Performance and kinetics of Pt–CNT catalyst electrodes in a PEM fuel cell
Performance and kinetics of Pt–CNT catalyst electrodes in a PEM fuel cell
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DOI：
10.1557/jmr.2012.71
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发表时间：
2012-06
影响因子：
2.7
通讯作者：
A. Afolabi;A. Abdulkareem;S. Iyuke;Hendrick Christoffel Zyl Pienaar
中科院分区：
文献类型：
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作者：
A. Afolabi;A. Abdulkareem;S. Iyuke;Hendrick Christoffel Zyl Pienaar
研究了不同铂催化剂负载量的碳纳米管（CNTs）膜电极和磺化膜电极在恒温、恒压条件下的性能。制造的MEA在单个质子交换膜（PEM）燃料电池单元中分别使用氢气和氧气作为燃料和氧化剂气体进行测试。所获得的结果表明，电池中MEA的性能随着电极上催化剂负载量的增加而改善。对燃料电池动力学获得的结果表明，用30和40wt% Pt催化剂电极制造的MEA样品符合塔菲尔方程，而用10和20wt%催化剂样品制造的剩余MEA由于其过电位的大值而不遵守塔菲尔方程。采用Hirschenhofer方程和Tafel方程对电池中催化剂电极的性能进行了模拟，前者的模拟电压与实验电压的吻合程度优于后者。
This study investigated the performance of membrane electrode assembly (MEA) fabricated with various loadings of platinum catalyst on carbon nanotubes (CNTs) and sulfonated membrane at constant conditions of duration, temperature and pressure. The fabricated MEA was tested in a single proton exchange membrane (PEM) fuel cell unit using hydrogen and oxygen as fuel and oxidant gases respectively. The results obtained show that the performance of the MEA in the cell improves with increase in loading of the catalyst on the electrodes. The results obtained on kinetics of the fuel cell indicate that the MEA samples fabricated with 30 and 40 wt% Pt catalyst electrodes conform to the Tafel equation whereas the remaining MEA fabricated with 10 and 20 wt% catalyst samples do not obey the Tafel equation due to large values of their overpotential. Hirschenhofer and Tafel equations were used to model the performance of the catalyst electrodes in the cell and the simulated voltage obtained from the former showed better conformity with the experimental voltage than the latter.