engineering Laboratory;Dalian Institute of Chemical Physics;Chinese Academy of Sciences;Dalian Liaoning 116023;China |
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| Abstract: | By using a half fuel cell set-up to simulate the working condition of Na+ contamination, the effect of impurity Na+ on Pt/C gas-diffusion electrode which is wildly used in PEMFC was investigated.The performance of half fuel cell was seriously influenced by impurity Na+ contamination.By testing cyclic voltammetry and electrochemical impedance spectrum, the obvious change of the electrochemically active specific surface area of contaminated catalyst and the charge transfer resistance between reaction interfac... |
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| Keywords: | proton exchange membrane fuel cell cation contaminants half fuel cell gas-diffusion electrode |
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