Low Temperature Liquid Phase CO2 Hydrogenation to Methanol over Molybdenum Carbide-Based Catalysts By

Different metal depositions onto Mo2C catalysts for the low temperature hydrogenation of CO2 to methanol was studied in this paper. With the Mo2C material as a catalyst support, we aim to identify the effect of different metal deposition on the reaction activities and selectivities. Several metal/Mo2C catalysts were synthesized and characterized using X-ray diffraction, chemisorption, N2 physisorption and inductively coupled plasma. Our results show that copper, iron and palladium outperformed other tested metal species (cobalt and ruthenium) over Mo2C to facilitate the CO2 hydrogenation to methanol. In addition, the kinetic analysis was performed for the CO2 hydrogenation to methanol over Cu/Mo2C catalyst. The activation energy was determined to be 82.3 kJ/mol based on Arrehnius law at the low temperatures from 115 to 150 °C. These results provide useful information for the design of metal/Mo2C catalysts used for CO2 hydrogenation to methanol via single or cascade catalytic systems