Hydration and transport properties of the Pr2−xSrxNiO4+δ compounds as H+-SOFC cathodes
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GRIMAUD, Alexis | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MAUVY, Fabrice | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BASSAT, Jean-Marc. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | FOURCADE, Sébastien | |
| hal.structure.identifier | European Institute For Energy Research [EIFER] | |
| dc.contributor.author | MARRONY, Mathieu | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GRENIER, Jean-Claude | |
| dc.date.issued | 2012 | |
| dc.identifier.issn | 0959-9428 | |
| dc.description.abstractEn | The 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.iso | en | |
| dc.publisher | Royal Society of Chemistry | |
| dc.subject.en | Solid solution | |
| dc.subject.en | SOFC | |
| dc.subject.en | Cathodes | |
| dc.title.en | Hydration and transport properties of the Pr2−xSrxNiO4+δ compounds as H+-SOFC cathodes | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1039/C2JM31812A | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Materials Chemistry | |
| bordeaux.page | 16017-16025 | |
| bordeaux.volume | 22 | |
| bordeaux.issue | 31 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00720625 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00720625v1 | |
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