Amorphous Co-Pi anchored on CdSe/TiO2 nanowire arrays for efficient photoelectrochemical hydrogen production

作者：Cao, Zhou; Yin, Yanling; Yang, Wenjun; Zhao, Gang; Liu, Yahui; Zhou, Yulan; Peng, Yuehua; Wang, Weike; Zhou, Weichang; Tang, Dongsheng^*

来源：Journal of Materials Science, 2019, 54(4): 3284-3293.

DOI：10.1007/s10853-018-3079-5

• TIO2 NANOROD ARRAYS
• WATER
• PHOTOCATALYST
• PHOTOANODES
• CATALYST
• CELLS
• FILMS
• CDS

Photoelectrochemical (PEC) water splitting into hydrogen and oxygen using hybridized semiconductor photoelectrodes has become a promising strategy for converting solar energy into clean and sustainable H-2 fuel. Here, we report a promising hybrid photoanode constructed by electrodepositing an amorphous Co-Pi film onto semiconducting CdSe/TiO2 nanowire arrays for photoelectrochemical hydrogen production. This photoanode exhibits a high water-splitting photocurrent density, which is attributed to the broad visible light absorption and efficient charge carrier separation by the virtue of the type-II heterojunction formed between TiO2 and CdSe. Photoconversion efficiency of Co-Pi/CdSe/TiO2 and CdSe/TiO2 photoanodes increase by 3.3 and 2.1 times, compared with the pristine TiO2 photoanode. Moreover, Co-Pi/CdSe/TiO2 photoelectrode shows greatly improved PEC stability, the drop in photocurrent of Co-Pi/CdSe/TiO2 nanowire arrays photoelectrode is about 10% after 1h illumination, because of the addition of the Co-Pi film protecting the light absorber CdSe/TiO2 from photocorrosion. The enhanced PEC performance mechanism of triple hybrid photoanode is also discussed in this paper.

• 出版日期2019-2
• 单位湖南师范大学