WO3 nanoneedles/α-Fe2O3/cobalt phosphate composite photoanode for efficient photoelectro chemical water splitting

被引：94

作者：

Jin, Tao ^{[1
]}

Diao, Peng ^{[1
]}

Wu, Qingyong ^{[1
]}

Xu, Di ^{[1
]}

Hu, Dianyi ^{[1
]}

Xie, Yonghong ^{[1
]}

Zhang, Mei ^{[2
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Aerosp Mat & Performance, Beijing 100191, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, State Key Lab Adv Met, Beijing 100083, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2014年 / 148卷

基金：

国家教育部博士点专项基金资助;

关键词：

Photoelectrochemical water splitting; Heterojunction; Oxygen evolution reaction; Tungsten trioxide; Iron trioxide; OXYGEN-EVOLVING CATALYST; LIGHT-DRIVEN; OXIDATION; FILMS; PHOTOOXIDATION; DEPOSITION; CONVERSION; STABILITY; EVOLUTION;

D O I：

10.1016/j.apcatb.2013.10.052

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：

We report the fabrication of the WO3 nanoneedles/alpha-Fe2O3 heterojunction photoanodes for efficient photoelectrochemical water splitting. The high-aspect-ratio single crystalline WO3 nanoneedles (NNs) act as both the photoanode framework and the light harvester in the UV and blue visible region. The porous layer of small alpha-Fe2O3 nanocrystals act as a cooperative light harvester in the visible region. The WO3 NNs/alpha-Fe2O3 heterojunction photoanodes exhibit an extended light absorption band in the visible region and a significantly enhanced photocurrent density, which is ca. 1.6 times higher than that obtained on the pure WO3 NNs. Cobalt phosphate (Co-Pi) was employed as an oxygen evolving catalyst to modify the heterojunction electrode, and the resulting WO3 NNs/alpha-Fe2O3/Co-Pi composite photoanodes show an excellent photostability for oxygen evolution reaction. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：304 / 310

页数：7

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