Preparation of Au/P25 Catalysts for Removal of CO by Dielectric Barrier Discharge Plasma

Atmospheric-pressure dielectric barrier discharge (DBD) cold plasma was used to prepare high performance Au/P25 catalysts (Au/P25-P). XRD and UV-Vis DRS spectra for Au/P25 catalysts were performed. The results indicated that the size of Au nanoparticles in Au/P25-P was smaller than that prepared by conventional thermal impregnation method (Au/P25-H). The temperature-dependent CO oxidation was performed to investigate the activity of Au/P25 catalysts. Au/P25-P gave excellent catalytic activity for CO oxidation than that of Au/P25-H. This may be attributed to the smaller size of Au nanoparticles in Au/P25-P.