Electrodeposited Fe2TiO5 nanostructures for photoelectrochemical oxidation of water

被引：21

作者：

Lin, Yan-Gu ^{[1
]}

Hsu, Yu-Kuei ^{[2
]}

Lin, Yu-Chang ^{[1
,3
]}

Chen, Ying-Chu ^{[4
]}

机构：

[1] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[2] Natl Dong Hwa Univ, Dept Optoelect Engn, Hualien 97401, Taiwan

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

[4] Karlsruhe Inst Technol, Inst Anorgan Chem, Engesserstr 15, D-76131 Karlsruhe, Germany

来源：

ELECTROCHIMICA ACTA | 2016年 / 213卷

关键词：

Iron oxide; Titanium doping; Nanostructured film; Photoelectrochemical; HEMATITE; FILMS; ARRAYS;

D O I：

10.1016/j.electacta.2016.07.143

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrodeposition was used to fabricate nanostructured films of Ti-containing hematite for application to the photoelectrochemical (PEC) splitting of water. The morphology and microstructure of Ti-doped hematite were examined with a scanning electron microscope, X-ray diffraction, Raman spectra and X-ray photoelectron spectra. Optical absorption spectra indicated an enhanced light absorbance in Ti-doped hematite. This Ti doping increased the carrier concentration about ten-fold, confirmed with a Mott-Schottky analysis. The prepared Ti-doped hematite showed a photocurrent enhanced four-fold relative to pristine hematite. Synchrotron-based soft X-ray absorption spectra clearly revealed that a local Fe2TiO5 structure in hematite formed a heterojunction, which decreased the accumulation of photogenerated holes and improved the performance. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：898 / 903

页数：6

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