Fabrication of high-performance CeO2–MnOx/TiO2/Ti monolithic catalysts for low-temperature and stable CO oxidation

Low-temperature CO oxidation as an important oxidation reaction for the removal of gaseous pollutants has been studied for years. The development of efficient, low-cost and long-term stable monolithic catalysts has practical significance for commercial application. In this work, we demonstrate an easily accessible strategy for supporting the in situ growth of TiO2 nanosheets on a flexible Ti mesh and the modification of CeO2 and MnOx active components through a multi-step deposition method. The CeO2–MnOx/TiO2/Ti monolithic catalysts show excellent CO oxidation catalytic activity, strong adhesion strength and outstanding long-term stability. The complete oxidation of CO can be achieved at 107.5 °C, which is comparable to some noble metal catalysts. SEM and TEM analyses reveal that the CeO2–MnOx/TiO2/Ti monolithic catalysts have homogeneous element distribution and good crystallinity. Moreover, the synthesis strategy of CeO2–MnOx monolithic catalysts with strong adhesion strength proposed in this work will open up more opportunities for the application of metal mesh monolithic catalysts towards CO oxidation, three-way catalysts (TWCs), selective catalytic reduction (SCR), etc.