| HIGH ENTROPY ALLOYS |
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| Preparation and Electrocatalytic Oxygen Evolution Performances of High-entropy Alloy FeCoNiCrP |
| PAN Ye†, ZHONG Xu†, ZHU Yin'an, LU Tao, YU Jin
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| School of Materials Science and Engineering, Southeast University, Nanjing 211189, China |
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Abstract In this work, high-entropy alloy FeCoNiCrP nanoparticles were prepared by mechanical alloying method, and loaded onto carbon fiber paper as working electrode. The electrocatalysis oxygen evolution performance of the alloy was tested. Cyclic voltammetry was utilized to electrochemically activate the catalyst. After cyclic voltammetry activation, the FeCoNiCrP catalyst only requires an overpotential of 286 mV to drive a current density of 10 mA/cm2 in 1 mol/L KOH medium, better than its pristine catalyst. The activated catalyst also has a lower Tafel slope (27.6 mV/dec), a larger double-layer capacitance (0.435 mF) and the more excellent stability under 20 h testing at fixed potential. Cyclic voltammetry activation has an influence on surface morphology, which constructs a core-shell structure and forms metal oxides and hydroxyl oxides that are conducive to the oxygen evolution process, and ultimately enhances the oxygen evolution performance of the catalyst.
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Published:
Online: 2022-07-26
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| Fund:National Natural Science Foundation of China (51671056) and Jiangsu Key Laboratory for Advanced Metallic Materials(AMM 2021A02). |
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2022, Vol. 36 
