Hierarchical TiO2/Fe2O3 heterojunction photoanode for improved photoelectrochemical water oxidation

被引：45
作者：
Deng, Jiujun [1 ]
Zhuo, Qiqi [2 ]
Lv, Xiaoxin [3 ]
机构：
[1] Jiangsu Univ, Inst Energy Res, 301 Xuefu Rd, Zhanjiang 212013, Peoples R China
[2] Jiangsu Univ Sci & Technol, Coll Mat Sci & Engn, 2 Meng Xi Rd, Zhenjiang 212003, Peoples R China
[3] Jiangsu Univ, Automot Engn Res Inst, 301 Xuefu Rd, Zhenjiang 212013, Peoples R China
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2019年 / 835卷
基金：
中国国家自然科学基金;
关键词：
TiO2/Fe2O3; Heterojunction; Photoanode; Photoelectrochemical; Water splitting; HEMATITE NANOSTRUCTURES; OXIDE; LAYER; TIO2; NANOCOMPOSITES; COCATALYST;
D O I：
10.1016/j.jelechem.2019.01.056
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A 3D hierarchical TiO2/Fe2O3 heterojunction photoanode with an improved photoelectrochemical (PEC) water splitting performance was successfully prepared by introducing a titanium nitride (TiN) underlayer through electrophoretic deposition route. Compared to that of pristine Fe2O3 photoanode, the photocurrent density of TiO2/Fe2O3 heterojunction at 1.23 V vs. reversible hydrogen electrode (RHE) increased by more than 2.1 times and achieved to 1.79 mA cm(-2). According to X-ray photoelectron Spectrometer (XPS) and electrochemical impedance spectra (EIS) results, the improved PEC water oxidation performance of TiO2/Fe2O3 photoanode can be attributed to the promoted charge separation and transfer due to the construction of 3D hierarchical heterostructure. This work provides a facile strategy to enhance PEC water splitting performance of hematite, which may help for designing efficient hematite photoanodes for practical applications.
引用
收藏
页码：287 / 292
页数：6
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