气候变化领域集成服务门户(CCPortal): In situ structural evolution of the multi-site alloy electrocatalyst to manipulate the intermediate for enhanced water oxidation reaction

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DOI	10.1039/d0ee00755b
	In situ structural evolution of the multi-site alloy electrocatalyst to manipulate the intermediate for enhanced water oxidation reaction
	Wang B.; Zhao K.; Yu Z.; Sun C.; Wang Z.; Feng N.; Mai L.; Wang Y.; Xia Y.
发表日期	2020
ISSN	17545692
起始页码	2200
结束页码	2208
卷号	13 期号:7
英文摘要	Investigating the reaction mechanism and the rational design of highly efficient electrocatalysts for the oxygen evolution reaction play a key role in renewable energy applications. Here, we report a homogeneous multi-metal-site oxyhydroxide electrocatalyst (consisting of Fe doped NiOOH and Cu doped NiOOH) obtained by in situ electrochemical dealloying of the multi-metal-site alloy (consisting of FeNi3 and NiCu alloys). The in situ structural evolution process manipulates the intermediate and enhances the water oxidation performance. After dealloying, the electrochemically dealloyed catalyst exhibits a small overpotential at large current density (250 mV at 100 mA cm-2), low Tafel slope (34 mV dec-1), remarkably increased ECSA (8-fold larger than before), and superior durability for 200 h at 100 mA cm-2. This electrocatalyst presents one of the best performances among all reported transition metal-based electrocatalysts, and is even superior to the benchmark RuO2. Operando ATR FT-IR reveals that the electrochemically dealloyed electrocatalyst could manipulate the reaction path based on direct O2 evolution mechanism (DOEM) and facilitate the formation of O-O bonds. This fundamental understanding will contribute to the identification and design of the active structure of oxygen evolution electrocatalysts. © 2020 The Royal Society of Chemistry.
英文关键词	Binary alloys; Dealloying; Electrocatalysts; Electrolysis; Oxygen; Oxygen evolution reaction; Ruthenium compounds; Transition metals; Active structures; Large current density; Oxygen evolution; Rational design; Reaction mechanism; Renewable energy applications; Structural evolution; Water oxidation; Reaction intermediates; alloy; catalysis; catalyst; concentration (composition); electrochemistry; oxidation; performance assessment
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189615
作者单位	Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, IChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, China; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, State Key Laboratory of Silicate Materials for Architectures, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China; NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan, 430070, China
推荐引用方式 GB/T 7714	Wang B.,Zhao K.,Yu Z.,et al. In situ structural evolution of the multi-site alloy electrocatalyst to manipulate the intermediate for enhanced water oxidation reaction[J],2020,13(7).
APA	Wang B..,Zhao K..,Yu Z..,Sun C..,Wang Z..,...&Xia Y..(2020).In situ structural evolution of the multi-site alloy electrocatalyst to manipulate the intermediate for enhanced water oxidation reaction.Energy & Environmental Science,13(7).
MLA	Wang B.,et al."In situ structural evolution of the multi-site alloy electrocatalyst to manipulate the intermediate for enhanced water oxidation reaction".Energy & Environmental Science 13.7(2020).