Combustion of Toluene Catalyzed by Pt/Co3O4/CeO2-ZrO2-SnO2/r-Al2O3

Abstract

A 1wt%Pt/Co₃O₄/CeO₂-ZrO₂-SnO₂/r-Al₂O₃ catalyst was prepared to realize complete combustion of toluene at the lowest temperature possible without excessive use of platinum particles. The addition of Co₃O₄ to Pt/ CeO₂-ZrO₂-SnO₂/r-Al₂O₃ as a promoter was effective in decreasing the amount of platinum without significant reduction in the catalytic activity. The highest activity for the combustion of toluene was observed using the 1wt%Pt/11wt%Co₃O₄/16wt%Ce_0.62Zr_0.20Sn_0.18O_2.0/r-Al₂O₃ catalyst, and despite a smaller platinum loading in the present catalyst, toluene was completely oxidized to carbon dioxide and water vapor at a lower temperature of 160 ^oC compared to that using 5wt%Pt/r-Al₂O₃ at 170 ^oC.