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Non-noble-metal electrocatalysts for oxygen evolution reaction toward seawater splitting: A review

ChemPhysMater 2023年第3期2卷 185-196页

作者： Zhengguang Qin Wenxian Liu Wenbin Que Jinxiu Feng Wenhui Shi Fangfang Wu Xiehong Cao College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Center for Membrane and Water Science&Technology College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

The direct electrolytic splitting of abundant seawater instead of scarce freshwater is an ideal strategy for producing clean and renewable hydrogen(H 2)fuels.The oxygen evolution reaction(OER)is a vital half-reaction that occurs during electrochemical seawater splitting.However,OER suffers from sluggish four-electron transfer kinetics and competitive chlorine evolution reactions in seawater.Noble metal-based catalysts such as IrO_(2) and RuO_(2) are considered to have state-of-the-art OER electrocatalytic activity,but the low reserves and high prices of these noble metals significantly limit their large-scale application.Recently,efforts have been made to explore efficient,robust,and anti-chlorine-corrosion non-noble-metal OER electrocatalysts for seawater splitting such as oxides,hydroxides,phosphides,nitrides,chalcogenides,alloys,and composites.An in-depth understanding of the fundamentals of seawater electrolysis and the design principle of electrode materials is important for promoting seawater-splitting technology.In this review,we first introduce fundamental reactions in seawater electrolytes.Subsequently,construction strategies for OER electrocatalysts for seawater splitting are introduced.Finally,present challenges and perspectives regarding non-noble-metal OER electrocatalysts for commercial H 2 production by seawater splitting are discussed.

关键词： Non-noble metals OER electrocatalyst Seawater splitting chlorine evolution reactions

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