Molecular models of catalytically active sites in zeolites. Quantum chemical approachстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Авторы:
Zhidomirov G.M. ,
Yakovlev A.L.,
Milov M.A.,
Kachurovskaya N.A.,
Yudanov I.V.
Журнал:
Catalysis Today
Том:
51
Номер:
3-4
Год издания:
1999
Издательство:
Elsevier BV
Местоположение издательства:
Netherlands
Первая страница:
397
Последняя страница:
410
Аннотация:
A brief review of quantum chemical studies of different active sites in zeolites is presented. Various factors that significantly affect the strength of Brønsted acid sites in zeolites are discussed. An interaction of zeolite protons with entrapped metal particles is considered as a reason of electron-deficiency of metal clusters in zeolite cavities on the Pd and Pt species as an example. Probable precursors of Lewis acid sites (LAS) and reliable molecular models of the LAS in zeolites are discussed on the basis of quantum chemical analysis. Transition metal ions can be catalytically active in the lattice or extra-lattice zeolite positions and the two possibilities are considered for selective oxidation site in titanium silicalite and FeZSM-5 zeolite catalysts, respectively. © 1999 Elsevier Science B.V. All rights reserved.
Добавил в систему:
Жидомиров Георгий Михайлович