Research progress of fabrication of ZnO-based photoanode and photoelectrocatalytic water splitting performances

被引：0
作者：
Fu S. [1 ]
Zhang Q. [2 ]
Lu J. [2 ]
Ma Z. [2 ]
机构：
[1] School of Bailie Mechanical Engineering, Lanzhou City University, Lanzhou
[2] Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 03期
关键词：
Catalyst; Nanostructure; Photoelectrocatalysis; Solar energy; Zonc oxide;
D O I：
10.16085/j.issn.1000-6613.2020-0845
中图分类号：
学科分类号：
摘要：
Photoelectrocatalytic(PEC) water splitting offers a promising approach to convert solar energy into hydrogen energy. The photoelectrode, as the core of the PEC water splitting system, determines the photo-conversion efficiency. Among various semiconductors, zinc oxide (ZnO) has attracted much attention owing to its low onset potential, high charge mobility and low cost. However, ZnO possesses a wide band gap, the serious recombination of electron-hole pairs and sluggish kinetics of the oxygen evolution reaction, which greatly restrict their photo-conversion efficiency. In this review, the recent advances in the fabrication of ZnO-based photoanode and its PEC performances were discussed. Firstly, the effect of the morphology and intrinsic defect in ZnO semiconductor on the PEC properties were elaborated. Then, several strategies that can be employed for construction the surface/interface of ZnO-based semiconductors were discussed, including element doping, quantum dot sensitization, noble metal deposition, heterostructure and coupling the cocatalysts. The effects of different strategies on the PEC properties of ZnO-based semiconductors were also discussed. Finally, the future research directions of ZnO-based semiconductors were prospected at five aspects including surface modification of ZnO, constructing the interface of the composite semiconductor at atom level, replacing noble metal Au, Ag and Pt nanoparticles with inexpensive bimetallic or polymetallic nanoparticles, fabrication of the high efficient cocatalyst and introducing interlayers such as hole-storage layers or electron-blocking layers. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：1413 / 1424
页数：11
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