期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 38, 期 34, 页码 14451-14457出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.09.064
关键词
W incorporated FeVO4 film; Narrow band gap; Photoanode; Photoelectrochemical water oxidation; n-Type doping
资金
- KRICT project program
Herein, we report the preparation, characterization and investigation of previously unexplored W incorporated iron vanadate (FeVO4) electrodes for solar light driven water oxidation in photoelectrochemical cell. The W incorporated FeVO4 films on F-doped SnO2 substrates have been prepared by layer-by-layer deposition of metal organic precursor and subsequent thermal decomposition at 550 degrees C in air. The synthesized films with a band gap of about 2.06 eV are responsive to visible light up to wavelength of similar to 600 nm, i.e. being able to harvest similar to 45% of the solar spectrum. The W incorporated FeVO4 photoanodes are active materials for photoelectrochemical water oxidation and, yield a significantly enhanced (2.5 fold higher) photocurrent in comparison to pristine FeVO4 photoanodes. This improvement can be attributed to increased n-type conductivity by W6+ ion doping in the FeVO4 lattice. The incident photon to current conversion efficiency achieved with developed photoanodes is as high as 6.5% at 400 nm. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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