Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> 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 (isoto...
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2025-01-01
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| author | Marek Rotko Karolina Karpińska-Wlizło |
| author_facet | Marek Rotko Karolina Karpińska-Wlizło |
| author_sort | Marek Rotko |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-fa7a4dd1a6b84782802dd635be270390 |
| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2025-01-01 |
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| series | Molecules |
| spelling | doaj-art-fa7a4dd1a6b84782802dd635be2703902025-01-24T13:43:41ZengMDPI AGMolecules1420-30492025-01-0130234310.3390/molecules30020343Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> Catalysts in Tight Contact ConditionsMarek Rotko0Karolina Karpińska-Wlizło1Department of Chemical Technology, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, 3 Maria Curie-Skłodowska Square, 20-031 Lublin, PolandDepartment of Chemical Technology, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, 3 Maria Curie-Skłodowska Square, 20-031 Lublin, PolandThe 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.https://www.mdpi.com/1420-3049/30/2/343diesel soot oxidationCeO<sub>2</sub>Mn<sub>3</sub>O<sub>4</sub>Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>ITKA |
| spellingShingle | Marek Rotko Karolina Karpińska-Wlizło Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> Catalysts in Tight Contact Conditions Molecules diesel soot oxidation CeO<sub>2</sub> Mn<sub>3</sub>O<sub>4</sub> Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub> ITKA |
| title | Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> Catalysts in Tight Contact Conditions |
| title_full | Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> Catalysts in Tight Contact Conditions |
| title_fullStr | Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> Catalysts in Tight Contact Conditions |
| title_full_unstemmed | Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> Catalysts in Tight Contact Conditions |
| title_short | Isotopic Transient Kinetic Analysis of Soot Oxidation on Mn<sub>3</sub>O<sub>4</sub>, Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>, and CeO<sub>2</sub> Catalysts in Tight Contact Conditions |
| title_sort | isotopic transient kinetic analysis of soot oxidation on mn sub 3 sub o sub 4 sub mn sub 3 sub o sub 4 sub ceo sub 2 sub and ceo sub 2 sub catalysts in tight contact conditions |
| topic | diesel soot oxidation CeO<sub>2</sub> Mn<sub>3</sub>O<sub>4</sub> Mn<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub> ITKA |
| url | https://www.mdpi.com/1420-3049/30/2/343 |
| work_keys_str_mv | AT marekrotko isotopictransientkineticanalysisofsootoxidationonmnsub3subosub4submnsub3subosub4subceosub2subandceosub2subcatalystsintightcontactconditions AT karolinakarpinskawlizło isotopictransientkineticanalysisofsootoxidationonmnsub3subosub4submnsub3subosub4subceosub2subandceosub2subcatalystsintightcontactconditions |