标題: A stable oxygen evolution splitting electrocatalysts high entropy alloy FeCoNiMnMo in simulated seawater

作者: Li, P (Li, Peng); Yao, YP (Yao, Yuanpeng); Ouyang, WE (Ouyang, Wengen); Liu, Z (Liu, Ze); Yin, HY (Yin, Huayi); Wang, DH (Wang, Dihua)

來源出版物: JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 卷: 138 頁: 29-35 DOI: 10.1016/j.jmst.2022.08.012 出版年: MAR 1 2023

摘要: Stabilizing anode for oxygen evolution (OER) in chlorine-containing electrolytes is a significant challenge. Adding corrosion inhibitors in electrolytes can alleviate this problem, but the type and dosage of corrosion inhibitors need a lot of exploration, and side reactions may occur to reduce current efficiency. Herein, we prepared a FeCoNiMnMo High entropy alloy (HEA) electrode for OER in simulated seawater without corrosion inhibitors. It exhibits great electrocatalytic activity (overpotential ( eta) = 237 mV at 10 mA cm -2 ) and excellent stability (200 h at 100 mA cm -2 ). Experiments and Density Functional Theory (DFT) calculation show that the protective layer containing K 2 MoO 4 is the crucial factor for chlorine resistance of FeCoNiMnMo electrode. The tightly adsorbed state of Cl - and K 2 MoO 4 ensures that other oxides are not corroded. And the externally added K 2 MoO 4 cannot protect the electrode. In addition, the high-entropy effect of HEA reduces the dissolution of the alloy. This work provides an efficient way to prepare a noble-free HEA catalyst that can stabilize oxygen evolution in corrosive electrolytes. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

作者關鍵詞: High entropy alloy; Oxygen evolution reaction; Corrosion inhibitor; Chlorine resistance

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

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

[Yao, Yuanpeng; Ouyang, Wengen; Liu, Ze] Wuhan Univ, Sch Civil Engn, Dept Engn Mech, Wuhan 430072, Peoples R China.

通訊作者地址: Wang, DH (通訊作者)，Wuhan Univ, Int Cooperat Base Sustainable Utilizat Resources &, Wuhan 430072, Peoples R China.

Wang, DH (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

電子郵件地址: wangdh@whu.edu.cn

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