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Hydration and transport properties of the Pr2−xSrxNiO4+δ compounds as H+-SOFC cathodes

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGRIMAUD, Alexis
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAUVY, Fabrice
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFOURCADE, Sébastien
hal.structure.identifierEuropean Institute For Energy Research [EIFER]
dc.contributor.authorMARRONY, Mathieu
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGRENIER, Jean-Claude
dc.date.issued2012
dc.identifier.issn0959-9428
dc.description.abstractEnThe result of the substitution of Pr3+ by Sr2+ in the 214 Ruddlesden-Popper Pr2NiO4+δ material was studied with regard to its electrochemical properties as a H+-SOFC cathode. Structural characterizations as well as physical properties of the Pr2−xSrxNiO4+δ compounds (x ≤ 0.50), in particular hydration as a function of water partial pressure, have shown that oxygen over-stoichiometry and oxygen exchange with atmosphere decrease with increasing x, which has been correlated with the stabilization of the 214 structure by Sr2+ substitution. Electrochemical studies on the oxygen reduction versus hydration have allowed determination of the rate determining steps of the formation of water and evidence the role of protons in Pr2NiO4+δ in contrast to Pr2−xSrxNiO4+δ oxides. It has been concluded that triple mixed conductivity (i.e. protonic, ionic as well as electronic conductivities) exists in this nickelate Pr2NiO4+δ. In addition, there was evidence for strong correlation between the insertion of protonic defects and additional oxygen in the interstitial position of Pr2NiO4+δ.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.subject.enSolid solution
dc.subject.enSOFC
dc.subject.enCathodes
dc.title.enHydration and transport properties of the Pr2−xSrxNiO4+δ compounds as H+-SOFC cathodes
dc.typeArticle de revue
dc.identifier.doi10.1039/C2JM31812A
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Materials Chemistry
bordeaux.page16017-16025
bordeaux.volume22
bordeaux.issue31
bordeaux.peerReviewedoui
hal.identifierhal-00720625
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00720625v1
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