Constructing CoNiRuIrMn high-entropy alloy network for boosting electrocatalytic activity toward alkaline water oxidation

IF 8.3 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Su Yan , Linfeng Zhang , Weimo Li , Ruikai Qi , Mengxiao Zhong , Meijiao Xu , Wei Song , Xiaofeng Lu
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Abstract

Anodic oxygen evolution reaction (OER) is crucial for several clean energy storage and conversion processes, like the rechargeable Zn-air battery and electrocatalytic water splitting. However, constructing advanced OER electrocatalysts with exceptional higher activity and stability compared to commercial IrO2 and RuO2 remains a significant challenge. Herein, a high-entropy alloy material consisting of five metal elements (Co, Ni, Ru, Ir, and Mn) with a 3D porous network structure is reported to be fabricated through a facile and mild one-pot co-reduction method, enabling its excellent electron/mass transport property and the modulated d-band center to optimize the intermediates adsorption in electrocatalysis. Therefore, the resultant CoNiRuIrMn sample exhibits the overpotential of merely 169 mV to deliver 10 mA cm−2 in alkaline environment, greatly lower than that of the commercial electrocatalysts (RuO2 and IrO2). Significantly, the CoNiRuIrMn catalyst demonstrates an ultrahigh mass activity of 376.2 A g−1, which is 110.6- and 63.8-fold greater than those of IrO2 and RuO2 catalysts, respectively. Furthermore, the overall water splitting device assembled with CoNiRuIrMn and Pt/C catalyst presents a much better operation voltage and long-term stability than RuO2||Pt/C and IrO2||Pt/C electrolyzers, showcasing its promising potential for efficient hydrogen production.

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来源期刊
Acta Materialia
Acta Materialia 工程技术-材料科学:综合
CiteScore
16.10
自引率
8.50%
发文量
801
审稿时长
53 days
期刊介绍: Acta Materialia serves as a platform for publishing full-length, original papers and commissioned overviews that contribute to a profound understanding of the correlation between the processing, structure, and properties of inorganic materials. The journal seeks papers with high impact potential or those that significantly propel the field forward. The scope includes the atomic and molecular arrangements, chemical and electronic structures, and microstructure of materials, focusing on their mechanical or functional behavior across all length scales, including nanostructures.
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