电化学水分解被认为是一种很有前途的能量转换和储存方法.探索低成本、高效和稳定的电催化剂,对实现电化学水分解规模化应用、形成可持续化学发展具有重要意义.以非贵金属原子(Fe,Ni和Co等)为中心金属的单原子催化剂由于具有高的原子利用效率、独特的催化活性和选择性,以及廉价易得等优势,受到人们的广泛关注.目前,以非贵金属作为析氧反应的催化剂在合成、表征和机理研究方面还处于起步阶段.在此,首先综述了近年来非贵金属单原子催化剂在合成策略、表征技术及其在析氧反应中的应用等方面的研究进展,接着重点介绍了非贵金属单原子与载体之间的相互作用对设计和制备高活性和稳定性单原子催化剂的重要性,最后讨论了该领域发展所面临的挑战和未来机遇.
Electrochemical water splitting is a promising approach for energy conversion and storage.The exploration of low-cost,efficient,and durable electrocatalysts is of great significance for realizing a large-scale application and forming a sustainable chemistry development.Single-atom catalysts(SACs)with non-precious metal atoms(Fe,Co,Mo,etc.)as active sites have received increasing attention owing to their high atomic utilization efficiency,exotic catalytic activity,selectivity and low-cost.Currently,research on non-precious SACs as oxygen evolution reaction(OER)catalysts is in the infant stage for synthesis,characterization and mechanism studies.Herein,we review the recent investigations and advances in non-precious SACs for synthetic strategies,characterization techniques and the OER application.The importance of the interaction between the single-atom metal and the support for the design and preparation of highly stable SACs as well as the improvement of electrocatalytic activity are also discussed in this context.Finally,the current challenges and future opportunities for the development of this field are discussed.