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Adjusting the conduction properties of La0.995Ca0.005NbO4 by doping for proton conducting fuel cells electrode operation

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Adjusting the conduction properties of La0.995Ca0.005NbO4 by doping for proton conducting fuel cells electrode operation

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dc.contributor.author Solis Díaz, Cecilia es_ES
dc.contributor.author Serra Alfaro, José Manuel es_ES
dc.date.accessioned 2017-09-18T08:35:24Z
dc.date.available 2017-09-18T08:35:24Z
dc.date.issued 2011-05-19
dc.identifier.issn 0167-2738
dc.identifier.uri http://hdl.handle.net/10251/87407
dc.description.abstract [EN] Structural characterization and transport properties of A- (Ce and Pr) and B-site (Mn) doped La0.995Ca0.005- NbO4 (-) (delta) (LCN) have been investigated. Conductivity data have been analyzed in the temperature range from 400 to 800 degrees C as a function of the oxygen partial pressure under dry atmospheres and under different wet atmospheres. All compounds present changes in the activation energy due to a phase transformation at ca. 550 degrees C. Under wet conditions the conductivity is predominantly protonic in all compounds except for the Ce doped sample under oxidizing atmospheres. The conductivity of Ce doped sample is principally electronic at high pO(2) and high temperatures while it becomes more ionic at low pO(2) and temperatures. The combination of n-type electronic and protonic conductivity for Ce doped LCN under reducing atmospheres suggests its potential application as an anode component for LCN-based proton conducting fuel cells (PCFC). Moreover, Pr doped LCN shows remarkable p-type electronic conductivity at high pO(2) in combination with protonic conductivity, which are interesting properties for LCN-based PCFC cathode components. Furthermore, Ce and Pr addition have allowed increasing the sintering activity with respect to LCN powders. The activation energies and the preexponential factors under wet atmospheres have been studied and correlated. It was found that they obey the Meyer-Neldel law and an estimation of the activation energy of protons in both crystal structures has been derived. (C) 2011 Elsevier B.V. All rights reserved. es_ES
dc.description.sponsorship Funding from the European Union (FP7 Project EFFIPRO - Grant Agreement 227560) and the Spanish Ministry for Science and Innovation (Project ENE2008-06302 and CSIC Intramural 200880I093) is kindly acknowledged. Authors are indebted to M. Fabuel for sample preparation. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation MICINN/ENE2008-06302 es_ES
dc.relation MICINN/CSIC/200880I093 es_ES
dc.relation.ispartof Solid State Ionics es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Proton conductor es_ES
dc.subject PCFC es_ES
dc.subject Mixed proton-electron conductor es_ES
dc.subject LaNbO4 es_ES
dc.title Adjusting the conduction properties of La0.995Ca0.005NbO4 by doping for proton conducting fuel cells electrode operation es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.ssi.2011.03.008
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/227560/EU es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.description.bibliographicCitation Solis Díaz, C.; Serra Alfaro, JM. (2011). Adjusting the conduction properties of La0.995Ca0.005NbO4 by doping for proton conducting fuel cells electrode operation. Solid State Ionics. 190(1):38-45. https://doi.org/10.1016/j.ssi.2011.03.008 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1016/j.ssi.2011.03.008 es_ES
dc.description.upvformatpinicio 38 es_ES
dc.description.upvformatpfin 45 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 190 es_ES
dc.description.issue 1 es_ES
dc.relation.senia 41455 es_ES
dc.identifier.eissn 1872-7689
dc.contributor.funder European Commission
dc.contributor.funder Ministerio de Ciencia e Innovación


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