6533b86cfe1ef96bd12c82c5
RESEARCH PRODUCT
Local Environment of Yttrium in Y-Doped Barium Cerate Compounds
Francesco GianniciAlessandro LongoFrancesca DeganelloAntonino MartoranaAntonella BalernaCarmela Ingraosubject
X-ray absorption spectroscopyMaterials scienceAbsorption spectroscopyDopantGeneral Chemical EngineeringBarium cerate compoundInorganic chemistryDopingAnalytical chemistryX-ray absorption spectroscopychemistry.chemical_elementBariumGeneral MedicineGeneral ChemistryYttriumDistorted octahedronchemistryOctahedronStructural distortionDistortionMaterials Chemistrydescription
The local structure of yttrium in Y-doped BaCeO3 compounds was studied using X-ray absorption spectroscopy (XAS) at the Y K-edge. Data analysis shows that the local environment of Y3+ changes, resulting in a distorted octahedron. The structural distortion found does not depend on the dopant amount at the investigated compositions, but on the level of hydration, as clearly demonstrated by the distortion increase in the BaCe0.9Y0.1O3-ä sample after the treatment in O2/H2O. In situ measurements performed in O2/H2O flux, which show that the distortion is retained at 753 K, are also reported. The observed significative structural changes seem to point out a preferential insertion of the hydroxyls around the dopant in the Y-doped BaCeO3 compounds.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-01-01 | Chemistry of Materials |