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Opis bibliograficzny
Modification of Ruddlesden-Popper-type $Nd_{2-x}Ni_{0.75}Cu_{0.2}M_{0.05}O_{4\pm\delta}$ by the Nd-site cationic deficiency and doping with Sc, Ga or In: crystal structure, oxygen content, transport properties and oxygen permeability / Anna NIEMCZYK, Anna STĘPIEŃ, Kacper CICHY, Juliusz DĄBROWA, Zijia ZHANG, Bartłomiej GĘDZIOROWSKI, Kun ZHENG, Hailei Zhao, Konrad ŚWIERCZEK // Journal of Solid State Chemistry ; ISSN 0022-4596. — 2021 — vol. 296 art. no. 121982, s. 1–10. — Bibliogr. s. 9–10, Abstr. — Publikacja dostępna online od: 2021-01-19. — A. Niemczyk – dod. afiliacje: Center for Hydrogen Technologies (CTH2). Institute of Power Engineering ; Institute of Power Engineering ; Z. Zhang – dod. afiliacja: University of Science and Technology Beijing, China ; K. Zheng, K. Świerczek – dod. afiliacja: AGH Centre of Energy
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Dane bibliometryczne
| ID BaDAP | 132362 |
|---|---|
| Data dodania do BaDAP | 2021-02-01 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jssc.2021.121982 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Solid State Chemistry |
Abstract
Nd2-xNi0.75Cu0.2M0.05O4±δ (x = 0 and 0.1; M = Sc, Ga, and In) Ruddlesden-Popper-type oxides are obtained by a sol-gel route and characterized concerning phase composition and crystal structure. It is found that the largest In3+ cannot be effectively introduced into the structure, while Nd stoichiometric and cation-deficient Nd2-xNi0.75Cu0.2Sc0.05O4±δ and Nd2-xNi0.75Cu0.2Ga0.05O4±δ (x = 0; 0.1) can be obtained as single-phase materials. Systematic characterization of the crystal structure at high temperatures, oxygen content, as well as transport properties reveals that while the Nd-site deficiency has rather negligible influence on the structure, it causes a substantial decrease of the oxygen content, which at high temperatures leads to a change of the dominant type of defects from the oxygen interstitials to the vacancies for Nd1.9Ni0.75Cu0.2Sc0.05O4±δ and Nd1.9Ni0.75Cu0.2Ga0.05O4±δ. The Nd-site deficiency also causes a decrease of the total conductivity. Importantly, all the examined materials exhibit full chemical stability in CO2 atmosphere, which together with moderate thermal expansion makes them good candidates for the oxygen transport membranes, which can be used e.g. in the air separation technologies. The selected Sc- and Ga-doped compounds evaluated as ceramic membranes show relatively high oxygen fluxes, with the highest value of 0.78 mL cm-2 min-1 at ca. 880 °C registered for 0.9 mm thick, dense Nd1.9Ni0.75Cu0.2Ga0.05O4±δ membrane.