Preparation and Electrocatalytic Oxygen Evolution Performance of a Novel Porous MnNiCoCrFe High-entropy Alloy as Electrocatalytic Electrode Material

被引：0
|
作者：
Li H. [1 ,2 ,3 ]
Mu J. [1 ]
Wang Y. [2 ,3 ]
Ge S. [2 ,3 ]
Liu C. [1 ]
Zhang H. [1 ,2 ,3 ]
Zhu Z. [2 ,3 ]
机构：
[1] School of Materials Science and Engineering, Northeastern University, Shenyang
[2] Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang
[3] CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2023年 / 37卷 / 05期
基金：
中国国家自然科学基金;
关键词：
electrocatalysts; high-entropy alloy; metallic materials; oxygen evolution; porous structure;
D O I：
10.11901/1005.3093.2022.135
中图分类号：
学科分类号：
摘要：
A novel three-dimensional porous self-supporting electrode material for electrochemical catalytic oxygen evolution were prepared by chemical etching method from a bulk high-entropy alloy Mn50Fe12.5Co12.5Ni12.5Cr12.5. The electrochemical test results show that the overpotential of the prepared electrode material is only 281 mV at the current of 10 mA·cm-2 and the Tafel slope is 63 mV/dec in an alkaline solution of 1 mol/L KOH, which is better than that of commercial RuO2. At the same time, the working voltage does not increase significantly after continuous operation for 50 h at the current density of 50 mA·cm-2, which reflects the excellent stability during electrocatalytic oxygen evolution process of the Mn-rich high-entropy porous alloy as electrocatalytic electrode material. The Nyquist plots show that the free-standing structure of the bulk HEA catalyst has outstanding electron transfer ability compared with the ordinary supported catalyst. © 2023 Chinese Journal of Materials Research. All rights reserved.
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页码：332 / 340
页数：8
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