Efficient solar-to-hydrogen photoelectrodes need harvest sunlight to capacity and improve the separation efficiency of charge carriers for chemical reactions in water. Herein, we demonstrate the merits of type-II heterostructures with component controllable quaternary shells (ZnxCd1−xSeyTe1−y) and the surface plasmon resonance of Au nanoparticles to satisfy photocatalytic requirements. Our ZnO/ZnxCd1−xSeyTe1−y/Au nanostructures display a broad absorption edge from UV to NIR (Near Infrared) and high charge separation efficiency. The finite element method simulation and UV-vis-NIR diffuse reflectance spectroscopy confirm the enhanced absorption of visible light. Furthermore, these ZnO/ZnxCd1−xSeyTe1−y/Au heterostructures show remarkable hydrogen-production ability from water, suggesting a type of photocatalytic paradigm for H2 production.

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