Gold Supportedon Iron Oxide Nanodisk as EfficientCatalyst for The Removal of Toluene.

Inthe present study, nanodisk-like Fe2O3was firstprepared using the hydrothermal method, and then its supportedgold catalysts (xAu/Fe2O3nanodisk, x= 0.71–6.55 wt %) were fabricated using the polyvinylalcohol-protected reduction method. Under the reaction conditionsof toluene concentration = 1000 ppm, toluene/O2molar ratio= 1/400, and space velocity = 20 000 mL/(g h), 6.55Au/Fe2O3nanodisk performed the best (T50%= 200 °C and T90%= 260 °C). The apparent activation energies (46–50 kJ/mol)obtained over the xAu/Fe2O3nanodisk were smaller than that (65 kJ/mol) obtained over the Fe2O3nanodisk for toluene oxidation. We concludethat the high oxygen adspecies concentration, good low-temperaturereducibility, and strong interaction between Au nanoparticles andthe Fe2O3nanodisk are responsible for the highcatalytic performance of the 6.55Au/Fe2O3nanodisk. [ABSTRACT FROM AUTHOR]