MoC quantum dots are dispersed in a carbon film by the temperature-programmed method. The hybrid catalyst is obtained by the mixed solution method, and the hybrid catalyst is optimized by adjusting the content of CeO₂ to obtain the composite catalyst 15%-COMCC with the best photocatalytic hydrogen evolution activity. SEM and TEM show that there is an intimate interface contact between CeO₂ and MoC-QDs/C, which provides the basis for smooth electron transfer. It is proved by XPS that there is a strong interaction force between the catalysts, which provides a evidence for electron transfer between semiconductors. It is proved by electrochemistry that the introduction of CeO₂ can effectively reduce the hydrogen evolution potential and provide powerful conditions for the hydrogen production of the hybrid catalyst. The carbon film has excellent conductivity, can effectively suppresses the recombination of photo-generated carriers, and accelerate the separation of carriers between the interfaces. MoC quantum dots with high dispersibility embedded in the carbon film provide a lot of active sites for photocatalytic hydrogen production. This research provides an effective strategy for the application of ultra-thin carbon film in photocatalytic hydrogen evolution, the loading of quantum dots, and the design and synthesis of non-noble metals.

MoC 量子点通过程序升温方法分散在碳膜中。采用混合溶液法得到混合催化剂，通过调节CeO ₂含量优化混合催化剂，得到光催化析氢活性最好的复合催化剂15%-COMCC。SEM 和TEM 表明CeO ₂和MoC-QDs/C之间存在密切的界面接触，这为电子的顺利转移提供了基础。XPS证明催化剂之间存在很强的相互作用力，为半导体之间的电子转移提供了证据。电化学证明，CeO ₂的引入可以有效降低析氢电位，为混合催化剂的产氢提供有力的条件。碳膜具有优良的导电性，能有效抑制光生载流子的复合，加速界面间载流子的分离。嵌入碳膜中的具有高分散性的 MoC 量子点为光催化制氢提供了许多活性位点。该研究为超薄碳膜在光催化析氢、量子点的负载以及非贵金属的设计与合成中的应用提供了有效的策略。