催化作用
环加成
咪唑酯
沸石咪唑盐骨架
材料科学
化学工程
基质(水族馆)
选择性
沉积(地质)
化学
无机化学
金属有机骨架
有机化学
吸附
工程类
海洋学
地质学
古生物学
沉积物
生物
作者
Lihua Hu,Xiaohong Mo,Lihua Hu,Yuehang Wu,Feng Liu,Kangling Yin,Taotao Fan,Zongcheng Yan
标识
DOI:10.1002/slct.202200823
摘要
Abstract Controllable deposition of nanosphere with zeolitic imidazolate frameworks (ZIFs) is an efficient method to achieve unique properties and create new types of multifunctional ZIF core–shell materials with enhanced properties. Core‐shell ZIF‐67@CeO 2 nanosphere was designed with ZIF‐67 nanoparticles as seed for the deposition of CeO 2 nanocrystals. The as‐prepared ZIF‐67@CeO 2 nanosphere can catalyze CO 2 cycloaddition reaction with significant activity. The synergistic acid‐base catalytic sites of ZIF‐67@CeO 2 nanosphere were investigated through TPD analysis. These sites can effectively coordinate and activate the substrate molecules, thereby enhancing catalytic efficiency for CO 2 cycloaddition reaction. The ZIF‐67@CeO 2 nanosphere showed almost 100.00 % conversion of styrene oxide and 100.00 % selectivity of desired cyclic carbonate (120 °C, 7.5 bar, and 8 h). In addition, ZIF‐67@CeO 2 showed a negligible decrease in the catalytic activity even after being reused for four cycles.
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