Hydration properties and rate determining steps of the oxygen reduction reaction of perovskite-related oxides 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 | FOURCADE, Sébastien | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | ROCHERON, Laure | |
| 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 | 0013-4651 | |
| dc.description.abstractEn | Four mixed ionic-electronic conducting (MIEC) perovskite-related oxides were studied as potential H+-SOFC cathode materials: La0.6Sr0.4Fe0.8Co0.2O3−, Ba0.5Sr0.5Co0.8Fe0.2O3−, PrBaCo2O5+ and Pr2NiO4+. Their hydration properties were measured by TGA: Ba0.5Sr0.5Co0.8Fe0.2O3− shows the largest water uptake. Their electrochemical performances were characterized using BaCe0.9Y0.1O3− as electrolyte; polarization resistances as low as 0.5 cm2 were found at 600°C, for PrBaCo2O5+ and Pr2NiO4+. The rate determining steps of the oxygen reduction reaction were determined on the basis of electrochemical studies performed as a function of pH2O, in air. Proton transfer and water release appear to be the rate determining steps for Ba0.5Sr0.5Co0.8Fe0.2O3−, PrBaCo2O5+ and Pr2NiO4+. No rate determining step involving proton was found for La0.6Sr0.4Fe0.8Co0.2O3−. On the basis of this study, one can suggest that Ba0.5Sr0.5Co0.8Fe0.2O3−, PrBaCo2O5+ and Pr2NiO4+ show some protonic conduction as well as oxide diffusivity and can be labeled Triple Conducting (e-/O2−/H+) Oxides, so-called TCO. | |
| dc.language.iso | en | |
| dc.publisher | Electrochemical Society | |
| dc.subject.en | Chemical reactions | |
| dc.subject.en | SOFC | |
| dc.subject.en | Perovskite | |
| dc.subject.en | Cathodes | |
| dc.subject.en | Oxides | |
| dc.title.en | Hydration properties and rate determining steps of the oxygen reduction reaction of perovskite-related oxides as H+-SOFC cathodes | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1149/2.101205jes | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of The Electrochemical Society | |
| bordeaux.page | B683-B694 | |
| bordeaux.volume | 159 | |
| bordeaux.issue | 6 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00700611 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00700611v1 | |
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