Catalytic oxidation of benzene over MnOx/TiO2 catalysts and the mechanism study

• Among the MOx/TiO2 catalysts employed, MnOx/TiO2 showed the highest catalytic efficiency in the oxidation of benzene.
• The catalytic activities have a great relationship with the active oxygen species contents of the MnOx/TiO2.
• The reaction mechanism of benzene oxidation over MnOx/TiO2 was well demonstrated.

MOx/TiO2 composites with various metal species (M = Mn, Ce, Co, Fe) were synthesized and employed as in the catalytic oxidation of benzene. Among those materials, MnOx/TiO2 showed the highest catalytic efficiency. The catalytic activities of MnOx/TiO2 with different MnOx contents were also studied. XRD, BET, SEM, TEM, and XPS characterizations were conducted to analyze the physiochemical properties of the MnOx/TiO2 catalysts. Moreover, the reaction mechanism of benzene oxidation over MnOx/TiO2 was studied through the in situ FTIR experiments.

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