dc.creatorSoldati, Analía Leticia
dc.creatorBaque, Laura Cecilia
dc.creatorNapolitano, Federico Ricardo
dc.creatorSerquis, Adriana Cristina
dc.date.accessioned2017-01-09T21:00:51Z
dc.date.accessioned2018-11-06T11:51:09Z
dc.date.available2017-01-09T21:00:51Z
dc.date.available2018-11-06T11:51:09Z
dc.date.created2017-01-09T21:00:51Z
dc.date.issued2013-02
dc.identifierSoldati, 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.identifier0022-4596
dc.identifierhttp://hdl.handle.net/11336/11011
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1860200
dc.description.abstractNano-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.languageeng
dc.publisherElsevier Science
dc.relationinfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022459612006664
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jssc.2012.10.019
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectLSCF CATHODES
dc.subjectPEROVSKITE
dc.subjectB-SITE
dc.subjectXANES
dc.titleCobalt-Iron red-ox behavior in nano-structured La0.4Sr0.6Co0.8Fe0.2O3-delta cathodes
dc.typeArtículos de revistas
dc.typeArtículos de revistas
dc.typeArtículos de revistas


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