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Influence of crystal orientation and annealing on the oxygen diffusion and surface exchange of La2NiO4+d

hal.structure.identifierLaboratoire des matériaux et du génie physique [LMGP ]
dc.contributor.authorBURRIEL, Mónica
hal.structure.identifierInternational Institute for Carbon-Neutral Energy Research [WPI-I2CNER]
dc.contributor.authorTÉLLEZ, Helena
hal.structure.identifierDepartment of Materials
dc.contributor.authorCHATER, Richard J.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierDepartment of Materials
dc.contributor.authorCASTAING, Rémi
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVEBER, Philippe
hal.structure.identifierGREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN]
dc.contributor.authorZAGHRIOUI, Mustapha
hal.structure.identifierInternational Institute for Carbon-Neutral Energy Research [WPI-I2CNER]
dc.contributor.authorISHIHARA, Tatsumi
hal.structure.identifierDepartment of Materials
dc.contributor.authorKILNER, John A.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc.
dc.date.issued2016
dc.identifier.issn1932-7447
dc.description.abstractEnLa2NiO4+δ is a mixed ionic–electronic conducting material with the 2D K2NiF4-type structure garnering much interest as a potential intermediate-temperature solid-oxide fuel cell (IT-SOFC) cathode. The oxygen diffusion along the ab-plane exhibiting the highest oxygen ionic conductivity governs the behavior of the bulk materials in this family of oxides. The oxygen surface exchange processes, however, are not well-understood and large differences in the surface exchange coefficient (k*) values can be found in the literature for this and other cathode materials. The isotopic exchange depth profiling (IEDP) technique was used in combination with low energy ion scattering (LEIS) measurements on two sets of La2NiO4+δ single crystals with precisely cut crystal faces but different thermal histories. For each set of single crystals, the oxygen diffusion and surface exchange coefficient were evaluated for two different orientations in the temperature range of 450–600 °C. The differences in k* have been correlated with differences in surface chemistry: surface termination, near-surface rearrangement, and the presence of extrinsic impurities. Finally, the predominant La termination at the immediate outer surface is evidenced, confirming recent results for other Ruddlesden–Popper phases with mixed ionic–electronic conducting properties.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enInfluence of crystal orientation and annealing on the oxygen diffusion and surface exchange of La2NiO4+d
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.jpcc.6b05666
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Physical Chemistry C
bordeaux.page17927-17938
bordeaux.volume120
bordeaux.issue32
bordeaux.peerReviewedoui
hal.identifierhal-01377151
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01377151v1
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