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Recent advances in suppressing the photocorrosion of cuprous oxide for photocatalytic and photoelectrochemical energy conversion
Journal of Photochemistry and Photobiology C: Photochemistry Reviews ( IF 13.6 ) Pub Date : 2018-10-22 , DOI: 10.1016/j.jphotochemrev.2018.10.001
Cui Ying Toe , Jason Scott , Rose Amal , Yun Hau Ng

The emergence of cuprous oxide (Cu2O) as a visible light active semiconductor for photocatalytic and photoelectrochemical applications has elevated significantly over the past decade. With photocorrosion identified as a severe issue for Cu2O, its photoactivity has been greatly restricted. Given that Cu2O redox potentials are located in between its band gap, the possible occurrence of self-photoreduction or self-oxidation upon illumination is inevitable. Various efforts have been directed to implement effective strategies in enhancing the photostability of Cu2O. In particular, most of the studies focused on improving the charge transfer from Cu2O to reactants or co-catalyst to avoid accumulation of charge within the particles. This review presents recent research progresses for the development of strategies to suppress Cu2O photocorrosion in regards to its intrinsic properties and charge kinetics. It is shown that effective transport of electrons or holes out of Cu2O photocatalyst by engineering its crystal structure, tuning its reaction environment or depositing secondary elements could effectively inhibit Cu2O from experiencing self-photodecomposition. Understanding of the charge dynamics with respect to its photocorrosion is pivotal to optimize the design of Cu2O photocatalyst for enhanced performance in the future.



中文翻译:

抑制氧化亚铜用于光催化和光电化学能量转化的光腐蚀方面的最新进展

在过去的十年中,氧化亚铜(Cu 2 O)作为可见光活性半导体用于光催化和光电化学应用的出现显着增加。由于光腐蚀被认为是Cu 2 O的严重问题,其光活性受到了极大的限制。由于Cu 2 O氧化还原电势位于其带隙之间,因此不可避免地会在照明时发生自光还原或自氧化。各种努力的方向,以实现提高铜的光稳定性的有效策略2 O.尤其是,大多数研究侧重于提高从铜的电荷转移2O为反应物或助催化剂,以避免电荷在颗粒内积聚。本文就Cu 2 O的内在特性和电荷动力学方面,提出了抑制Cu 2 O光腐蚀的策略的最新研究进展。研究表明,通过改变晶体结构,调整反应环境或沉积次级元素,可以有效地将电子或空穴从Cu 2 O光催化剂中运出,可以有效抑制Cu 2 O发生自光分解。了解有关其光腐蚀的电荷动力学对于优化Cu 2 O光催化剂的设计以提高未来的性能至关重要。

更新日期:2018-10-22
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