Szczegóły publikacji
Opis bibliograficzny
Evaluation of $BaY_{1-x}Pr_{x}Mn_{2}O_{5 + \delta}$ oxides for oxygen storage technology / Alicja KLIMKOWICZ, Konrad ŚWIERCZEK, Kun ZHENG, Monika Baranowska, Akito Takasaki, Bogdan Dąbrowski // Solid State Ionics ; ISSN 0167-2738. — 2014 — vol. 262 spec. iss., s. 659–663. — Bibliogr. s. 663, Abstr. — Proceedings of the 19th international conference on Solid state ionics
Autorzy (6)
- AGHKlimkowicz Alicja
- AGHŚwierczek Konrad
- AGHZheng Kun
- AGHBaranowska Monika
- Takasaki Akito
- Dąbrowski Bogdan
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 82249 |
|---|---|
| Data dodania do BaDAP | 2014-06-27 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.ssi.2013.11.001 |
| Rok publikacji | 2014 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Solid State Ionics |
Abstract
Crystal structure and oxygen storage properties of A-site ordered BaY1 (-) xPrxMn2O5 + delta (x = 0, 0.25, 0.5, 0.75 and 1) perovskite-type oxides are reported, showing almost complete and reversible change (Delta delta > 0.94 mol mol(-1)) occurring between fully reduced BaY1 - xPrxMn2O5 and oxidized BaY1 - xPrxMn2O6 during reduction in 5 vol.% H-2 in Ar atmosphere and oxidation in air at 500 degrees C. All reduced compounds, as well as oxidized ones for x >= 0.5 possess tetragonal structure with P4/nmm (or P4/mmm for BaPrMn2O6) symmetry at room temperature. In the case of BaY0.75Pr0.25Mn2O6 and BaYMn2O6, good Rietveld refinements of XRD data were obtained assuming either monoclinic P121 or triclinic P-1 symmetry. The oxidation process causes a significant decrease of unit cell volume, which is additionally linearly dependent on average ionic radius of Y1 - xPrx. Due to a higher molar mass, an increasing Pr content causes a decrease of reversible oxygen storage capacity; nevertheless, Pr-containing materials show improved reduction rate and oxidize at lower temperatures. The optimized BaY0.75Pr0.25Mn2O5-BaY0.75Pr0.25Mn2O5 system showed very stable performance for 50 cycles. The obtained results indicate that by an appropriate chemical modification, it is possible to enhance oxygen storage-related properties of BaY(1 - x)Ln(x)Mn(2)O(5 + delta) (Ln - lanthanides) oxides, and such materials are promising for oxygen storage technology application. (C) 2013 Elsevier B.V. All rights reserved.
