Catalytic Combustion of Benzene over Au Supported on Ceria and Vanadia Promoted Ceria

摘要

Complete oxidation of benzene over Au/CeO2 and Au/V2O5/CeO2 catalysts were studied. Gold was supported on CeO2 from different sources by deposition precipitation method. The catalysts were characterized by XRD, BET, X-ray photoelectron spectroscopy, TEM, and H2-TPR techniques. The catalytic activity toward the complete oxidation of benzene to CO2 and water were strongly dependent on the kind of CeO2 sources, loading amount of gold, modified amount of vanadia, and calcination temperature. High activities were obtained on 1% Au/CeO2 and 2% vanadia modified Au/CeO2 catalysts calcined at 300 °C. The nanometer size of Au particle and interaction between Au, V2O5, and CeO2 play important roles in determining the activity of benzene complete oxidation.