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In-situ study of cationic oxidation states in Pr2NiO4+δ using X-ray absorption near-edge spectroscopy

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorOGIER, Tiphaine
hal.structure.identifierInstitut des Sciences Chimiques de Rennes [ISCR]
dc.contributor.authorPRESTIPINO, Carmelo
hal.structure.identifierEuropean Synchrotron Radiation Facility [ESRF]
dc.contributor.authorFIGUEROA, Santiago
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAUVY, Fabrice
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
dc.contributor.authorMOUGIN, Julie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGRENIER, Jean-Claude
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMOURGUES, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc.
dc.date.issued2019-07
dc.identifier.issn0009-2614
dc.description.abstractEnThe mean oxidation state of cationic elements in Pr2NiO4+δ was studied using XANES measurements versus temperature in air. Unexpectedly, praseodymium is solely found as Pr3+ while Pr4+ was also foreseeable. Pr3+ cation is well accommodated in the large rare-earth site with the nine-fold coordination in this K2NiF4 – T-type structure; conversely, the small size of the Pr4+ cation seems not compatible with this site. Moreover, XANES measurements show a progressive decrease of the mean oxidation state of nickel ions when the temperature increases. It is directly correlated to the decrease of the oxygen over-stoichiometry of the material evidenced by TGA measurements.
dc.description.sponsorshipFIabilisation De l'ELectrolYse de l'eau à haute température pour la production d'Hydrogène - ANR-09-HPAC-0005
dc.language.isoen
dc.publisherElsevier
dc.subject.enoxidation states
dc.subject.enPr L III -edge
dc.subject.enNi K-edge
dc.subject.enSOEC
dc.subject.enSOFC
dc.subject.enpraseodymium nickelate
dc.subject.enK 2 NiF 4 -T-type structure
dc.subject.enXANES
dc.title.enIn-situ study of cationic oxidation states in Pr2NiO4+δ using X-ray absorption near-edge spectroscopy
dc.typeArticle de revue
dc.identifier.doi10.1016/j.cplett.2019.04.034
dc.subject.halChimie/Matériaux
dc.subject.halChimie/Chimie théorique et/ou physique
dc.subject.halChimie/Chimie inorganique
bordeaux.journalChemical Physics Letters
bordeaux.page116-120
bordeaux.volume727
bordeaux.peerReviewedoui
hal.identifierhal-02123100
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02123100v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemical%20Physics%20Letters&rft.date=2019-07&rft.volume=727&rft.spage=116-120&rft.epage=116-120&rft.eissn=0009-2614&rft.issn=0009-2614&rft.au=OGIER,%20Tiphaine&PRESTIPINO,%20Carmelo&FIGUEROA,%20Santiago&MAUVY,%20Fabrice&MOUGIN,%20Julie&rft.genre=article


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