The phase composition and reduction of CoO-Al2O3, MoO3-Al2O3, and CoO-MoO3-A12O3 catalysts

1.The method of photoelectron spectroscopy has been used to show that the Co and Mo ions of CoO-MoO₃-Al₂O₃ catalysts interact with the ?-Al₂O₃ lattice, the Mo ions blocking the penetration of the Co ions. Formation of metallic Co promotes extensive Mo ion reduction.2.Thermal treatment of the CoO-MoO₃-Al₂O₃ catalyst in air tends to enrich the surface with respect to Mo ions, while reduction enriches the surface with respect to Co ions.3.Oxidational treatment of the CoO-MoO₃-Al₂O₃ and MoO₃-Al₂O₃ catalysts is required for formation of anthracene radical-cations. A description is given of an oxidizing center structure which accounts for the reduction in acceptor activity of the Mo⁶⁺ ions in the ternary system.