1D/0D WO3/CdS heterojunction photoanodes modified with dual co-catalysts for efficient photoelectrochemical water splitting

被引：123

作者：

Li, Yanting ^{[1
]}

Liu, Zhifeng ^{[1
,2
]}

Zhang, Jing ^{[1
]}

Guo, Zhengang ^{[1
]}

Xin, Ying ^{[1
]}

Zhao, Lei ^{[3
]}

机构：

[1] Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

[2] Tianjin Key Lab Bldg Green Funct Mat, Tianjin 300384, Peoples R China

[3] Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453003, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 790卷

关键词：

WO3; photoanode; Heterojunction; Dual layer co-catalyst; Photoelectrochemical water splitting; BIVO4; PHOTOANODES; EPITAXIAL-GROWTH; OXYGEN VACANCIES; CO-PI; WO3; EVOLUTION; CDS; OXIDATION; PERFORMANCE; CATALYST;

D O I：

10.1016/j.jallcom.2019.03.178

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：

The semiconductor photoelectrodes with sufficient light absorption, efficient photogenerated carrier separation and fast transport is crucial for photoelectrochemical (PEC) water splitting. Herein, we firstly report the 1D/0D WO3/CdS heterojunction photoanodes modified with dual co-catalysts NiOOH and Co-Pi to realize efficient water splitting. In this quaternary photoanode, the heterojunctions restrain the recombination of photo-generated electron-hole pairs and CdS acts as a light absorber for sufficient light absorption. Besides, the amorphous dual-layer co-catalyst NiOOH (the hole storage layer) and Co-Pi (hole transfer layer) can collect and delivery the holes to the Helmholtz layer, respectively. The photoanode yields 6.4 times improved photocurrent density (2.59 mA/cm(2) at 1.0 V vs RHE) in comparison with that of bare WO3 and a 300 mV negatively shifts in onset potential. Moreover, it exhibits high efficiency and persistent stability. These results reveal that heterojunctions and the synergetic effect of the dual-layer co-catalyst could effectively improve the performance for water splitting. Especially, it provides a superior way to design photoelectrodes towards PEC application. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：493 / 501

页数：9

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