Ding Hui, Liu Hongfei, Chu Wangsheng, Wu Changzheng, Xie Yi
Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China.
Chem Rev. 2021 Nov 10;121(21):13174-13212. doi: 10.1021/acs.chemrev.1c00234. Epub 2021 Sep 15.
Electrochemical water splitting for hydrogen generation is a promising pathway for renewable energy conversion and storage. One of the most important issues for efficient water splitting is to develop cost-effective and highly efficient electrocatalysts to drive sluggish oxygen-evolution reaction (OER) at the anode side. Notably, structural transformation such as surface oxidation of metals or metal nonoxide compounds and surface amorphization of some metal oxides during OER have attracted growing attention in recent years. The investigation of structural transformation in OER will contribute to the in-depth understanding of accurate catalytic mechanisms and will finally benefit the rational design of catalytic materials with high activity. In this Review, we provide an overview of heterogeneous materials with obvious structural transformation during OER electrocatalysis. To gain insight into the essence of structural transformation, we summarize the driving forces and critical factors that affect the transformation process. In addition, advanced techniques that are used to probe chemical states and atomic structures of transformed surfaces are also introduced. We then discuss the structure of active species and the relationship between catalytic performance and structural properties of transformed materials. Finally, the challenges and prospects of heterogeneous OER electrocatalysis are presented.
用于制氢的电化学水分解是可再生能源转换和存储的一条很有前景的途径。高效水分解最重要的问题之一是开发具有成本效益且高效的电催化剂，以驱动阳极侧缓慢的析氧反应（OER）。值得注意的是，近年来，诸如金属或金属非氧化物化合物的表面氧化以及某些金属氧化物在OER过程中的表面非晶化等结构转变受到了越来越多的关注。对OER中结构转变的研究将有助于深入理解精确的催化机制，并最终有利于合理设计具有高活性的催化材料。在本综述中，我们概述了在OER电催化过程中具有明显结构转变的多相材料。为了深入了解结构转变的本质，我们总结了影响转变过程的驱动力和关键因素。此外，还介绍了用于探测转变表面化学状态和原子结构的先进技术。然后，我们讨论了活性物种的结构以及转变材料的催化性能与结构性质之间的关系。最后，介绍了多相OER电催化面临的挑战和前景。
