高熵合金FeCoNiCrP的制备和电催化析氧性能

doi:10.11896/cldb.22020109

材料导报

2022, Vol. 36

Issue (14): 22020109-5 https://doi.org/10.11896/cldb.22020109

高熵合金*

高熵合金FeCoNiCrP的制备和电催化析氧性能

潘冶^†, 钟旭^†, 朱银安, 陆韬, 于金

东南大学材料科学与工程学院,南京 211189

Preparation and Electrocatalytic Oxygen Evolution Performances of High-entropy Alloy FeCoNiCrP

PAN Ye^†, ZHONG Xu^†, ZHU Yin'an, LU Tao, YU Jin

School of Materials Science and Engineering, Southeast University, Nanjing 211189, China

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摘要本工作采用机械合金化法制备FeCoNiCrP高熵合金纳米颗粒,将其负载在碳纤维纸上制成电催化剂电极,对合金进行电催化析氧性能测试。以循环伏安法对催化剂进行电化学激活后,FeCoNiCrP催化剂在1 mol/L KOH介质中驱动10 mA/cm²的电流密度所需过电位仅为286 mV,而激活前的催化剂所需的过电位为301 mV。与激活前相比,激活后的催化剂具有更低的塔菲尔斜率(27.6 mV/dec)、更大的双层电容(0.435 mF)以及20 h恒定电位测试下更优异的稳定性。循环伏安法激活导致合金表面发生重构,构建出核壳结构,形成有利于析氧过程的金属氧化物和羟基氧化物,从而有效提升催化剂的析氧性能。

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关键词: 高熵合金机械合金化析氧反应电化学激活

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.

Key words: high-entropy alloy mechanical alloying oxygen evolution reaction electrochemical activation

发布日期: 2022-07-26

ZTFLH:

TB3

基金资助: 国家自然科学基金(51671056);江苏省先进金属材料重点实验室(AMM 2021A02)

通讯作者: panye@seu.edu.cn

作者简介: ^†共同第一作者。
潘冶,东南大学材料科学与工程学院教授、博士、博士研究生导师。主要从事非晶与高熵合金、先进金属材料与组织控制等方面的研究。主持和承担国家级、省部级等科研项目20余项,获授权发明专利20余件,在国内外核心期刊上发表论文160余篇。
钟旭,东南大学材料科学与工程学院硕士研究生,主要从事高熵合金与新型电解水催化剂的研究。2019年6月于江苏南京获得工学学士学位。

引用本文:

潘冶, 钟旭, 朱银安, 陆韬, 于金. 高熵合金FeCoNiCrP的制备和电催化析氧性能[J]. 材料导报, 2022, 36(14): 22020109-5.
PAN Ye, ZHONG Xu, ZHU Yin'an, LU Tao, YU Jin. Preparation and Electrocatalytic Oxygen Evolution Performances of High-entropy Alloy FeCoNiCrP. Materials Reports, 2022, 36(14): 22020109-5.

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http://www.mater-rep.com/CN/10.11896/cldb.22020109 或 http://www.mater-rep.com/CN/Y2022/V36/I14/22020109

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