In this study, we designed and fabricated a Z-scheme Cu_0.5Cd_0.5S/MoO_3-x (CMO) heterojunction with localized surface plasmon resonance (LSPR) effect for efficient photocatalytic hydrogen evolution. The oxygen vacancies (OVs) in MoO_3-x induced Schottky-barrier-free LSPR for the generation of hot electrons. The architecture of transition-metal-substituted solid solution (Cu_0.5Cd_0.5S, CCS) downshifted the conduction band (CB) of CdS from −0.45 eV to −0.38 eV and upshifted the valence band (VB) from 1.65 eV to 1.54 eV, respectively, weakening the interface barrier of the hot electrons transition from MoO_3-x to CCS and enhancing the Coulomb interaction between the electrons of MoO_3-x and the holes of CCS. Benefiting from the cooperation between Z-scheme heterojunction and LSPR effect, the hydrogen evolution rate (HER) of the optimized CMO was 19.28 mmol·g⁻¹·h⁻¹ under visible light with an apparent quantum yield (AQY) of 10.8 % at 420 nm, which was 3.0 and 1.4 times that of the CCS and CCS/MoO₃. Moreover, the HER of CMO still reached 43.57 μmol·g⁻¹·h⁻¹ at 600 nm. This work paved a new path for efficient photocatalysts H₂ evolution by coupling Z-scheme heterojunction and non-noble-metal LSPR effect.

在这项研究中，我们设计并制造了具有局域表面等离子体共振（LSPR）效应的Z型Cu _0.5 Cd _0.5 S/MoO _3-x (CMO)异质结，以实现高效的光催化析氢。_{MoO 3-x}中的氧空位 (OV)诱导肖特基无势垒局域表面等离子体共振 (LSPR) 产生热电子。_{过渡金属取代固溶体（Cu 0.5} Cd _0.5 S，CCS）的结构将CdS的导带（CB）从-0.45 eV下移至-0.38 eV，并将价带（VB）从1.65 eV上移至1.54 eV分别减弱了热电子从MoO _3-x跃迁到CCS的界面势垒，增强了MoO _3-x电子与CCS空穴之间的库仑相互作用。得益于Z型异质结和局域表面等离子体共振效应的协同作用，优化后的CMO在可见光下的析氢速率(HER)为19.28 mmol·g −1 ·h −1，表观量子产率(AQY)为^10.8 % ^。 420 nm，分别是CCS和CCS/MoO ₃的3.0和1.4倍。此外，CMO在600 nm处的HER仍达到43.57 μmol·g ^-1 ·h ^-1。该工作通过耦合Z型异质结和非贵金属LSPR效应，为高效光催化剂H _{2演化开辟了新途径。}