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Vol. 8 No. 1 (2016)

Recent Advances in Visible-Light-Driven Photoelectrochemical Water Splitting: Catalyst Nanostructures and Reaction Systems

https://doi.org/10.1007/s40820-015-0063-3
Xiaoping Chen
Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
Zhixiang Zhang
Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
Lina Chi
Faculty of Engineering and the Environment, University of Southampton, Highfield, Southampton SO17 1BJ, UK
Aathira Krishnadas Nair
Faculty of Engineering and the Environment, University of Southampton, Highfield, Southampton SO17 1BJ, UK
Wenfeng Shangguan
Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
Zheng Jiang
Faculty of Engineering and the Environment, University of Southampton, Highfield, Southampton SO17 1BJ, UK

Corresponding Author: Zheng Jiang

Z.Jiang@soton.ac.uk

Nano-Micro Letters, Vol. 8 No. 1 (2016), Article Number: 1-12

Abstract

Photoelectrochemical (PEC) water splitting using solar energy has attracted great attention for generation of renewable hydrogen with less carbon footprint, while there are enormous challenges that still remain for improving solar energy water splitting efficiency, due to limited light harvesting, energy loss associated to fast recombination of photogenerated charge carriers, as well as electrode degradation. This overview focuses on the recent development about catalyst nanomaterials and nanostructures in different PEC water splitting systems. As photoanode, Au nanoparticle-decorated TiO2 nanowire electrodes exhibited enhanced photoactivity in both the UV and the visible regions due to surface plasmon resonance of Au and showed the largest photocurrent generation of up to 710 nm. Pt/CdS/CGSe electrodes were developed as photocathode. With the role of p–n heterojunction, the photoelectrode showed high stability and evolved hydrogen continuously for more than 10 days. Further, in the Z-scheme system (Bi2S3/TNA as photoanode and Pt/SiPVC as photocathode at the same time), a self-bias (open-circuit voltage V oc = 0.766 V) was formed between two photoelectrodes, which could facilitate photogenerated charge transfers and enhance the photoelectrochemical performance, and which might provide new hints for PEC water splitting. Meanwhile, the existing problems and prospective solutions have also been reviewed.

Keywords

Photoelectrochemical water splitting Nanostructures Reaction system Heterojuction Hybrid systems
Chen, Xiaoping, Zhixiang Zhang, Lina Chi, Aathira Krishnadas Nair, Wenfeng Shangguan, and Zheng Jiang. 2015. “Recent Advances in Visible-Light-Driven Photoelectrochemical Water Splitting: Catalyst Nanostructures and Reaction Systems”. Nano-Micro Letters 8 (1):1-12. https://doi.org/10.1007/s40820-015-0063-3.
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