路易斯酸
催化作用
环加成
化学
基础(拓扑)
结晶学
立体化学
有机化学
数学
数学分析
作者
Juncong Yuan,Ranfei Fu,Zeping Wang,Xiuhui Zheng,Yichen Wang,Hao Yan,Yibin Liu,Yongquan Qu,Guang‐Yu Zhang,Bing Sun,Lin Wang,Wei Xu,Xiang Feng,De Chen,Chaohe Yang
出处
期刊:ACS Catalysis
[American Chemical Society]
日期:2024-07-09
卷期号:14 (14): 11045-11050
被引量:31
标识
DOI:10.1021/acscatal.4c03326
摘要
Activation of CO2 faces great challenges due to its high chemical inertness. Herein, we constructed interfacial low-coordinated Mg3C2+-O3C2– Lewis acid–base pairs on highly defective MgO by modulating the local coordination environment of the central Mg species for effective CO2 activation. Through various in situ techniques, significantly enhanced CO2 adsorption strength and capacity (∼80%) were detected qualitatively on the low-coordinated Mg3C2+-O3C2– pairs, where O3C2– and Mg3C2+ function as Lewis base and acid sites, respectively. The MgO catalysts with rich Mg3C2+-O3C2– Lewis acid–base pairs delivered 6.18 times higher activity compared to commercial MgO catalysts for propylene epoxide cycloaddition with CO2 in the absence of solvent and cocatalyst. Also, the selectivity of propylene carbonate reached 99.3%. The MgO catalysts were also demonstrated successfully for cycloaddition between CO2 and various epoxides. This work paves the way for the rational construction of active sites in oxide catalysts for CO2 activation.
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