Fuel starvation can occur and cause damage to the cell when proton exchange membrane fuel cells operate under complex working conditions.In this case,carbon corrosion occurs.Oxygen evolution reaction(OER)catalysts can alleviate carbon corrosion by introducing water electrolysis at a lower potential at the anode in fuel shortage.The mixture of hydrogen oxidation reaction(HOR)and unsupported OER catalyst not only reduces the electrolysis efficiency,but also influences the initial performance of the fuel cell.Herein,Ti4O7 supported IrOx is synthesized by utilizing the surfactant-assistant method and serves as reversal tolerant components in the anode.When the cell reverse time is less than 100 min,the cell voltage of the MEA added with IrOx/Ti4O7 has almost no attenuation.Besides,the MEA has a longer reversal time(530 min)than IrOx(75 min),showing an excellent reversal tolerance.The results of electron microscopy spectroscopy show that IrOx particles have a good dispersity on the surface of Ti4O7 and IrOx/Ti4O7 particles are uniformly dispersed on the anode catalytic layer.After the stability test,the Ti4O7 support has little decay,demonstrating a high electrochemical stability.IrOx/Ti4O7 with a high dispersity has a great potential to the application on the reversal tolerance anode of the fuel cell.

Yonghuan LI;Wei SONG;Guang JIANG;Yue YANG;Hongmei YU;Zhigang SHAO;Fangwei DUAN;Yingxuan YANG

Fuel Cell System and Engineering Laboratory,Key Laboratory of Fuel Cells and Hybrid Power Sources,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;University of the Chinese Academy of Sciences,Beijing 100039,China;Yimgxuan YANG,State Grid Liaoning Electric Power Research Institute,Shenyang 110055,China;State Grid Liaoning Electric Power Research Institute,Shenyang 110055,China

能源前沿

[1]Yonghuan LI;Wei SONG;Guang JIANG;Yue YANG;Hongmei YU;Zhigang SHAO;Fangwei DUAN;Yingxuan YANG-.Ti4O7 supported IrOx for anode reversal tolerance in proton exchange membrane fuel cell)[J].能源前沿,2022(05):852-861

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