期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 12, 期 27, 页码 7067-7077出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200600478
关键词
catalytic activity; density; functional calculations; Lewis acids; oxidation; zeolites
An experimental study of the activity of Ti-, Zr- and Sn-beta catalysts in different types of oxidation reactions is combined with a quantum-chemical analysis of the electronic properties of the active sites and the adsorbed reactants. The differences observed in the catalytic behaviour of the three materials are explained in terms of the molecular orbital distribution of each system. ne intrinsic Lewis acid strength of the isolated active site, the degree of back-donation front the catalyst to the empty orbitals of the organic reactant and the net atomic charges on selected atoms are proposed as predictors of reactivity.
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