The Catalytic Performance of CO Oxidation over MnOx-ZrO2 Catalysts: The Role of Synthetic Routes

MnOx-ZrO2 catalysts prepared by co-precipitation and vacuum impregnation were calcined at 400–800 °C characterized powder X-ray diffraction, textural studies, high-resolution transmission electron microscopy, temperature-programmed reduction, absorption near edge structure, photoelectron spectroscopy. The catalytic activity was tested in the CO oxidation reaction. of co-precipitated samples exceeds that impregnation. characterization studies showed nature active component for obtained differs from In series, most catalyst a temperature 400 °C; its increased is due to formation MnO2 oxide nanoparticles containing Mn4+ low-temperature reducibility. An increase synthesis leads less Mn2O3, sintering, and, accordingly, deterioration properties. case co-precipitation, are formed calcination 650–700 air. this interval, on one hand, MnyZr1?yO2?x solid solution formed, other partial separation mixed begins with highly dispersed MnOx. A further 800 complete decomposition solution, release manganese cations into Mn3O4, drop activity.