CO2 is a major greenhouse gas,also an abundant,cheap and unwidely used carbon resource.The direct production of dimethyl carbonate(DMC)from CO2 and methanol is of great significance in the context of"dual carbon goals".However,the CO2 conversion and DMC yield are too low due to the reaction thermodynamic limitations and CO2 inertness.CeO2-based catalysts exhibit good performance in the direct synthesis of DMC from CO2 and methanol.In this review,the thermodynamics of direct DMC synthesis from CO2 and methanol,and the reaction mechanism as well as the research progress on CeO2-based catalysts were mainly introduced.The morphology regulation method,the surface properties of CeO2-based catalysts,and its coupling with high-efficiency dehydrating agents were then summarized in detail.Finally,it was suggested that future research should be focused on the preparation of CeO2-based catalysts with high specific surface area and high concentration of active sites,in-situ characterization of oxygen vacancy concentration,and the development of new inexpensive and efficient dehydration agents.
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