将污染物CO2和H2S与廉价丰富原料CH4共处理一步催化转化合成甲基硫醇反应，是实现CO2和H2S协同转化为增值化学品的重要应用方向。然而，反应过程面临C-H、S-H键活化导致的碳硫中毒和C-S键稳定偶联难以精准调控等难题。构建高活性K-Mo-S@SiO2催化剂体系，避免CH4过度活化和催化剂硫中毒，通过K-Mo电子作用调控C-S键稳定偶联，有望为解决上述问题提供契机。本项目基于介孔SiO2包覆层载体表界面性质和开放孔结构限域效应对K-Mo-S在空间尺度上的调控，原位引入助剂K并改变Mo周边电子环境和调控Mo-S键至合适强度，实现目标反应体系的高效构筑。研究中辨识孔结构限域作用下的K-Mo-S相之间的相互作用和转化过程，建立催化剂本征活性位与反应活性间的构效关系，阐明碳硫小分子定向转化过程及反应机理。项目预期为实现CO2和H2S污染物协同资源化利用耦合化工原料甲基硫醇多元化来源提供新思路。

Synthesis of methyl mercaptan by one-step catalytic conversion of pollutant CO2 and H2S with cheap and abundant raw material CH4 is an important application, which can realize the cooperative transformation of CO2 and H2S into value-added chemicals. However, the process is faced with the problems of carbon and sulfur poisoning caused by activation of C-H and S-H bonds, and the difficulty in the regulation of stable coupling of C-S bonds. Highly active K-Mo-S@SiO2 catalysts are constructed to avoid excessive activation of CH4 and sulfur poisoning of the catalyst, and the stable coupling of C-S bond is regulated by the electron action between K and Mo, which is expected to provide an opportunity to solve the above problems. This project is based on the control of K-Mo-S on the spatial scale and resulted from the surface properties of the mesoporous SiO2 and the open pore structure. The surrounding electronic environment of Mo is modified by in-situ inroduce of K, and the Mo-S bond are adjusted to a suitable strength. In the study, the interaction and conversion process of the K-Mo-S phase under the restriction of the pore structure are identified, while the structure-activity relationship between the intrinsic active site of the catalyst and the activity is established. Besides, the conversion process and mechanism from the reaction are clarified. The project is expected to provide a new idea for the utilization of CO2 and H2S and achieving multiple sources of chemical raw material methyl mercaptan.