Patil, S.S.Prasad Dasari, H.P.2026-02-042024Brazilian Journal of Chemical Engineering, 2024, 41, 1, pp. 269-2851046632https://doi.org/10.1007/s43153-023-00312-3https://idr.nitk.ac.in/handle/123456789/21272The Cu-loaded Ce-Pr catalyst series was successfully developed to study their performance on soot oxidation activity and its kinetic behavior. The doped samples showed a similar trend for cubic fluorite structure except for CuO, which possessed a monoclinic structure from the XRD analysis. Facet ratios [{100}/{111} and {110}/{111}] for the reactive planes were calculated from XRD spectra; the ratio was high for the 5 Cu-CP catalysts. The oxygen vacancy peaks were noticed from Raman spectra for the doped samples. 5 Cu-CP displayed the better catalytic activity of T<inf>50</inf> = 402 °C, which may be attributed to high reactive planes and better reducibility. The addition of Cu showed a slight enhancement in catalytic activity compared to CP and pure Ce. The kinetic triplets were evaluated: the activation energy (E<inf>a</inf>), pre-exponential factor (A), and the reaction model. Pure Ce displayed the lowest E<inf>a</inf> and A values, whereas pure Cu showed high E<inf>a</inf> and A values by all the methods. Graphical abstract: (Figure presented.) © The Author(s) under exclusive licence to Associação Brasileira de Engenharia Química 2023.Activation energyBinary alloysCatalyst activityCerium oxideCopperCopper oxidesDustFluorsparKineticsOxidationOxygenSootX ray powder diffractionCopper-loaded ceria-praseodymium catalystDoped sampleOxidation activitiesOxidation kineticsRaman spectroscopy analyseSoot oxidationSoot oxidation kineticThermo gravimetric analysis]+ catalystThermogravimetric analysis