ZnWO₄-ZnO catalysts with different W content were prepared by conventional hydrothermal and wet impregnation methods and applied in the direct synthesis of glycerol carbonate from CO₂ and glycerol. The crystallite structure, texture property, morphology, redox and acid-base properties and the surface chemical situation of the catalysts were characterized by XRD, BET, TEM, H₂-TPR, NH₃/CO₂-TPD and XPS. The possible activation routes of CO₂ and glycerol were analyzed with DRIFTS and FTIR. ZnWO₄-ZnO composite catalysts showed better catalytic performances with respect to ZnO in the carbonylation of glycerol with CO₂. The improved activity of ZnWO₄-ZnO catalysts was associated with the formation of ZnWO₄, the interaction between ZnWO₄ and ZnO, and the enhanced moderate acidic property. DIRFTS results showed that chelating bidentate carbonate species was the main adsorption pattern for CO₂ on ZnO, while the introduction of W led to the bridged bidentate carbonate, which became the main adsorption pattern on ZnWO₄-ZnO. As for the activation of glycerol, zinc glycerolate played an important role in the reaction process. Based on the reaction and characterization results, a plausible reaction route involved a seven-membered ring esters intermediate was suggested for the reaction of CO₂ and glycerol over ZnWO₄-ZnO catalysts.

采用常规的水热湿法浸渍法制备了不同W含量的ZnWO ₄ -ZnO催化剂，并将其用于由CO ₂和甘油直接合成碳酸甘油酯。通过XRD，BET，TEM，H ₂ -TPR，NH ₃ / CO ₂ -TPD和XPS对催化剂的微晶结构，织构性质，形貌，氧化还原和酸碱性质以及表面化学性质进行了表征。用DRIFTS和FTIR分析了CO ₂和甘油的可能活化途径。ZnWO ₄ -ZnO复合催化剂在甘油与CO ₂羰基化反应中表现出比ZnO更好的催化性能。。ZnWO的改善的活性₄ -ZnO催化剂用ZnWO的形成相关联的₄，ZnWO之间的相互作用₄和ZnO，和增强的温和酸性。DIRFTS结果表明，螯合碳酸二齿碳酸盐种类是ZnO上CO ₂的主要吸附模式，而W的引入导致桥接的碳酸二齿碳酸盐，这成为ZnWO ₄ -ZnO上的主要吸附模式。至于甘油的活化，甘油酸锌在反应过程中起重要作用。根据反应和表征结果，提出了一种可行的反应路线，该路线涉及七元环酯中间体，用于CO ₂的反应。甘油和ZnWO ₄ -ZnO催化剂上的甘油。