期刊
APPLIED SURFACE SCIENCE
卷 464, 期 -, 页码 544-551出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2018.09.118
关键词
Inverse opal; Light absorber; Co-catalyst; Photoanode
类别
资金
- National Natural Science Foundation of China [51772255]
- Natural Science Foundation of Hunan Province [2016JJ3123]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13093]
The search for highly efficient, stable and cost-effective photoanode materials for the photoelectrochemical solar water splitting process has attracted much attention over the past decades. In this work, we synthesized a TiO2 inverse opal composite photoelectrode that was sensitized with BiVO(4 )as light absorber and was further integrated with a cobalt-phosphate (Co-Pi) co-catalyst to boost the kinetics of surface water oxidation reaction. The prepared TiO2/BiVO4/Co-Pi electrode exhibited both improved visible light absorption and a more efficient charge transfer relay for solar driven water splitting. The optimized TiO2/BiVO4/Co-Pi photoanode yielded a photocurrent density of similar to 4.96 mA/cm(2 )at 0.63 V versus Ag/AgCl, leading to a photo-to-energy conversion efficiency that was 9.0 times better than TiO2 inverse opals and 2.3 times better than the TiO2/BiVO4 photoanode. This current work provides a strategy for the design other integrated photoelecreodes that will combine light absorber and co-catalyst for more efficient photoelectrochemical water splitting applications.
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