Effect of Fe doping on the catalytic performance of CuO–CeO2 for low temperature CO oxidation

Abstract

Cu₁Ce₈Fe_x–O catalysts for low temperature CO oxidation were prepared by an improved citrate sol–gel method with incorporation of thermal treatment under N₂, and characterized by the nitrogen adsorption–desorption, XRD, CO pulse experiments, CO-TPR and CO-TPD. When x = 1, the Cu₁Ce₈Fe₁–O catalyst shows higher catalytic activity for CO oxidation, and the reaction temperature for 90% CO conversion (T₉₀) is only 50 °C. The presence of Fe in Cu₁Ce₈Fe₁–O can improve the catalytic activity for CO oxidation, which results from its higher surface area, smaller crystalline size, higher activity and larger amounts of surface oxygen species.