Chen Zongkun, Fan Qiqi, Zhou Jian, Wang Xingkun, Huang Minghua, Jiang Heqing, Cölfen Helmut
University of Konstanz, Universitätsstraße 10, 78457, Konstanz, Germany.
Current address: Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470, Mülheim an der, Ruhr, Germany.
Angew Chem Int Ed Engl. 2023 Dec 18;62(51):e202309293. doi: 10.1002/anie.202309293. Epub 2023 Sep 25.
Developing efficient and affordable electrocatalysts for the sluggish oxygen evolution reaction (OER) remains a significant barrier that needs to be overcome for the practical applications of hydrogen production via water electrolysis, transforming CO to value-added chemicals, and metal-air batteries. Recently, hydroxides have shown promise as electrocatalysts for OER. In situ or operando techniques are particularly indispensable for monitoring the key intermediates together with understanding the reaction process, which is extremely important for revealing the formation/OER catalytic mechanism of hydroxides and preparing cost-effective electrocatalysts for OER. However, there is a lack of comprehensive discussion on the current status and challenges of studying these mechanisms using in situ or operando techniques, which hinders our ability to identify and address the obstacles present in this field. This review offers an overview of in situ or operando techniques, outlining their capabilities, advantages, and disadvantages. Recent findings related to the formation mechanism and OER catalytic mechanism of hydroxides revealed by in situ or operando techniques are also discussed in detail. Additionally, some current challenges in this field are concluded and appropriate solution strategies are provided.
开发高效且经济实惠的电催化剂以应对缓慢的析氧反应（OER），仍然是通过水电解制氢、将一氧化碳转化为高附加值化学品以及金属空气电池实际应用中需要克服的重大障碍。最近，氢氧化物作为OER的电催化剂已展现出潜力。原位或 operando 技术对于监测关键中间体以及理解反应过程尤为不可或缺，这对于揭示氢氧化物的形成/OER催化机理以及制备具有成本效益的OER电催化剂极为重要。然而，对于使用原位或 operando 技术研究这些机理的现状和挑战缺乏全面讨论，这阻碍了我们识别和解决该领域存在的障碍的能力。本综述概述了原位或 operando 技术，概述了它们的能力、优点和缺点。还详细讨论了通过原位或 operando 技术揭示的与氢氧化物形成机理和OER催化机理相关的最新发现。此外，总结了该领域当前的一些挑战并提供了适当的解决策略。
