Szczegóły publikacji
Opis bibliograficzny
Unravelling cobalt incorporation in Ca- and Sr-rich perovskites: how symmetry shapes the phases / Paulina GWÓŹDŹ, Alexey Maximenko, Agnieszka ŁĄCZ, Ewa DROŻDŻ // Materials Chemistry and Physics ; ISSN 0254-0584. — Tytuł poprz.: Materials Chemistry. — 2025 — vol. 331 art. no. 130180, s. 1-10. — Bibliogr. s. 9-10, Abstr. — Publikacja dostępna online od: 2024-11-21
Autorzy (4)
- AGHGwóźdź Paulina
- Maximenko Alexei
- AGHŁącz Agnieszka
- AGHDrożdż Ewa
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 156923 |
|---|---|
| Data dodania do BaDAP | 2025-01-28 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.matchemphys.2024.130180 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Materials Chemistry and Physics |
Abstract
The Ca-rich and Sr-rich stoichiometric and non-stoichiometric materials were obtained by the modified citrate method. After calcination at 900 °C, materials were characterized in terms of structure, microstructure and reducibility in an H2-containing atmosphere. The diffractometric data did not confirm the presence of Co-originated phases. Co K-edge and Ti K-edge were recorded and analyzed for a deeper description of the structural properties of materials, mainly the influence of non-stoichiometry on the effectiveness of Co incorporation into the perovskite systems. The X-ray absorption near edge structure study combined with temperature programmed reduction results indicated the presence of CoTiO3 and cobalt oxides phases for Ca-rich and Sr-rich. This approach also allowed to observe that non-stoichiometry in Sr-rich materials results in a lower amount of cobalt incorporated into the perovskite structure and a higher amount of Co3O4 formed. Additionally, for Ca-rich materials, XANES spectra indicated a higher amount of Co in the Ti sublattice and confirmed the higher Co2+/Co3+ ratio than in the case of Sr-rich materials.
