The interaction of rutile (TiO2) surface with some catalytically active transition metal oxides during heating, studied by electrochemical methods

The interaction of the surface of a rutile monocrystal (110 oriented) with the oxides of some transition metals (V, Mo, Cr, Mn and Nb) during heating of the crystal with these oxides was investigated by electrochemical method s. In all cases insertion of the metal atoms in the rutile surface was obse rved, the degree of insertion depending strongly on the metal in question a nd the conditions of experiment. The interaction of rutile surface with met al oxides changes dramatically the conditions of charge transfer at the rut ile surface, which may influence the course of catalytic reactions occurrin g at the surface of rutile-supported transition metal oxide catalysts.