Preparation of Au/MnO_x catalyst and its catalytic performance for CO Oxidation

摘要

In recent years, with the aggravating of environmental pollution, the purification of carbon monoxide is currently a subject of interest. The catalytic oxidation method is an effective way. Manganese oxide nanoparticles were prepared by emulsion self-assembly method and then, synthetic and commercial manganese oxide-supported gold nanoparticle catalysts were successfully synthesized by the deposition-precipitation (DP) method. The catalysts were characterized by XRD, Raman, BET, ICP and HRTEM. The activity of the oxide and oxide-supported gold nanoparticle catalysts were evaluated on the fixed bed microreactor and Au/MnO_x had the highest activity. The intrinsic activity of Au/MnO_x at 35 °C is 0.81 mol_(CO)-mol~(-1)Au-min~(-1) Compared with O_2, CO concentration has bigger effect on the reaction activity.