Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (10): 2312010.doi: 10.3866/PKU.WHXB202312010

Special Issue: Solar Fuel Photocatalyst

• ARTICLE • Previous Articles     Next Articles

Synergistic Effect of Cu-Graphdiyne/Transition Bimetallic Tungstate Formed S-Scheme Heterojunction for Enhanced Photocatalytic Hydrogen Evolution

Zhengyu Zhou1, Huiqin Yao2,*(), Youlin Wu1, Teng Li1,3, Noritatsu Tsubaki3,*(), Zhiliang Jin1,*()   

  1. 1 School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, China
    2 Department of Chemistry, College of Basic Medicine, Ningxia Medical University, Yinchuan 750004, China
    3 Department of Applied Chemistry, Graduate School of Engineering, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
  • Received:2023-12-08 Revised:2024-01-08 Accepted:2024-01-08 Published:2024-03-13
  • Contact: Email: yaohq@nxmu.edu.cn (Huiqin Yao)tsubaki@eng.u-toyama.ac.jp (Noritatsu Tsubaki)zl-jin@nun.edu.cn (Zhiliang Jin)
  • Supported by:
    the Ningxia Hui Autonomous Region Natural Science Foundation Project(2023AAC02046)

Abstract:

Cu-Graphdiyne and CoNiWO4 were synthesized by organic and hydrothermal methods, respectively. The establishment of an S-scheme heterojunction between Cu-Graphdiyne and CoNiWO4 was achieved by interface engineering design. The efficient separation and transfer of photogenerated carriers are facilitated by the synergistic effect of the built-in electric field and band bending, while maintaining the strong redox capacity of the catalysts. The introduction of Cu-Graphdiyne effectively enhances the photo absorption capacity and conductivity of the composite catalyst, and significantly suppresses the recombination of photogenerated carriers. The unique two-dimensional planar network structure of Cu-Graphdiyne provides abundant active sites for photocatalytic processes, thereby facilitating the photocatalytic reaction. Density functional theory (DFT) calculations demonstrate that hot electrons generated by surface plasmon resonance effects of Cu will transfer to Graphdiyne to promote hydrogen evolution reaction. This study offers insights into potential applications of Cu-Graphdiyne and nickel-cobalt based catalysts in photocatalytic hydrogen evolution.

Key words: Cu-graphdiyne, S-scheme heterojunction, Interface engineering design, Hydrogen evolution reaction, DFT