The expansion of the optical response range and the high photoelectron holes separation and the transfer efficiency are prerequisites for the excellent hydrogen evolution performance of the catalyst. In this paper, amorphous CoSx is combined with rare-earth complex LaMnO3 and under the characterization of SEM, TEM, XRD and XPS, the successful synthesis of the composite catalyst was demonstrated; characterization results by UV–Vis, BET and electrochemical workstations show that the composite material exposes more active sites, and the close contact interface formed between the two effectively improves the separation and transmission of photogenerated carriers, and the ability of the composite material to sense light is also significantly enhanced. After optimizing the hydrogen production conditions of the composite catalyst, the hydrogen production under visible light (≥ 420 nm) for 5 h reached 458.8 μmol, which was about 6.8 and 4.5 times that of pure LaMnO3 and CoSx, and the hydrogen evolution stability of the material is very good. Studies have shown that amorphous CoSx is a good material that can replace precious metals for hydrogen production.

中文翻译：

---

无定形CoSx改性LaMnO3光催化分解水产氢

光学响应范围的扩大以及高光电子空穴分离和转移效率是催化剂优异析氢性能的先决条件。本文将无定形CoSx与稀土配合物LaMnO3结合，在SEM、TEM、XRD和XPS表征下，证明了复合催化剂的成功合成；UV-Vis、BET和电化学工作站的表征结果表明，复合材料暴露出更多的活性位点，两者之间形成的紧密接触界面有效提高了光生载流子的分离和传输，提高了复合材料对光的感知能力也得到了显着的提升。优化复合催化剂制氢条件后，可见光（≥420 nm）5 h产氢量达到458.8 μmol，约为纯LaMnO3和CoSx的6.8倍和4.5倍，材料析氢稳定性非常好。研究表明，无定形CoSx是一种很好的材料，可以替代贵金属制氢。