The direct synthesis of dimethyl carbonate from methanol and CO 2 is a green and sustainable processes. In this paper, a new type of Zn-doped CeO 2 nanorods catalyst was successfully prepared by a facile hydrothermal process, and characterized by a combination of techniques including XRD, Raman, HRTEM, SEM, N 2 -sorption, CO 2 -TPD, NH 3 -TPD, XPS. The catalyst was employed as a catalyst for the synthesis of dimethyl carbonate from methanol and CO 2 . Catalytic results revealed that the Ce 1 Zn 0.1 O δ nanorods catalyst demonstrated superior catalytic activity, affording a high DMC yield of 24.2 mmol DMC /g cat , which compared favorably to other previously reported catalysts. According to the XPS and CO 2 -TPD measurements, in comparison with the pure CeO 2 nanorods, the surface oxygen vacancies and weak basic sites can be systemically enriched by introducing optimal amount of Zn dopants into CeO 2 to improve the catalytic activity for the reaction. This work establishes an efficient catalyst for the direct synthesis of dimethyl carbonate from CO 2 and methanol.[a] N.

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La2O2CO3 as a promising solid base catalyst for transesterification reaction has been widely investigated in heterogeneous catalysis. In this study, we synthesized a series of La2O2CO3 with controllable morphologies including nanosheets, nanorods, and nanoparticles exposed different crystal facets by a simple aqueous solution route, and then then explored the shape effect of La2O2CO3 on the catalytic performance of dimethyl carbonate (DMC) synthesis from transesterification of propylene carbonate (PC) with methanol. As expected, a La2O2CO3 nanosheets catalyst had the highest turnover frequency than nanoparticles and nanorods. The observed La2O2CO3 shape effect in catalysis was associated with its basicity. Characterization results revealed that the highest amount of strong basic sites on the surface of La2O2CO3 nanosheets predominantly exposed (001) planes were responsible for the higher catalytic activity.

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