Citation: LI Ming-Xue, HAN Kui, LI Yan. Effect and Mechanism of Co-catalyst Co-Pi Impregnation by Light Assisted Electrodeposition on Solar Water Splitting Properties of Ta₃N₅ Photoanodes[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(3): 441-449. doi: 10.11862/CJIC.2016.053 shu

Effect and Mechanism of Co-catalyst Co-Pi Impregnation by Light Assisted Electrodeposition on Solar Water Splitting Properties of Ta₃N₅ Photoanodes

College of Science, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

Corresponding author: LI Ming-Xue, lmx_cumt@126.com
Received Date: 15 October 2015
Revised Date: 6 December 2015

Figures(9)

Co-Pi is a cheap and high efficient co-catalyst for water splitting. The impregnation method of co-catalyst is very important for water splitting property of photoanode. Therefore, in this work, for Ta₃N₅ photoanode, a series of studies about co-catalyst Co-Pi impregnation by light assisted electrodeposition have been developed. The results suggest that the incident light intensity during the Co-Pi impregnation process has little effect on the water splitting property, while the loading potential and the loading charge have great influence on the water splitting property of Ta₃N₅. In addition, the transfer of carriers on Ta₃N₅/electrolyte interface has been studied by electrochemical impedance spectroscopy test and simulation. The results suggest that the photo-generated carriers transfer can be efficiently regulated by controlling the loading potential and loading charge during the impregnation process to improve the water splitting property of Ta₃N₅. More importantly, the best loading potential of Co-Pi keeps almost unchanged for Ta₃N₅ with different roughness, while the best loading charge has positive correlation with the surface roughness of the phtoanode, therefore, the loading charge should be adjusted by the roughness of photoanode.
- solar water splitting,
- Ta₃N₅,
- Co-Pi,
- light assisted electrodeposition
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Effect and Mechanism of Co-catalyst Co-Pi Impregnation by Light Assisted Electrodeposition on Solar Water Splitting Properties of Ta3N5 Photoanodes

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通讯作者: 陈斌, bchen63@163.com

Effect and Mechanism of Co-catalyst Co-Pi Impregnation by Light Assisted Electrodeposition on Solar Water Splitting Properties of Ta₃N₅ Photoanodes