dc.creator | Soldati, Analía Leticia | |
dc.creator | Baque, Laura Cecilia | |
dc.creator | Napolitano, Federico Ricardo | |
dc.creator | Serquis, Adriana Cristina | |
dc.date.accessioned | 2017-01-09T21:00:51Z | |
dc.date.accessioned | 2018-11-06T11:51:09Z | |
dc.date.available | 2017-01-09T21:00:51Z | |
dc.date.available | 2018-11-06T11:51:09Z | |
dc.date.created | 2017-01-09T21:00:51Z | |
dc.date.issued | 2013-02 | |
dc.identifier | Soldati, Analía Leticia; Baque, Laura Cecilia; Napolitano, Federico Ricardo; Serquis, Adriana Cristina; Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes; Elsevier Science; Journal of Solid State Chemistry; 198; 2-2013; 253-261 | |
dc.identifier | 0022-4596 | |
dc.identifier | http://hdl.handle.net/11336/11011 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1860200 | |
dc.description.abstract | Nano-sized La0.4Sr0.6Co0.8Fe0.2O3−δ (LSCF) perovskite samples (prepared by a conventional acetate route and a novel acetate synthesis with HMTA additives), were tested simulating a red–ox cycle. The crystallography was studied by X-ray Powder Diffraction (XPD) and the changes in the oxidation state of the perovskite B-site were evaluated by synchrotron X-ray Absorption Near Edge Spectroscopy (XANES). After a reducing treatment, LSFC particles show the appearance of a new phase that coexists with the original one. The structural change is accompanied by a Co and Fe formal oxidation states decrease, although Fe remains always closer to 4+ and Co closer to 3+. The treatment produces a B-site valence average reduction from 3.52+ to 3.26+ and the formation of oxygen vacancies. A re-oxidation treatment under O2 rich atmosphere at 800 °C for 10 h shows that the change is reversible and independent of the two chemical methods used to synthesize the LSCF nano-particles. | |
dc.language | eng | |
dc.publisher | Elsevier Science | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022459612006664 | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jssc.2012.10.019 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | LSCF CATHODES | |
dc.subject | PEROVSKITE | |
dc.subject | B-SITE | |
dc.subject | XANES | |
dc.title | Cobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |