Cluster model study on the surface interactions of g-alumina-supported metal oxides

Cluster models embodying the periodicity and symmetry of atomic arrangement on the surface of g-Al O , as a support, 2 3 Ž . have been applied to discuss the dispersion state of metal oxide i.e., MoO , NiO, or CuO on the basis of the incorporation 3 model from the theoretical chemistry’s point of view. The preference occupation of the tetrahedral or octahedral vacant sites available on the surface of g-Al O by the dispersed metal cations is related to the intrinsic properties and the amount of the 2 3 dispersed metal oxide as well as the calcination temperature used for sample preparation. The results are in good agreement with the experimental facts. q 1999 Elsevier Science B.V. All rights reserved.