Authors: Han‐Ying Wu, Ye‐Yan Qin, Yi‐Hong Xiao, Jian‐Shan Chen, Runping Ye, Rong Guo, Yuan‐Gen Yao
Published: 2023-02-03
Source: Full article
AbstractThe 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.