Efficient carbon dots/NiFe-layered double hydroxide/BiVO4 photoanodes for photoelectrochemical water splitting

被引：68

作者：

Lv, Xiaowei ^{[1
]}

Xiao, Xin ^{[1
]}

Cao, Minglei ^{[1
]}

Bu, Yi ^{[1
]}

Wang, Chuanqing ^{[1
]}

Wang, Mingkui ^{[1
]}

Shen, Yan ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Luoyu Rd 1037, Wuhan 430074, Hubei, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2018年 / 439卷

关键词：

BiVO4; Carbon dots; NiFe-layered double hydroxide; Photoanodes; Photoelectrochemical water splitting; ELECTROCHEMICAL SYNTHESIS; BIVO4; PHOTOANODES; QUANTUM DOTS; ELECTROCATALYST; PERFORMANCE; CONVERSION; NANODOTS; OXIDE;

D O I：

10.1016/j.apsusc.2017.12.182

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Modification of semiconductor photoanodes with oxygen evolution catalyst (OEC) is an effective approach for improving photoelectrochemical (PEC) water splitting efficiency. In the configuration, how to increase the activity of OEC is crucial to further improve PEC performance. Herein, a ternary photoanode system was designed to enhance PEC efficiency of photoelectrodes through introducing carbon dots (CDs), NiFe-layered double hydroxide (NiFe-LDH) nanosheets on BiVO4 particles. Systematic research shows that NiFe-LDH serves as an OEC which accelerates oxygen evolution kinetics, while the introduction of CDs can further reduce charge transfer resistance and overpotential for oxygen evolution. Under the synergistic effect of NiFe-LDH and CDs, the photocurrent and incident photon to current conversion efficiency (IPCE) of the resulting CDs/NiFe-LDH/BiVO4 photoanode is improved significantly than those of the NiFe-LDH/BiVO4 electrode. Consequently, such a ternary heterostructure could be an alternative way to further enhance PEC water splitting performance. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：1065 / 1071

页数：7

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