MOF衍生Zr掺杂CeO2催化CO2和甲醇合成碳酸二甲酯性能研究OA

The conversion of CO2 to dimethyl carbonate(DMC)represents a promising route for sustainable synthesis and carbon resource utilization.In this study,a series of Zr-doped CeO2 catalysts derived from metal-organic frameworks(MOFs)via hydrothermal synthesis were applied to the direct synthesis of DMC from CO2 and CH3OH.The effects of varying Zr doping levels(molar fraction,the same below)on catalytic performance were systematically investigated,and the optimal Zr doping amount was determined.The catalysts were characterized using X-ray diffraction,high-resolution transmission electron microscopy,N2 adsorption-desorption,and X-ray photoelectron spectroscopy to elucidate their crystal phase,morphology,surface chemical states,and correlations between these properties and catalytic activity.Using the Zr/CeO2 catalyst with a 2%Zr doping level,the optimal process conditions for DMC synthesis from CO2 and CH3OH were investigated.The results indicate that under the conditions of 140 ℃,an initial CO2 pressure of 3 MPa,and a reaction time of 2 hours,the Zr/CeO2 catalyst with a 2%Zr doping content exhibits the highest CH3OH conversion rate and DMC production.