标题: Highly Stable Single-Phase FeCoNiMnX (X = Cr, Mo, W) High-Entropy Alloy Catalysts with Submicrometer Size for Efficient Oxygen Evolution

作者: Li, P (Li, Peng); Wu, BZ (Wu, Bozhao); Du, KF (Du, Kaifa); Liu, Z (Liu, Ze); Gao, EL (Gao, Enlai); Yin, HY (Yin, Huayi); Wang, DH (Wang, Dihua)

来源出版物: ACS SUSTAINABLE CHEMISTRY & ENGINEERING  卷: 11  期: 38  页: 14246-14254  DOI: 10.1021/acssuschemeng.3c04499  提前访问日期: SEP 2023   出版年: SEP 12 2023  

摘要: The activity and stability of oxygen evolution reaction (OER) catalysts are often trade-offs and are both size dependent. Theoretical calculations have predicted that some noble-metal-free high-entropy alloys (HEAs) are promising OER catalysts. However, their catalytic properties have not been proven because of the lack of a facile method to synthesize small-sized homogeneous HEA particles. Here, submicrometer-sized singlephase FeCoNiMnW HEA particles were prepared by electrochemical metallization in 900 s (at 900 degrees C). FeCoNiMnW shows the best OER activity (? = 355 mV at 500 mA cm(-2)) and durability of the three HEAs because the large total density of states of FeCoNiMnW accelerates the electrons' transport speed for OER. More importantly, the single-phase FeCoNiMnW continuously operated for 50 days at 500 mA cm(-2) with an almost unchanged overpotential. Overall, this work offers a rapid and simple method to prepare various effective and long-lasting single-phase HEA catalysts with controllable sizes and enhanced OER performances. KEYWORDS: HEA, particle size, FeCoNiMnW, high current density, OER

作者关键词: HEA; particle size; FeCoNiMnW; highcurrent density; OER

地址: [Li, Peng; Du, Kaifa; Yin, Huayi; Wang, Dihua] Wuhan Univ, Int Cooperat Base Sustainable Utilizat Resources, Wuhan 430072, Hubei, Peoples R China.

[Li, Peng; Du, Kaifa; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

[Li, Peng] North Univ China, Sch Energy & Power Engn, Taiyuan 030051, Shanxi, Peoples R China.

[Wu, Bozhao; Liu, Ze; Gao, Enlai] Wuhan Univ, Sch Civil Engn, Dept Engn Mech, Wuhan 430072, Hubei, Peoples R China.

通讯作者地址: Yin, HY; Wang, DH (通讯作者)，Wuhan Univ, Int Cooperat Base Sustainable Utilizat Resources, Wuhan 430072, Hubei, Peoples R China.

Yin, HY; Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址: yinhuayi@whu.edu.cn; wangdh@whu.edu.cn

影响因子：8.4