Lin Sen, Huang Hongwei, Ma Tianyi, Zhang Yihe
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing 100083 China.
Discipline of Chemistry University of Newcastle Callaghan NSW 2308 Australia.
Adv Sci (Weinh). 2020 Nov 18;8(1):2002458. doi: 10.1002/advs.202002458. eCollection 2020 Jan.
Photocatalytic water splitting has attracted a lot of attention in recent years, and O evolution is the decisive step owing to the complex four-electrons reaction process. Though many studies have been conducted, it is necessary to systematically summarize and introduce the research on photocatalytic O evolution, and thus a systematic review is needed. First, the corresponding principles about O evolution and some urgently encountered issues based on the fundamentals of photocatalytic water splitting are introduced. Then, several types of classical water oxidation photocatalysts, including TiO, BiVO, WO, -FeO, and some newly developed ones, such as Sillén-Aurivillius perovskites, porphyrins, metal-organic frameworks, etc., are highlighted in detail, in terms of their crystal structures, synthetic approaches, and morphologies. Third, diverse strategies for O evolution activity improvement via enhancing photoabsorption and charge separation are presented, including the cocatalysts loading, heterojunction construction, doping and vacancy formation, and other strategies. Finally, the key challenges and future prospects with regard to photocatalytic O evolution are proposed. The purpose of this review is to provide a timely summary and guideline for the future research works for O evolution.
近年来，光催化水分解备受关注，由于其复杂的四电子反应过程，析氧反应是决定性步骤。尽管已经开展了许多研究，但有必要系统地总结和介绍光催化析氧的研究情况，因此需要进行系统综述。首先，基于光催化水分解的基本原理，介绍析氧反应的相应原理以及一些亟待解决的问题。然后，详细重点介绍了几种经典的水氧化光催化剂，包括TiO、BiVO、WO、 -FeO，以及一些新开发的光催化剂，如席勒 - 奥里维利乌斯钙钛矿、卟啉、金属有机框架等，涉及它们的晶体结构、合成方法和形貌。第三，介绍了通过增强光吸收和电荷分离来提高析氧活性的多种策略，包括负载助催化剂、构建异质结、掺杂和形成空位以及其他策略。最后，提出了光催化析氧面临的关键挑战和未来前景。本综述旨在为析氧反应的未来研究工作提供及时的总结和指导。
