Aspects of Fe-Incorporation into CaTiO<sub>3</sub>-SrTiO<sub>3</sub> Perovskites and Their Catalytic Application for Ammonia SCO/SCR
Perovskite materials in the CaTiO<sub>3</sub>-SrTiO<sub>3</sub> system doped with different amounts of iron (1, 2 and 5 mol.%) and various Ca/Sr ratios were prepared by the modified citrate method. Additionally, the materials with 0.05 deficiency in strontium/calcium sublatti...
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2024-11-01
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| author | Paulina Gwóźdź Agnieszka Łącz Sylwia Górecka Kateřina Pacultová Kamil Górecki Lucie Obalová Ewa Drożdż |
| author_facet | Paulina Gwóźdź Agnieszka Łącz Sylwia Górecka Kateřina Pacultová Kamil Górecki Lucie Obalová Ewa Drożdż |
| author_sort | Paulina Gwóźdź |
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| description | Perovskite materials in the CaTiO<sub>3</sub>-SrTiO<sub>3</sub> system doped with different amounts of iron (1, 2 and 5 mol.%) and various Ca/Sr ratios were prepared by the modified citrate method. Additionally, the materials with 0.05 deficiency in strontium/calcium sublattice and 5 mol.% of Fe were also synthesised. The materials were subjected to structural (XRD, XANES) and microstructural (SEM) characterisation, as well as the analysis of susceptibility to reduction/oxidation processes. The structural analysis indicates a lack of iron-containing phases; thus, an incorporation of Fe into the perovskite structure was postulated. Additionally, the oxidation state of iron in the perovskite structure changes with the dopant amount. The temperature-programmed reduction measurements showed partial reversibility of the reduction processes. For the materials with the highest iron amount, the catalytic tests in NH<sub>3</sub>-SCO and NH<sub>3</sub>-SCR reactions were carried out. The materials showed high catalytic activity and high selectivity to N<sub>2</sub> in the NH<sub>3</sub>-SCR process; however, they were inactive in NH<sub>3</sub>-SCO. |
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| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2024-11-01 |
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| series | Molecules |
| spelling | doaj-art-6b0d0628e9644e88b0b37601db9c6cc92024-12-13T16:28:25ZengMDPI AGMolecules1420-30492024-11-012923560310.3390/molecules29235603Aspects of Fe-Incorporation into CaTiO<sub>3</sub>-SrTiO<sub>3</sub> Perovskites and Their Catalytic Application for Ammonia SCO/SCRPaulina Gwóźdź0Agnieszka Łącz1Sylwia Górecka2Kateřina Pacultová3Kamil Górecki4Lucie Obalová5Ewa Drożdż6Department of Inorganic Chemistry, Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, PolandDepartment of Inorganic Chemistry, Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, PolandInstitute of Environmental Technology, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Porub, Czech RepublicInstitute of Environmental Technology, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Porub, Czech RepublicInstitute of Environmental Technology, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Porub, Czech RepublicInstitute of Environmental Technology, Centre for Energy and Environmental Technologies, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Porub, Czech RepublicDepartment of Inorganic Chemistry, Faculty of Materials Science and Ceramics, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, PolandPerovskite materials in the CaTiO<sub>3</sub>-SrTiO<sub>3</sub> system doped with different amounts of iron (1, 2 and 5 mol.%) and various Ca/Sr ratios were prepared by the modified citrate method. Additionally, the materials with 0.05 deficiency in strontium/calcium sublattice and 5 mol.% of Fe were also synthesised. The materials were subjected to structural (XRD, XANES) and microstructural (SEM) characterisation, as well as the analysis of susceptibility to reduction/oxidation processes. The structural analysis indicates a lack of iron-containing phases; thus, an incorporation of Fe into the perovskite structure was postulated. Additionally, the oxidation state of iron in the perovskite structure changes with the dopant amount. The temperature-programmed reduction measurements showed partial reversibility of the reduction processes. For the materials with the highest iron amount, the catalytic tests in NH<sub>3</sub>-SCO and NH<sub>3</sub>-SCR reactions were carried out. The materials showed high catalytic activity and high selectivity to N<sub>2</sub> in the NH<sub>3</sub>-SCR process; however, they were inactive in NH<sub>3</sub>-SCO.https://www.mdpi.com/1420-3049/29/23/5603perovskitesironammonia oxidationNOx reductionXANES |
| spellingShingle | Paulina Gwóźdź Agnieszka Łącz Sylwia Górecka Kateřina Pacultová Kamil Górecki Lucie Obalová Ewa Drożdż Aspects of Fe-Incorporation into CaTiO<sub>3</sub>-SrTiO<sub>3</sub> Perovskites and Their Catalytic Application for Ammonia SCO/SCR Molecules perovskites iron ammonia oxidation NOx reduction XANES |
| title | Aspects of Fe-Incorporation into CaTiO<sub>3</sub>-SrTiO<sub>3</sub> Perovskites and Their Catalytic Application for Ammonia SCO/SCR |
| title_full | Aspects of Fe-Incorporation into CaTiO<sub>3</sub>-SrTiO<sub>3</sub> Perovskites and Their Catalytic Application for Ammonia SCO/SCR |
| title_fullStr | Aspects of Fe-Incorporation into CaTiO<sub>3</sub>-SrTiO<sub>3</sub> Perovskites and Their Catalytic Application for Ammonia SCO/SCR |
| title_full_unstemmed | Aspects of Fe-Incorporation into CaTiO<sub>3</sub>-SrTiO<sub>3</sub> Perovskites and Their Catalytic Application for Ammonia SCO/SCR |
| title_short | Aspects of Fe-Incorporation into CaTiO<sub>3</sub>-SrTiO<sub>3</sub> Perovskites and Their Catalytic Application for Ammonia SCO/SCR |
| title_sort | aspects of fe incorporation into catio sub 3 sub srtio sub 3 sub perovskites and their catalytic application for ammonia sco scr |
| topic | perovskites iron ammonia oxidation NOx reduction XANES |
| url | https://www.mdpi.com/1420-3049/29/23/5603 |
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