Photoanode of LDH catalyst decorated semiconductor heterojunction of BiVO4/CdS to enhance PEC water splitting efficiency

被引：55

作者：

Bai, Shouli ^{[1
]}

Li, Qiangqiang ^{[1
]}

Han, Jingyi ^{[1
]}

Yang, Xiaojun ^{[1
]}

Shu, Xin ^{[1
]}

Sun, Jianhua ^{[2
,3
]}

Sun, Lixia ^{[2
]}

Luo, Ruixian ^{[1
]}

Li, Dianqing ^{[1
]}

Chen, Aifan ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing Key Lab Environmentally Harmful Chem Anal, Beijing 100029, Peoples R China

[2] Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China

[3] Guangxi Univ, Ctr Nanoenergy Res, Sch Phys Sci & Technol, Nanning 530004, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2019年 / 44卷 / 45期

基金：

中国国家自然科学基金;

关键词：

Photoelectrochemical water; splitting; BiVO4; CdS; Semiconductor heterojunction; NiCo-LDH co-catalyst; CHARGE SEPARATION; COBALT-PHOSPHATE; NANOWIRE ARRAYS; CO-PI; COMPOSITE; COCATALYSTS; CDS; PHOTOELECTRODES; PHOTOCATALYST; NANOPARTICLES;

D O I：

10.1016/j.ijhydene.2019.07.214

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：

BiVO4 is an ideal photoanode material for solar-driven photoelectrochemical (PEC) water splitting but it easily suffers from the recombination of photogenerated electrons and holes due to its low carrier mobility thus cause low efficiency of PEC water splitting. Herein, the BiVO4/CdS/NiCo-LDH photoanode was prepared by combining methods of metal organic decomposition, chemical and electrodeposition. The photoanode photocurrent density reaches 2.72 mA cm(-2) at 1.23 V (vs. RHE), which is 3.6 folds of pure BiVO4 photoanode and onset potential shifts 450 mV toward cathodic. The incident photon-to-electron conversion efficiency (IPCE) value is 2.86 folds of BiVO4, the calculated photon-to-current efficiency (ABPE) is 1.24% at 0.62 V (vs. RHE). The obtained results are higher than that of most BiVO(4 )based photoanodes published so far. The enhancement benefits from increase of visible light absorption capacity, enhancement of separation efficiency of photoexcited electron-hole and fast transfer of holes accumulated on electrode/electrolyte surface for water oxidation, which has been confirmed by calculating carrier density and carrier transport rate. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：24642 / 24652

页数：11

共 48 条

[1] Solar Water Splitting by TiO2/CdS/Co-Pi Nanowire Array Photoanode Enhanced with Co-Pi as Hole Transfer Relay and CdS as Light Absorber [J].