文献类型：期刊文献

中文题名：无机氧化物载体对催化CO_2与环氧化合物合成环状碳酸酯的促进作用(英文)

英文题名：The Role of Inorganic Oxide Supports in Synthesis of Cyclic Carbonates from Carbon Dioxide and Epoxides

作者：曹婷[1];孙立婷[1];石玉[1];华丽[1];张然[1];郭立[1];朱闻闻[1];侯震山[1]

机构：[1]华东理工大学工业催化研究所,结构可控先进功能材料及其制备教育部重点实验室,上海200237

年份：2012

卷号：33

期号：3

起止页码：416

中文期刊名：催化学报

外文期刊名：CHINESE JOURNAL OF CATALYSIS

收录：CSTPCD;;EI(收录号：20161502207040);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000302114300006)】；北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：This work was supported by the National Natural Science Foundation of China (20773037, 21073058) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (20100074110014).

语种：中文

中文关键词：无机氧化物;二氧化碳;环状碳酸酯;二氧化硅;羟基;硅烷基化;协同催化

外文关键词：inorganic oxide; carbon dioxide; cyclic carbonate; silica; hydroxyl groups; silylation; synergetic effect

摘要：以一系列无机氧化物与四丁基溴化铵为双组分催化剂体系,考察了其催化CO2和环氧化合物合成环状碳酸酯的反应性能.结果表明,在四丁基溴化铵与这些本身并没有催化活性的无机氧化物共同作用下,反应活性明显提高,表现出很强的协同催化作用.另外,通过对SiO2的表面硅烷基化,考察了其表面羟基数量对反应活性的影响,发现当SiO2的表面经过硅烷基化以后,反应活性大幅度降低,表明无机氧化物表面羟基对CO2环加成反应活性有非常显著的促进作用.
An inorganic oxide support coupled with a quaternary ammonium salt is an efficient catalyst for the cycloaddition of CO2 and epoxide to produce cyclic carbonates under relatively mild reaction conditions （90 oC, 4 MPa）. When tetrabutylammonium bromide （TBAB） was used alone, the activity of the cycloaddition reaction between carbon dioxide and epoxide was only moderate. When an inorganic oxide, especially one that has abundant surface hydroxyl groups was also employed, the reaction was accelerated significantly. This demonstrated that the inorganic oxide and TBAB had a strong synergetic effect for the cycloaddition reaction. Silica was chosen as a model oxide to study the role of surface hydroxyl groups in the reaction. When the surface of silica was silylated with trimethylchlorosilane or dimethyldichlorosilane, the catalytic activity decreased sharply due to surface silylation, which indicated clearly that the surface hydroxyl groups on the silica played a decisive role in influencing the catalytic activity.