分子筛材料的酸性和择形选择性的固体核磁共振研究  

Study by Solid-state NMR Spectroscopy on the Acidity and Shape-selectivity of Zeolites

作　　者：赵淑芳 黄骏 ZHAO Shufang;HUANG Jun(Laboratory for Catalysis Engineering,School of Chemical and Biomolecular Engineering,Sydney Nano Institute,The University of Sydney,NSW 2006,Australia)

机构地区：[1]悉尼大学化学与生物分子工程学院,悉尼纳米中心,催化工程实验室,悉尼2006

出　　处：《高等学校化学学报》2021年第1期165-178,共14页Chemical Journal of Chinese Universities

基　　金：澳大利亚研究理事会发现计划项目(批准号:DP150103842,DP180104010)资助;the SOAR Fellowship;the Sydney Nano Grand Challenge from the University of Sydney

摘　　要：分子筛材料具有酸性可调节和择形选择性的优势,因而在多相催化反应中表现出优异的性能.本文综述了利用固体核磁共振(ssNMR)光谱对分子筛的酸性和择形选择性进行研究的最新进展.通过采用或不采用探针分子的ssNMR技术,探测了分子筛中酸性位的数量、酸强、酸类型及酸位之间的协同作用.此外,通过直接观察多相催化反应中关键中间体的存在,ssNMR光谱提供了分子筛择形选择性的证据.酸性和择形选择性的协同作用有助于更好地设计分子筛材料,以实现更好的多相催化.Zeolites have the desired advantages of tunable acidity and shape selectivity for their outstanding performance in heterogeneous catalysis.This review focuses on the recent progress in the understanding of acidity and shape-selectivity in zeolites by solid-state nuclear magnetic resonance(ssNMR)spectroscopy.The number,strength,type,and synergistic effect of the acid sites in zeolites have been explored by ssNMR with/without probe molecules.Moreover,ssNMR investigations provide evidence of the shape-selectivity of zeolites by the direct observation of crucial intermediates in heterogeneous reactions.The synergy of the acidity and shape-selectivity helps the better design of the zeolites for better heterogeneous catalysis.

关 键 词：酸性 择形选择性 分子筛 固体核磁共振 协同效应 

分 类 号：O643[理学—物理化学]