The local structure of yttrium in Y-doped BaCeO3 compounds was studied using X-ray absorptionspectroscopy (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 amountat the investigated compositions, but on the level of hydration, as clearly demonstrated by the distortionincrease in the BaCe0.9Y0.1O3-ä sample after the treatment in O2/H2O. In situ measurements performedin O2/H2O flux, which show that the distortion is retained at 753 K, are also reported. The observedsignificative structural changes seem to point out a preferential insertion of the hydroxyls around thedopant in the Y-doped BaCeO3 compounds.
|Numero di pagine||7|
|Rivista||Chemistry of Materials|
|Stato di pubblicazione||Published - 2006|
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