Abstract: The interaction between Pt and carriers SiO₂, SiO₂-Al₂O₃, Al₂O₃, SiO₂-SnO₂ and Al₂O₃-SnO₂ was investigated by TPD and HOT method. It was shown that the order of the Pt-carrier interaction strength is Al₂O₃>SiO₂-Al₂O₃>SiO₂; It was found too that the oxide of Sn Possesses the action to strengthen the carrier effect of SiO₂ and Al₂O₃. On this basis, we suggested that the site of the Pt-carrier stronger interaction may be the surface complex of Pt and oxygen-dificient oxides Pt-(Al₂O_x) and Pt-(SnO_x).