Enhanced performance of Cu-based perovskite catalyst for CO2 hydrogenation to methanol

The direct catalytic synthesis of methanol from CO2 and H2 has emerged as a significant area of research for the high-value utilization of CO2. Cu-based catalysts have attracted considerable attention due to their costeffectiveness and superior performance. In this study, we developed a novel catalyst, LMCZ-181, derived from the perovskite-type precursor La2CuO4 through a citrate complexation method. The findings revealed that doping with Mn and Zn modified the catalyst's crystal structure by increasing oxygen vacancies and promoting the formation of active sites, consequently enhancing catalytic activity. The results of In-situ DRIFTS demonstrated that these catalysts facilitated CO2 hydrogenation via the formate pathway and confirmed that LMCZ-181 possessed superior hydrogenation capability. At an operating temperature of 270 degrees C, LMCZ-181 exhibited optimal catalytic activity and stability, achieving a CO2 conversion of 20.81 % and a methanol selectivity of 77.68 %. This study provides an effective strategy for developing highly active and stable catalysts for CO2 hydrogenation for methanol production.