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Durable High-Temperature Proton Exchange Membrane Fuel Cells Enabled by the Working-Temperature-Matching Palladium-Hydrogen Buffer Layer |
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| Authors: | Dr Gen Huang Yingying Li Dr Li Tao Dr Zhifeng Huang Dr Zhijie Kong Dr Chao Xie Dr Shiqian Du Dr Tehua Wang Yujie Wu Qie Liu Dongcai Zhang Jiaqi Lin Miaoyu Li Jun Wang Prof Jin Zhang Prof Shanfu Lu Prof Yi Cheng Prof Shuangyin Wang |
| Institution: | 1. State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, Provincial Hunan Key Laboratory for Graphene Materials and Devices, College of Chemistry and Chemical Engineering, the National Supercomputer Centre in Changsha, Hunan University, Changsha, 410082 P. R. China
These authors contributed equally to this work.;2. State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, Provincial Hunan Key Laboratory for Graphene Materials and Devices, College of Chemistry and Chemical Engineering, the National Supercomputer Centre in Changsha, Hunan University, Changsha, 410082 P. R. China;3. Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Space and Environment, Beihang University, Beijing, 100191 P. R. China;4. Department of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083 P. R. China Key Laboratory of Magnetic Molecules and Magnetic Information Materials (Ministry of Education), School of Chemistry and Material Science, Shanxi Normal University, Taiyuan, 030031 P. R. China |
| Abstract: | The durability degradation during stack-operating conditions seriously deteriorates the lifetime and performance of the fuel cell. To alleviate the rapid potential rise and performance degradation, an anode design is proposed to match the working temperature of high-temperature proton exchange membrane fuel cells (HT-PEMFCs) with the release temperature of hydrogen from palladium. The result is significantly enhanced hydrogen oxidation reaction (HOR) activity of Pd and superior performance of the Pd anode. Furthermore, Pd as hydrogen buffer and oxygen absorbent layer in the anode can provide additional in situ hydrogen and absorb infiltrated oxygen during local fuel starvation to maintain HOR and suppress reverse-current degradation. Compared with the traditional Pt/C anode, the Pd/C also greatly improved HT-PEMFCs durability during start-up/shut-down and current mutation. The storage/release of hydrogen provides innovative guidance for improving the durability of PEMFCs. |
| Keywords: | Durability Electrocatalysis Fuel Cell Fuel Starvation Hydrogen Oxidation Reaction |