Through a simple solvothermal method, the bimetallic sulfide nanomaterial (Ni–Mo–S) was successfully grown on the surface of CeO₂ to restrain the severe photogenerated electron–hole recombination of CeO₂. The presence of a close contact interface between the 0D metal sulfide particles and the 2D CeO₂ sheet is conducive to charge transfer. Meanwhile, the introduction of Ni–Mo–S nanoparticles on 2D CeO₂ can accelerate surface electron mobility, which could obviously inhibit the combination of electrons and holes. Also, there are many unsaturation sites of metal sulfide introduced on the surface and low hydrogen evolution overpotential, which can serve as active sites for hydrogen evolution. In addition, the 2D structure of CeO₂ can provide a support framework for the 0D Ni–Mo–S particles, thereby greatly reducing the recombination of useful electrons and holes. All of these advantages of photocatalysts discussed above make for the enhancement of photocatalyst catalytic performance, which equal to about 66 times compared with pure CeO₂. Besides, a series of research tests were carried out from different angles to support the relevant results and proposed possible reaction mechanisms.

Graphic Abstract

中文翻译：

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分级生长的 Ni-Mo-S 改性二维 CeO2 用于高效光催化析氢

通过简单的溶剂热法时，双金属硫化物纳米材料（镍-钼- S）成功生长的CeO的表面上₂抑制的CeO的严重光生电子-空穴重组₂。0D金属硫化物颗粒和2D CeO ₂片之间的紧密接触界面的存在有利于电荷转移。同时，在二维CeO ₂上引入Ni-Mo-S纳米颗粒可以加速表面电子迁移，这可以明显抑制电子和空穴的结合。此外，表面引入了许多金属硫化物的不饱和位点，析氢过电位低，可作为析氢的活性位点。此外，CeO 的二维结构₂可以为 0D Ni-Mo-S 粒子提供支撑框架，从而大大减少有用电子和空穴的复合。以上讨论的光催化剂的所有这些优点都使得光催化剂的催化性能提高，与纯CeO ₂相比约等于66倍。此外，还从不同角度进行了一系列研究测试，以支持相关结果并提出可能的反应机制。

图形摘要