The prepared Co3O4 and MnCo2O4 catalysts were also tested in the gas phase oxidation of 2propanol to acetone (Figure ). Over Co3O4, activity is detected at 70 °C and a local maximum in the activity is observed at 195 °C. The concentration of the produced acetone plateaus before 300 °C, while the conversion increases until the maximum temperature at 400 °C. CO2 is the main byproduct, and its concentration profile experiences a steep increase at 240 °C, after which it also reaches a plateau.