Study on the Interaction Between the Active Phase and Support on CuO/ZrO₂ Catalyst

Two methods,dipping of Zr（OH)₄ or ZrO₂ support in aqueous solution of Cu（NO₃） 2·4H₂O were adopted to prepare supported copper oxide on ZrO₂.Extensive characterization has been done on the physical-chemical properties of the system.In the TPR experiments,four TPR peaks were observed.In conjunction with the observation by XRD,it was concluded that highly dispersed copper（II）oxide and bulk copper（II）oxide were reduced to metallic copper,giving pesks α and β,γ and δ,respectively.Suface ocygen species were easily desorbed and reduced,and which leads to highly active for CO oxidation.