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K-doped CuO/ZnO with Dual Active Centers of Synergism for Highly Efficient Dimethyl Carbonate Synthesis
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  • Han Han,
  • Xue Ye,
  • Jie Yao,
  • Xinhua Gao,
  • Jinghao Yu,
  • Lisheng Guo,
  • jie Li
Xinhua Gao
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Jinghao Yu
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Lisheng Guo
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jie Li

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The application of heterogeneous catalysts in dimethyl carbonate (DMC) synthesis from methanol is hindered by low activation efficiency of methanol to methoxy intermediates (CH3O*), which is the key intermediate for DMC generation. Herein, a catalyst of alkali metal K anchored on the CuO/ZnO oxide is rationally designed for offering Lewis acid-base pairs as dual active centers to improve the activation efficiency of methanol. Characterizations of CO2-TPD, NH3-TPD, XPS, and DRIFTS revealed that the addition of Lewis base K observably boosted the dissociation of methanol and combined with Lewis acid CuO/ZnO oxide to adsorb the formed CH3O* stably, thus synergistically promoted the transesterification. Finally, the CuO/ZnO-9%K2O catalyst exhibited the optimal catalytic activity, achieving a high yield of 74.4% with an excellent selectivity of 98.9% for DMC at a low temperature of 90 °C. The strategy of constructing Lewis acid-base pairs provides a reference for the design of heterogeneous catalysts.
21 Mar 2023Submitted to AIChE Journal
26 Mar 2023Submission Checks Completed
26 Mar 2023Assigned to Editor
26 Mar 2023Review(s) Completed, Editorial Evaluation Pending
01 Apr 2023Reviewer(s) Assigned
20 Apr 2023Editorial Decision: Revise Minor
04 May 20231st Revision Received
08 May 2023Submission Checks Completed
08 May 2023Assigned to Editor
08 May 2023Review(s) Completed, Editorial Evaluation Pending
27 May 2023Editorial Decision: Accept