Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (11): 2406024.doi: 10.3866/PKU.WHXB202406024

Special Issue: Solar fuel preparation

• ARTICLE • Previous Articles     Next Articles

Construction of Electron Bridge and Activation of MoS2 Inert Basal Planes by Ni Doping for Enhancing Photocatalytic Hydrogen Evolution

Qin Hu1, Liuyun Chen1, Xinling Xie1, Zuzeng Qin1, Hongbing Ji1,2, Tongming Su1,*()   

  1. 1 Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
    2 Institute of Green Petroleum Processing and Light Hydrocarbon Conversion, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2024-06-20 Revised:2024-07-20 Accepted:2024-07-22 Published:2024-10-14
  • Contact: Email: sutm@gxu.edu.cn (Tongming Su)
  • Supported by:
    the National Natural Science Foundation of China(22208065); Guangxi Natural Science Foundation(2022GXNSFBA035483); Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology(2023K012); Special Funding for 'Guangxi Bagui Scholars'

Abstract:

Photocatalytic hydrogen production is one of the effective ways to address environmental pollution and energy crises. Herein, Nix-MoS2/ZnIn2S4 heterojunctions were constructed to improve the separation efficiency of photogenerated electrons and holes and increase the number of active sites for hydrogen evolution. According to the catalyst characterization and theoretical calculations, the Ni at the interface between Nix-MoS2 and ZnIn2S4 can act as a bridge for charge transfer, the Ni―S bond is the active site for H2O dissociation, and the S site near the S vacancy on the Nix-MoS2 surface enhances the hydrogen evolution reaction. Benefiting from the synergistic effect of the S vacancy and the Ni-doped MoS2 cocatalyst, the optimal Ni0.08-MoS2/ZnIn2S4 exhibited the best hydrogen production rate of 7.13 mmol∙h−1∙g−1, which is 12.08 times than that of ZnIn2S4. This work provides a new strategy for enhancing photocatalytic efficiency through the synergistic effect of surface vacancies and doping and the optimization of heterojunctions.

Key words: Photocatalytic, Hydrogen, ZnIn2S4, MoS2, Doping