Chinese Journal of Catalysis ›› 2026, Vol. 89: 258-268.DOI: 10.1016/S1872-2067(26)65049-8

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Interfacial Cu‒S bond and localized surface plasmon resonance modulated Cu3P@Cu/Mn0.3Cd0.7S S-scheme heterojunction for efficient photocatalytic hydrogen evolution

Ruiqi Zhanga,1, Xintong Yaoa,1, Junchang Liua, Zhi Chenb, Dafeng Zhanga, Xipeng Pua,*()   

  1. aSchool of Materials Science and Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, Shandong, China
    bCollege of Materials and Chemistry, China Jiliang University, Hangzhou 310018, Zhejiang, China
  • Received:2025-10-21 Accepted:2025-12-04 Online:2026-10-18 Published:2026-09-01
  • Contact: *E-mail:xipengpu@hotmail.com(X. Pu).
  • About author:

    1 Contributed equally to this work.

  • Supported by:
    Shandong Provincial Natural Science Foundation, China(ZR2022ME179)

Abstract:

Photocatalytic hydrogen evolution is an economically viable and environmentally friendly synthesis method. However, its photocatalytic efficiency is hindered by the sluggish reaction kinetics and rapid recombination of photogenerated charge carriers. Herein, an interfacial Cu‒S bond and localized surface plasmon resonance (LSPR)-synchronously mediated Cu3P@Cu/Mn0.3Cd0.7S (Cu3P@Cu/MCS) S-scheme heterojunction was designed and synthesized for accelerated photogenerated electron transfer. Under light illumination, the optimized 5%-Cu3P@Cu/MCS composite exhibited a photocatalytic hydrogen production rate of 93.25 mmol g-1 h-1, representing a 7.3-fold increase compared to that of pristine MCS (12.69 mmol g-1 h-1). Experimental results revealed that the interfacial Cu‒S bonds between MCS and Cu3P@Cu accelerated charge separation, thereby enhancing the reaction kinetics. Simultaneously, Cu-induced LSPR converted long-wavelength photons into localized heat, thereby increasing the interfacial temperature and accelerating the transfer of charge carriers. The synergistic effect of this chemical bond established in the S-scheme heterojunction with the LSPR effect provides new insights into photocatalytic H2 evolution.

Key words: S-scheme heterojunction, Interface Cu-S bond, Localized surface plasmon resonance, Photocatalytic hydrogen evolution