Peng Shaomin, Yang Zhuoying, Sun Ming, Yu Lin, Li Yanguang
Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa, Macau SAR, 999078, China.
Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
Adv Mater. 2023 Nov;35(45):e2304711. doi: 10.1002/adma.202304711. Epub 2023 Sep 29.
Metal halide perovskites (MHPs) are emerging photocatalyst materials that can enable sustainable solar-to-chemical energy conversion by virtue of their broad absorption spectra, effective separation/transport of photogenerated carriers, and solution processability. Although preliminary studies show the excellent photocatalytic activities of MHPs, their intrinsic structural instability due to the low formation energy and soft ionic nature is an open challenge for their practical applications. This review discusses the latest understanding of the stability issue and strategies to overcome this issue for MHP-based photocatalysis. First, the origin of the instability issue at atomic levels and the design rules for robust structures are analyzed and elucidated. This is then followed by presenting several different material design strategies for stability enhancement, including reaction medium modification, material surface protection, structural dimensionality engineering, and chemical composition engineering. Emphases are placed on understanding the effects of these strategies on photocatalytic stability as well as the possible structure-performance correlation. Finally, the possible future research directions for pursuing stable and efficient MHP photocatalysts in order to accelerate their technological maturity on a practical scale are outlined. With that, it is hoped to provide readers a valuable snapshot of this rapidly developing and exciting field.
金属卤化物钙钛矿（MHPs）是新兴的光催化剂材料，凭借其宽广的吸收光谱、光生载流子的有效分离/传输以及溶液可加工性，能够实现可持续的太阳能到化学能的转换。尽管初步研究表明MHPs具有出色的光催化活性，但由于其形成能低和离子性质柔软，其固有的结构不稳定性对其实际应用来说是一个亟待解决的挑战。本综述讨论了对基于MHP的光催化稳定性问题的最新认识以及克服该问题的策略。首先，在原子层面分析并阐明了不稳定性问题的根源以及稳健结构的设计规则。随后介绍了几种不同的增强稳定性的材料设计策略，包括反应介质改性、材料表面保护、结构维度工程和化学成分工程。重点在于理解这些策略对光催化稳定性的影响以及可能的结构-性能相关性。最后，概述了为了在实际规模上加速其技术成熟度而追求稳定高效的MHP光催化剂的未来可能研究方向。借此，希望能为读者提供这个快速发展且令人兴奋的领域的有价值的概况。
