MnxCo3-xO4 Microtubules with Enhanced Catalytic Activity Towards Toluene Combustion: Effects of Redox Property and Oxygen Species

The redox property and oxygen species play an important role in the catalytic oxidation of volatile organic compounds (VOCs).In this paper,a series of MnCoOcatalysts with tubular structure were synthesized and applied for the catalytic combustion of toluene.Various characterization technologies were employed to reveal the relationship between the catalytic performance of the MnCoOcatalysts and Mn doping.The results of XRD,SEM and Nadsorptiondesorption analyses showed that the Mn doping had significant effects on the structure and morphology of the MnCoOcatalysts.The H-TPR,O-TPD,and XPS results proved that the strong interaction between Co and Mn resulted in the enhanced Omobility,the richer active oxygen species,and the enhanced redox property in comparison with the pure CoOsample,which were crucial to the improvement of the catalytic activity of Co-Mn catalysts.The best catalyst,Co5-Mn5 sample,exhibited a good and stable activity to catalytically oxidize toluene at low temperatures even in the presence of water vapor,indicating that it is a potential material to be used in the commercialization of catalytic abatement of toluene.