Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn3O4, Mn3O4-CeO2, and CeO2 Catalysts in Tight Contact Conditions
The reaction mechanism of soot oxidation on Mn (Mn<sub>3</sub>O<sub>4</sub>), Mn-Ce (Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>), and Ce (CeO<sub>2</sub>) catalysts in tight contact conditions was investigated using ITKA (isotopic transient kinetic analysis). The obtained results suggest that lattice-bulk oxygen from all studied catalysts takes part in the soot oxidation process but with varying relative contributions: for the Ce catalyst, this contribution is practically 100%, whereas with decreasing Ce content in Mn-Ce catalysts, the significance of lattice-bulk oxygen for soot oxidation diminishes. For the Mn catalyst, it is estimated to be below 50%. Moreover, strong interactions between Mn and Ce ions were observed, increasing oxygen mobility in the catalyst crystal lattice and affecting the activity of Mn-Ce catalysts.
Authors
- Marek Rotko (ORCID: https://orcid.org/0000-0001-9598-2155)
- Karolina Karpińska-Wlizło (ORCID: https://orcid.org/0000-0003-3259-159X)
Institutions
- Maria Curie-Skłodowska University (PL)
Publication Details
- Journal
- Molecules
- Published
- 2025-01-16
- DOI
- https://doi.org/10.3390/molecules30020343
- Citations
- 4
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 2.07