Decomposition of ozone using carbon-supported metal oxide catalysts

Ozone decomposition was investigated over a series of activated carbon-supported oxide catalysts deposited on cordierite foam substrates. Emphasis was placed on the study of binary oxide combinations formed from MnO2, Co3O4, Fe2O3 and NiO, the most active transition-metal single oxides for the reaction. The MnO2–Fe2O3 system showed the highest ozone decomposition activity. Laser Raman results under ambient and dehydrated conditions suggested an interaction between MnO2 and Fe2O3. The introduction of organic and inorganic binders increased both the physical stability and activity of the catalysts.