基于光纤布能石墨烯气凝胶原位负载蜂窝状(SC-X)@GA/OF多孔电极的精密构建及CO2光电还原微观协同催化机制

The reduction of CO2 had important significance in energy development and environmental management. In this study, the optical fiber energy-distribution graphene aerogel supported honeycomb (SC-X)@GA/OF electrode (SC: emiconductor; X: doping element; GA: graphene aerogel; OF: optical fiber) porous electrode were precisely constructed by microemulsion template in-situ self-assembly technique. The catalytic efficiency of CO2 was improved due to the all-around energy-distribution property of optical fiber, the high electric conductivity and diffusion absorption property of graphene aerogel as well as the gas collection, light concentrating and high electron conduction performance of honeycomb porous structure, the doped heterojunction effect, the optical fiber energy-distribution effect and the microsynergic catalytic effect. Moreover, the synergy mechanism was discussed, and the structure-function relationship was optimized. The study was focused on the relationship between the preparation technology, structure and performance of electrode. The precise design and construction of microstructure such as phase, atom and electron of electrode surface and interface, were investigated. The interaction mechanism and control between electrode surface and interface characters (such as microstructure and chemical composition) and environment were studied. In addition, the optical fiber screening and layout, the selective activation, reduction path and kinetic process of reactants were also investigated to find out the electrode materials with high activity and excellent performance for repeated use. The researches provided theoretical basis and technology foundation to explore the preparation of such electrode materials, the control of surface and interface behavior, the microsynergistic catalytic mechanism and their practical application in gas phase catalysis

光电催化CO2还原在能源开发与环境治理方面具有重要意义。本课题利用微乳液模板原位自组装技术精密构建光纤布能石墨烯气凝胶原位负载蜂窝状(SC-X)@GA/OF多孔电极(SC:半导体;X:掺杂元素;GA:石墨烯气凝胶;OF:光纤)。利用光纤全方位布能特性，石墨烯气凝胶高导电率与高扩散吸附特性，蜂窝状多孔的集气聚光与高电子传导性、结合异质表界面效应、光纤布能效应、微观协同催化效应、提高CO2还原效率，阐述催化机制和优化构效关系。本课题重点研究电极制备工艺与其结构、性能的关系；研究电极表界面物相、原子电子等微纳结构的精密构建、表界面特性与环境相互作用机制及调控，光纤筛选与布置，反应物选择活化、还原路径及动力学过程，寻找高活性和优异重复使用性能的电极材料。本课题研究将为探索此类电极材料制备、表界面行为调控与微观协同催化机制及其在气相催化领域的实际应用提供理论依据和奠定技术基础。