Superior photoelectrochemical activity of self-assembled NiWO4-WO3 heteroepitaxy

被引：38

作者：

Thi Hien Do ^{[1
,2
]}

Chien Nguyen Van ^{[2
]}

Tsai, Kai-An ^{[2
]}

Le Thi Quynh ^{[2
]}

Chen, Jhih-Wei ^{[3
]}

Lin, Yan-Cheng ^{[4
]}

Chen, Yi-Chun ^{[3
]}

Chou, Wu-Ching ^{[4
]}

Wu, Chun-Lin ^{[3
]}

Hsu, Yung-Jung ^{[2
]}

Chu, Ying-Hao ^{[1
,2
,4
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[2] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan

[3] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

[4] Natl Chiao Tung Univ, Dept Electrophys, Hsinchu 30010, Taiwan

来源：

NANO ENERGY | 2016年 / 23卷

关键词：

Self-assembled; Nanocomposites; Epitaxial nickel tungstate; Water splitting; Photoelectrochemical; Heteroepitaxy; PHOTOCATALYTIC ACTIVITY; PHASE; FILMS; MAGNETORESISTANCE; DEGRADATION; INTERFACES;

D O I：

10.1016/j.nanoen.2016.03.021

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：

Self-assembled nanocomposites with a high interface-to-volume ratio offer tremendous opportunities of tailoring functionalities by a proper combination of components. In this study, we report the first fabrication of self-assembled NiWO4-WO3 heteroepitaxy and its excellent performance on photoel-ectrochemical water splitting. The heteroepitaxy is evidenced by a combination of x-ray diffraction and transmission electron microscopy. The energy band diagram of NiWO4-WO3 heterostructure probed by x-ray photoelectron spectroscopy suggests an efficient charge separation at their interface by injecting photo -generated electrons from NiWO4 to WO3 and holes from WO3 to NiWO4. Therefore, a great improvement in the photoelectrochemical activity of self -assembled NiWO4-WO3 heteroepitaxy was achieved (1400 mu A cm(-2) at 0.7 V vs. Ag/AgCl). This work delivers a new category of composite materials for promising photoelectrode in photoelectrochemical cells. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：153 / 160

页数：8

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