二氧化碳（CO2）是主要的大气环境温室气体之一，对人类未来的生存环境和地球的生态系统造成严重危害, 因此如何有效消减及转化大气中的CO2是当今环境领域的重大课题。本申请项目以提高CO2温室气体分子光助催化转化效率为研究目标，通过在分子水平上构建MFe2O4/Bio-Enzyme (M=Ca, Mg, etc.; BE=CODH, FDH, etc.)偶合仿生催化材料，促进光生载流子的分离效率与迁移速率，从而实现CO2催化活化与还原转化效率的进一步提高。拟采用同位素标记分子探针技术结合多种原位在线谱学手段深入研究有关反应机理，从分子水平上理解体系中的光致电荷行为，揭示CO2分子在催化剂表面-界面的吸附、活化、还原及脱附微观过程机制。本项目的实施将深化人们对温室气体CO2分子在复杂反应条件下酶促光催化还原特性的认识，对CO2温室气体的消减控制和资源化利用具有重要的参考价值与现实意义。

Carbon dioxide (CO2) is one of the main greenhouse gases in global environment, which can cause serious harm to the future environment for human survival and the Earth's ecosystem. Thus, how to effectively reduce or convert the atmospheric CO2 is a very important subject in the current academic field of environment science. The submitted proposal aims at improving photocatalytic conversion efficiency of the greenhouse gas molecules CO2 by building MFe2O4 /Bio-Enzyme (M = Ca, Mg, etc.; BE = CODH, FDH, etc.) coupling biomimic catalytic material at the molecular level to promote the separation and migration of photogenerated carriers, in order to achieve further enhanced efficiency of photocatalytic activation and reduction of CO2. Furthermore, isotope-labeled probe technology with a variety of online spectral means will be employed to comprehensively study the reaction mechanisms at the molecular level to understand the microscopic mechanisms of photo-induced charges behavior in the catalytic system, and the processes of adsorption, activation, reduction and desorption of CO2 molecules at the catalyst surface or interface. The implementation of this project will provide people with deep insights into the properties of enzymatic and photocatalytic reduction of the CO2 molecule under complex reaction conditions, which has extremely important practical significance and reference value for abatement, control and resource utilization of CO2, the greenhouse gas.