Polyphenol-metal coordination derived high-entropy alloy as bifunctional oxygen electrocatalyst for Zn-air batteries

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-01-09 DOI:10.1007/s12598-024-03065-1

Meng-Di Hao, Qin Li, Jing-Han Sun, Deng Liu, Hua-Long Yu, Rui Liu

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Abstract

High-entropy alloy (HEA) nanoparticles (NPs) have attracted great attention in electrocatalysis due to their tailorable complex compositions and unique properties. Herein, we introduce Fe, Co, Ni, Cr and Mn into the metal-polyphenol coordination system to prepare HEA NPs enclosed in N-doped carbon (FeCoNiCrMn) with great potential for catalyzing oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The unique high-entropy structural characteristics in FeCoNiCrMn facilitate effective interplay between metal species, leading to improved ORR (E_1/2 = 0.89 V) and OER (η = 330 mV, j = 10 mA·cm⁻²) activity. Additionally, FeCoNiCrMn exhibits excellent open-circuit voltage (1.523 V), power density (110 mW·cm⁻²) and long-term durability, outperforming Pt/C + IrO₂ electrodes as a cathode catalyst in Zn-air batteries (ZABs). Such polyphenol-assisted alloying method broadens and simplifies the development of HEA electrocatalysts for high-performance ZABs.

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多酚金属配位衍生的高熵合金作为锌空气电池双功能氧电催化剂

高熵合金（HEA）纳米粒子以其独特的性能和复杂的组成在电催化领域引起了广泛的关注。本文将Fe、Co、Ni、Cr和Mn引入到金属-多酚配位体系中，制备了包裹在n掺杂碳（FeCoNiCrMn）中的HEA NPs，该NPs具有催化氧还原反应（ORR）和析氧反应（OER）的潜力。FeCoNiCrMn独特的高熵结构特性促进了金属之间的有效相互作用，提高了ORR （E1/2 = 0.89 V）和OER （η = 330 mV, j = 10 mA·cm−2）活性。此外，FeCoNiCrMn具有优异的开路电压（1.523 V）、功率密度（110 mW·cm−2）和长期耐用性，优于Pt/C + IrO2电极作为锌空气电池（ZABs）的阴极催化剂。这种多酚辅助合金化方法拓宽和简化了高性能ZABs HEA电催化剂的开发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.