Preparation of a monolith MnO x –CeO 2 /La–Al 2 O 3 catalyst and its properties for catalytic oxidation of toluene

MnO x –CeO 2 /La–Al 2 O 3 catalysts prepared by the deposition–precipitation method, impregnation method and a combination of the two methods were investigated for toluene oxidation. The results showed that the MnO x –CeO 2 /La–Al 2 O 3 catalyst prepared by the deposition–precipitation method showed the best catalytic activity by achieving the complete conversion of toluene at 300 °C with a GHSV of 12 000 h −1 . N 2 adsorption–desorption, XRD, SEM-EDX, H 2 -TPR, O 2 -TPD, Toluene-TPD and XPS were employed for catalyst characterization. The characterization results revealed that the MnO x –CeO 2 /La–Al 2 O 3 catalyst prepared by the deposition–precipitation method had richer surface oxygen species, a higher proportion of Mn 4+ and good low-temperature redox properties, which resulted in a superior catalytic activity toward complete oxidation of toluene.