Study on the preparation,characterization and its catalytic performance of Co₃V₂O₈ catalyst

Co₃V₂O₈ catalyst was prepared by co-precipitation method and was characterized by XRD, BET, H₂-TPR, XPS and TEM in this paper. The catalytic performance for the oxidative dehydrogenation of propane to propylene has also been investigated. The results of H₂-TPR and XPS illustrated that the transformation of lattice oxygen to mobile oxygen species (non-complete reduction oxygen) might promote the oxidation-reduction reaction between different valence vanadium, which led to abundant non-complete reduction oxygen O^- and V⁴⁺ species formation over the Co₃V₂O₈ catalyst surface. The active results showed that 49.45% and 33.74% propylene selectivity could be obtained at the reaction temperature of 425℃ and 475℃ respectively.