Abstract Constructing heterostructure for efficient charge separation is a hopeful way for enhance photocatalytic hydrogen production. In this paper, we successfully construct the Ni2P/Cd0.5Zn0.5S/Co3O4 (Ni2P/CZS/Co3O4) heterostructure via three-step hydrothermal method. It is demonstrated that Ni2P/CZS/Co3O4 shows a prominent photocatalytic H2 generation activity of 39.66 mmol g−1 h−1, revealing about 2.42 times enhancement compared to that of the pure Cd0.5Zn0.5S (CZS) under visible light. The closely contacted CZS/Co3O4 forms a type-II heterostructure to accelerate the separation of photoinduced charge. The Ni2P acts as electron traps to capture the photoelectrons, and provide active sites for proton reduction. Moreover, the cooperative synergy of type-II heterostructure and active sites achieves an obvious improvement for photocatalytic hydrogen production.

中文翻译：

---

构建Ni2P/Cd0.5Zn0.5S/Co3O4三元异质结构高效光催化制氢

摘要 构建异质结构以实现有效的电荷分离是提高光催化制氢的一种有希望的方法。在本文中，我们通过三步水热法成功构建了 Ni2P/Cd0.5Zn0.5S/Co3O4 (Ni2P/CZS/Co3O4) 异质结构。结果表明，在可见光下，Ni2P/CZS/Co3O4 具有显着的光催化产氢活性，为 39.66 mmol g-1 h-1，与纯 Cd0.5Zn0.5S (CZS) 相比提高了约 2.42 倍。紧密接触的 CZS/Co3O4 形成 II 型异质结构以加速光生电荷的分离。Ni2P 充当电子陷阱以捕获光电子，并为质子还原提供活性位点。而且，