Hexagonal CdS and layered double hydroxides are the hot materials for photocatalytic hydrogen evolution reaction due to their unique structure and excellent performance. Here, CdS/NiCo LDH catalyst with S-scheme heterogeneous is successfully prepared by the method of electrostatic self-assembly. Compared with CdS, the hydrogen evolution performance over the appropriate CdS/NiCo LDH is increased by 3.6 times. This is because the tight coupling of the contact interface between CdS and NiCo LDH and the matching of the band gap structure improve the transmission efficiency of photogenerated electrons. Ultraviolet–visible and photoluminescence experiments have proved that the separation efficiency of electrons and holes, the light absorption intensity and the charge lifetime of the composite catalyst have been greatly improved. Additional series of characterization prove the possible S-scheme heterojunction mechanism of CdS/NiCo LDH photocatalytic hydrogen evolution.

六方硫化镉和层状双氢氧化物由于其独特的结构和优异的性能而成为光催化析氢反应的热门材料。在这里，通过静电自组装的方法成功地制备了 S 型多相 CdS/NiCo LDH 催化剂。与 CdS 相比，在适当的 CdS/NiCo LDH 上析氢性能提高了 3.6 倍。这是因为CdS和NiCo LDH之间接触界面的紧密耦合和带隙结构的匹配提高了光生电子的传输效率。紫外-可见光和光致发光实验证明，复合催化剂的电子和空穴的分离效率、光吸收强度和电荷寿命都有很大提高。