Redox and Catalytic Properties of Copper Molybdates with Various Composition

Abstract

Using XRD and temperature-programmed reduction (TPR), phase and structural transformations of copper molybdates Cu₃Mo₂O₉ and CuMoO₄ were investigated in the course of their treatment with hydrogen, carbon monoxide or soot. The catalytic properties of copper molybdates Cu₃Mo₂O₉ and CuMoO₄ were studied in model oxidation reactions of carbon monoxide and soot. Phase and structural transformations of the molybdates, in particular formation of Cu_4–xMo₃O₁₂ and Cu₆Mo₅O₁₈ phases, was shown to have a significant impact on the formation of active state of the catalysts in the model reactions considered.