用于光电化学水分解的光电极氧空位调节综述

Review of Oxygen Vacancy Regulation in Photoelectrodes for Photoelectrochemical Water Splitting

光电化学(PEC)分解水制氢是一项有望取代化石燃料的绿色能源生产策略.传统光电极由于其光生载流子的快速复合和缓慢的动力学会导致水分解性能不佳.在电极材料中注入氧空位可调节光电极的电子和光学性质,从而有助于光电极中固有缺陷的形成.已有研究表明,将氧空位引入光电极是增强其PEC分解水性能的有效方法.对于不同类型的半导体光电极材料,介绍了通过氢气还原、等离子体处理和过氧化氢处理引入氧空位的方法以及氧空位影响光电极PEC性能的研究进展.总结了基于新的表征技术对氧空位的深入理解和新的发现,并对光电极氧空位调节策略及应用研究进行了展望.

Photoelectrochemical(PEC)water splitting to produce hydrogen is a green energy production strategy that is expected to replace fossil fuels.Conventional photoelectrodes could lead to poor performance of water splitting due to their fast recombination and slow kinetics of photogenerated carriers.Injecting oxygen vacancies into the electrode materials can regulate the electronic and optical properties of the photoelectrodes,thus contributing to the formation of inherent defects in the photoelectrodes.It has been shown that introducing oxygen vacancies into photoelectrodes is an effective method to enhance the water splitting performance of PEC.For different types of semiconductor photoelectrode materials,the methods of introducing oxygen vacancies through hydrogen reduction,plasma treatment and hydrogen peroxide treatment,and the research progress of the effect of oxygen vacancies on the performance of photoelectrodes PEC were introduced.The in-depth understanding and new discoveries of oxygen vacancies based on new characterization techniques were summarized,and the strategies and applications of oxygen vacancies regulation in photoelectrodes were prospeced.