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dc.contributor.authorBergerud, Amy
dc.contributor.authorSelbach, Sverre Magnus
dc.contributor.authorMilliron, Delia J.
dc.date.accessioned2017-11-13T14:21:30Z
dc.date.available2017-11-13T14:21:30Z
dc.date.created2016-08-25T03:37:14Z
dc.date.issued2016
dc.identifier.citationACS Nano. 2016, 10 (6), 6147-6155.nb_NO
dc.identifier.issn1936-0851
dc.identifier.urihttp://hdl.handle.net/11250/2465959
dc.description.abstractA new, metastable polymorph of V2O3 with a bixbyite structure was recently stabilized in colloidal nanocrystal form. Here, we report the reversible incorporation of oxygen in this material, which can be controlled by varying temperature and oxygen partial pressure. Based on X-ray diffraction (XRD) and thermogravimetric analysis, we find that oxygen occupies interstitial sites in the bixbyite lattice. Two oxygen atoms per unit cell can be incorporated rapidly and with minimal changes to the structure while the addition of three or more oxygen atoms destabilizes the structure, resulting in a phase change that can be reversed upon oxygen removal. Density functional theory (DFT) supports the reversible occupation of interstitial sites in bixbyite by oxygen, and the 1.1 eV barrier to oxygen diffusion predicted by DFT matches the activation energy of the oxidation process derived from observations by in situ XRD. The observed rapid oxidation kinetics are thus facilitated by short diffusion paths through the bixbyite nanocrystals. Due to the exceptionally low temperatures of oxidation and reduction, this earth-abundant material is proposed for use in oxygen storage applications.nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Chemical Societynb_NO
dc.titleOxygen Incorporation and Release in Metastable Bixbyite V2O3 Nanocrystalsnb_NO
dc.typeJournal articlenb_NO
dc.description.versionsubmittedVersionnb_NO
dc.source.pagenumber6147-6155nb_NO
dc.source.volume10nb_NO
dc.source.journalACS Nanonb_NO
dc.source.issue6nb_NO
dc.identifier.doi10.1021/acsnano.6b02093
dc.identifier.cristin1375315
dc.relation.projectNotur/NorStore: NN9264Knb_NO
dc.description.localcodeThis is a submitted manuscript of an article published by American Chemical Society in ACS Nano, May 26, 2016nb_NO
cristin.unitcode194,66,35,0
cristin.unitnameInstitutt for materialteknologi
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode1


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