Controllable synthesis of MnO2/iron mesh monolithic catalyst and its significant enhancement for toluene oxidation

A series of monolithic MnO 2 /iron mesh (IM) catalysts for oxidation of toluene were successfully prepared by using in situ hydrothermal growth. MnO 2 can grow firmly on the IM substrates surface with a shedding rate of only 0.14%. Due to the highest O ads and high-valent Mn 4+ and Fe 3+ elements, the temperature at 50% and 90% toluene conversion ( T 50% and T 90% ) was 252 and 265 °C, respectively for the best performance catalyst (hydrothermal temperature of 80°C, hydrothermal time of 12 h, and precursor manganese ion concentration of 0.03 mol/L). The catalysts also presented good water resistance and cycle performance. In-situ DRIFTS results suggesting that toluene was first rapid transformed into the reaction intermediate species (benzoate species) and then converted to CO 2 and H 2 O. Therefore, this work provides a new direction for the research and application of IM-based monolithic catalysts. Monolithic MnO 2 /iron mesh (IM) catalysts with excellent toluene oxidation performance were successfully prepared using in-situ hydrothermal growth, which provides a new direction for the research and application of monolithic catalysts.