文献类型：期刊文献

英文题名：Accelerating Catalyst Reconstruction via Silver Sulfide Doping: A Dual-Anion Shielding Strategy for Robust Seawater Electrolysis

作者：Zhang, Ying[1];Li, Shiyi[1];Guan, Zeyu[1];Lei, Linfeng[1,2,3];Zhuang, Linzhou[1,2];Xu, Zhi[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[3]Suzhou Lab, Suzhou 215000, Peoples R China

年份：2025

卷号：21

期号：48

外文期刊名：SMALL

收录：;EI(收录号：20254319373878);WOS:【SCI-EXPANDED(收录号:WOS:001594379900001)】；

基金：Y.Z. and S.L. contributed equally to this work. The authors gratefully ac-knowledge the research funding provided by the National Natural Science Foundation of China (Grant Nos. 22378119 and 22208092), and Shanghai Pilot Program for Basic Research (Grant No. 22TQ1400100-4).

语种：英文

外文关键词：corrosion resistance; dual-barrier; rapid reconstruction; seawater electrolysis; silver sulfide Doping

摘要：The slow electrochemical reconstruction of conventional nickel-based catalysts in alkaline seawater electrolysis creates a critical vulnerability window, leading to irreversible chloride corrosion before a protective oxyhydroxide phase can form. Overcoming this kinetic barrier is paramount for developing durable anodes. In this study, an Ag doping and surface sulfurization strategy that directly confronts this challenge by enabling the ultrafast reconstruction of a NiCo-based hydroxide catalyst (Ag2S-NiCo(OH)x) is introduced. This process is complete in approximate to 2.2 h, effectively closing the window for corrosion and rapidly establishing a robust, active phase. The fully reconstructed catalyst exhibits exceptional performance, delivering an industrial current density of 500 mA cm-2 at an overpotential of 357 mV in alkaline simulated seawater. Its remarkable durability, evidenced by stable operation for over 110 h at 500 A cm-2, is attributed to a novel dual-barrier protection mechanism. Abundant oxygen vacancies, induced during the rapid activation, serve to anchor in situ generated SO4 2- anions. These anions, in synergy with an enriched surface OH- layer, create a powerful electrostatic shield that repels chloride ions. This work demonstrates that kinetically accelerating catalyst reconstruction is a powerful strategy to bypass intrinsic material vulnerabilities, offering a new paradigm for designing robust catalysts for practical seawater oxidation.