Get access

Predicting the Activity of Single Isolated Lewis Acid Sites in Solid Catalysts

Authors

  • Mercedes Boronat Dr.,

    1. Instituto de Tecnología Química, UPV-CSIC Universidad Politécnica de Valencia Av. de los Naranjos, s/n, 46022 Valencia, Spain, Fax: (+34) 963-877-809
    Search for more papers by this author
  • Avelino Corma Prof. Dr.,

    1. Instituto de Tecnología Química, UPV-CSIC Universidad Politécnica de Valencia Av. de los Naranjos, s/n, 46022 Valencia, Spain, Fax: (+34) 963-877-809
    Search for more papers by this author
  • Michael Renz Dr.,

    1. Instituto de Tecnología Química, UPV-CSIC Universidad Politécnica de Valencia Av. de los Naranjos, s/n, 46022 Valencia, Spain, Fax: (+34) 963-877-809
    Search for more papers by this author
  • Pedro M. Viruela Prof. Dr.

    1. Institut de Ciència Molecular, Universitat de Valencia Polígono la Coma s/n, 46980 Paterna, Spain
    Search for more papers by this author

Abstract

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. The intrinsic Lewis acid strength of the isolated active site, the degree of back-donation from the catalyst to the empty orbitals of the organic reactant and the net atomic charges on selected atoms are proposed as predictors of reactivity.

Ancillary