Zhang Shengqi, Yu Tao, Wen Hui, Ni Zhiyuan, He Yan, Guo Rui, You Junhua, Liu Xuanwen
School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
Chem Commun (Camb). 2020 Dec 21;56(98):15387-15405. doi: 10.1039/d0cc05876a. Epub 2020 Nov 20.
Electrocatalytic water splitting, which is driven by renewable energy input to produce oxygen, has been widely regarded as a promising strategy in the future energy portfolio. The two-dimensional structure based on CoOOH nanosheets is easy to handle in the preparation process, low in cost, and has a small overpotential during water decomposition. Therefore, CoOOH two-dimensional materials have been widely used as electrocatalysts for the oxygen evolution reaction (OER). In this paper, we summarize the application of two-dimensional CoOOH nanosheets in the field of oxygen production from electrocatalytic water splitting. First, the different preparation methods of two-dimensional CoOOH nanosheets are briefly introduced. The structure-activity relationship of the two-dimensional CoOOH catalyst was analyzed from different viewpoints, such as doping, defects, etc. Finally, different catalytic mechanisms of CoOOH-based catalysts are discussed, and studies at the density functional theory (DFT) level are also provided to support the above mechanisms. To improve the readability of this review, a concise overview at the end of each section is given to illustrate some of the characteristics and trends of the studies in the corresponding part. The opportunities and challenges of two-dimensional CoOOH as an electrocatalyst in the future are summarized in the Conclusion section. This work will provide new insights and perspectives to the readers to understand the role of CoOOH nanosheets in the OER process.
电催化水分解由可再生能源输入驱动以产生氧气，已被广泛视为未来能源组合中有前景的策略。基于氢氧化钴（CoOOH）纳米片的二维结构在制备过程中易于处理、成本低且在水分解过程中过电位小。因此，CoOOH二维材料已被广泛用作析氧反应（OER）的电催化剂。在本文中，我们总结了二维CoOOH纳米片在电催化水分解制氧领域的应用。首先，简要介绍了二维CoOOH纳米片的不同制备方法。从掺杂、缺陷等不同角度分析了二维CoOOH催化剂的结构-活性关系。最后，讨论了基于CoOOH的催化剂的不同催化机制，并提供了密度泛函理论（DFT）水平的研究以支持上述机制。为提高本综述的可读性，在每部分结尾给出简要概述，以说明相应部分研究的一些特点和趋势。结论部分总结了二维CoOOH作为电催化剂在未来的机遇和挑战。这项工作将为读者理解CoOOH纳米片在OER过程中的作用提供新的见解和观点。
