高分散型铜基氧化物的构筑及其光热协同催化甲醇制氢的研究

甲醇水蒸气重整制氢反应具有储氢密度高、氢气产物体积分数大以及副产物少的优点，然而该反应需要在较高的温度下才能完全转化。目前广泛使用的铜基催化剂存在低温条件下催化反应活性低以及在高温条件下活性容易衰减、长期反应稳定性差以及副产物选择性高的问题。基于此，本项目提出光热协同催化策略来实现低温、高效的甲醇重整制氢。采用高分散型铜基前驱体的可控热解衍生方法，通过对不同类型前驱体材料的功能设计以及对热解衍生过程的精细调变，引入光辅助活化效应、高分散活性位点以及多组分之间的协同作用，构筑高分散型的多组分铜基氧化物催化剂，实现低温高效的光热协同催化甲醇水蒸气重整制氢反应。结合多种原位表征技术以及理论计算方法，深入探究并阐明光热协同催化反应机制，为甲醇制氢光热协同催化剂的应用提供理论指导和实践依据，对于高效氢能源催化材料及体系的发展具有重要意义。

Steam reforming of methanol (SRM) has advantages of high mass hydrogen storage density, large hydrogen volume ratio in the products and less by-products. However, high temperature is necessary for complete conversion. The widely used copper-based catalysts has disadvantages such as low activity at low temperature, deactivation, poor long-term stability and high selectivity of by-products at high temperature. Base on the previous problems, this project proposes the idea of photothermal synergistic catalysis strategy to develop a low-temperature and efficient reforming of methanol for hydrogen production. A controlled pyrolysis synthesis strategy with highly dispersed copper-based precursors is used. Utilizing the photo-assisted activation effects, highly dispersed active sites and the synergy effects of different components to construct a highly dispersed multicomponent copper-based oxide catalyst and realize a low-temperature and efficient photothermal catalysis for the hydrogen production from the steam reforming of methanol. Combining various in-situ characterizations and theoretical calculation methods, we intend to reveal the photothermal synergistic mechanisms, and to provide theoretical guidance and practical reference for the practical application of photothermal catalysts for hydrogen production from methanol. This project is of significant to the development of efficient catalytic materials and systems for hydrogen energy.