Modulating charge centers and vacancies in P-CoNi loaded phosphorus-doped ZnIn2S
4 nanosheets for H2 and H2O2 photosynthesis from pure water

Xue, Fei; Zhang, Chunyang; Peng, Huiping; Sun, Lin; Yan, Xueli; Liu, Feng; Wu, Wentong; Liu, Maochang; Liu, Liangbin; Hu, Zhiwei; Kao, Cheng-Wei; Chan, Ting-Shan; Xu, Yong; Huang, Xiaoqing

doi:10.1016/j.nanoen.2023.108902

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Modulating charge centers and vacancies in P-CoNi loaded phosphorus-doped ZnIn₂S₄ nanosheets for H₂ and H₂O₂ photosynthesis from pure water

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Hu, Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Xue, F., Zhang, C., Peng, H., Sun, L., Yan, X., Liu, F., et al. (2023). Modulating charge centers and vacancies in P-CoNi loaded phosphorus-doped ZnIn₂S₄ nanosheets for H₂ and H₂O₂ photosynthesis from pure water. Nano Energy, 117: 108902, pp. 1-9. doi:10.1016/j.nanoen.2023.108902.

Cite as: https://hdl.handle.net/21.11116/0000-000D-BDCA-B

Abstract

Photocatalytic water splitting has recently attracted increasing interests for solar to chemical energy conversion. Nevertheless, the high-efficiency process for photocatalytic water splitting is driven by recombination of photogenerated electron-hole pairs and the resultant low H2 productivity. Herein, we demonstrate that P-doping induced positive charge centers (Pδ+) and indium vacancies (VIn) in ZnIn2S4 (ZIS) nanosheets can significantly promote photosplitting pure water to simultaneously produce H2 and H2O2. Microstructural and spectroscopic analysis suggest that Pδ+ and VIn can trap photogenerated electrons and holes, respectively, as a result of enhanced separation of electron-hole pairs. The optimal catalyst of P-CoNi/ZIS displays a stoichiometric H2 and H2O2 productivity of 1228.7 and 1105.5 μmol h−1 g−1, respectively, with an apparent quantum efficiency of 6.2% at 365 nm. Impressively, H2 productivity of P-CoNi/ZIS has surpassed most reported catalysts for photocatalytic pure water splitting. This work provides a unique strategy to create efficient photocatalyst for pure water splitting. © 2023