碱度
催化作用
选择性
碳酸二甲酯
化学
无机化学
吸附
表面改性
碳酸盐
基础(拓扑)
协同催化
亚硝酸盐
酸碱反应
有机化学
物理化学
硝酸盐
数学分析
数学
作者
Hanying Wu,Ye‐Yan Qin,Yi‐Hong Xiao,Jiangshan Chen,Run‐Ping Ye,Rong Guo,Yuan‐Gen Yao
出处
期刊:Small
[Wiley]
日期:2023-02-03
卷期号:19 (18)
被引量:12
标识
DOI:10.1002/smll.202208238
摘要
The acid-base properties of supports have an enormous impact on catalytic reactions to regulate the selectivity and activity of supported catalysts. Herein, a train of Pd-X-UiO-66 (X = NO2 , NH2 , and CH3 ) catalysts with different acidity/alkalinity functional groups and encapsulated Pd(II) species is first developed, whose activities in dimethyl carbonate (DMC) catalysis are then investigated in details. Thereinto, the Pd-NO2 -UiO-66 catalyst with acidity functionalization exhibits the best catalytic behavior: the DMC selectivity stemmed from methyl nitrite (MN) is up to 68%, the conversion of CO is 73.4%. The obtained experimental results demonstrate that the NO2 group not only affected the interaction between X-UiO-66 and Pd(II) active sites but also play an indispensable role in the adsorption and activation of MN and CO, which remarkably promote the formation of the COOCH3* intermediate and DMC product.
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