Photocharged Fe2TiO5/Fe2O3 Photoanode for Enhanced Photoelectrochemical Water Oxidation

被引：24

作者：

Deng, Jiujun ^{[1
]}

Lv, Xiaoxin ^{[2
]}

Zhong, Jun ^{[3
]}

机构：

[1] Jiangsu Univ, Inst Energy Res, 301 Xuefu Rd, Zhenjiang 212013, Peoples R China

[2] Jiangsu Univ, Automot Engn Res Inst, 301 Xuefu Rd, Zhenjiang 212013, Peoples R China

[3] Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat Lab FUNSOM, Suzhou 215123, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 51期

基金：

中国国家自然科学基金;

关键词：

OXYGEN EVOLUTION; IRON-OXIDE; HEMATITE NANOSTRUCTURES; BIVO4; PHOTOANODES; LAYER; ALPHA-FE2O3; SURFACES;

D O I：

10.1021/acs.jpcc.8b08826

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：

Photocharging is a novel and effective photo anode treatment for improving the photoelectrochemical water splitting performance. Here, a photocharged Fe2TiO5/Fe2O3 photoanode was prepared with a significantly increased photocurrent density. Furthermore, the photocharging effect could also be deactivated via a discharging treatment under dark conditions. By using X-ray absorption spectroscopy and electrochemical impedance spectroscopy, the photocharging effect was revealed to be attributed to the formation of Fe(IV) intermediates at the interface to accelerate the water oxidation kinetics. The results offer a detailed understanding on the mechanism of the photocharging effect in hematite, which may help in the design of highly efficient water splitting catalysts.

引用

页码：29268 / 29273

页数：6

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