Zhou Xiangyang, Ji Hao, Li Bing, Zhang Cunman
Clean Energy Automotive Engineering Center and School of Automotive Studies, Tongji University, Shanghai 201804, China.
ACS Omega. 2020 Apr 21;5(17):10099-10105. doi: 10.1021/acsomega.0c00638. eCollection 2020 May 5.
Hydrogen starvation of the proton-exchange membrane fuel cell can result in high positive anode potentials followed by cell voltage reversal, which causes water electrolysis and carbon corrosion. A common material-based method is to adopt water electrolysis catalysts to promote water electrolysis over carbon corrosion. While, the membrane electrode assembly shows poor-repetitive reversal performance as the fuel starvation tests are repeated in the previous studies. Herein, IrO/RuO nanocomposites are prepared by a modified Adams method and characterized by physical and electrochemical measurement. Then, the as-prepared IrO/RuO is used as an oxygen evolution reaction catalyst in reversal tolerant anodes, and the results exhibit an unexpected repetitive reversal tolerant performance with the voltage reversal times become longer as the increase of fuel starvation tests.
质子交换膜燃料电池的氢饥饿会导致阳极电位大幅正向升高，随后电池电压反转，这会引发水电解和碳腐蚀。一种常见的基于材料的方法是采用水电解催化剂来促进水电解而非碳腐蚀。然而，在先前的研究中，当重复进行燃料饥饿测试时，膜电极组件表现出较差的重复反转性能。在此，通过改进的亚当斯方法制备了IrO/RuO纳米复合材料，并通过物理和电化学测量对其进行了表征。然后，将制备好的IrO/RuO用作耐反转阳极中的析氧反应催化剂，结果显示出意想不到的重复耐反转性能，随着燃料饥饿测试次数的增加，电压反转时间变长。
