Structure Specificity of Nanocrystalline Praseodymia Doped Ceria

MRS Online Proceedings Library volume 848, pages276–281(2004)Cite this article

Abstract

The features of the structure of nanorystalline Ce1-xPrxO2-y system (0 ≤ × ≤ 0.5) prepared via a complex polymerized precursor (Pechini) route have been elucidated by using a combination of spectroscopic (XANES, XPS) and structural (TEM, neutron diffraction) methods. Within the studied range of composition, the structure of all samples air annealed at 500 °C corresponds to single-phase fluorite-like solid solution. The relative content of Pr3+ both in the bulk and in the surface layer appears to be as high as 20–50%. The Rietveld refinement revealed non-monotonous variation of structural parameters (lattice parameter, domain size, microstrain density, Ce-O and O-O distances) and residual lattice hydroxyls concentration with Pr content. Clustering of defects along with variation of the mean Pr cation radius/charge state and disordering of the surface layer/ domain boundaries appear to be responsible for the observed features.

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Acknowledgments

This work is in part supported by the INTAS 01-2162, ISTC 2529, RFBR 03-03-32340a Projects and Integration Projects 39 and 110 of SB RAS. The DAAD postdoctoral research fellowship to H.B. is also gratefully acknowledged.

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Affiliations

  1. Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

    Vladislav A. Sadykov, Yu. V. Frolova, V.V. Kriventsov, D.I. Kochubei, V. I. Zaikovskii & H. Borchert

  2. Institute of Metals Physics, Ural Branch of RAS, Ekaterinburg, Russia

    V.I. Voronin

  3. Chemical Department of Ural State University, Ekaterinburg, Russia

    A. N. Petrov

  4. Institute of Chemical Engineering & High Temperature Processes, Patras, Greece

    S. Neophytides

Authors
  1. Vladislav A. Sadykov
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  2. V.I. Voronin
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  3. A. N. Petrov
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  4. Yu. V. Frolova
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  5. V.V. Kriventsov
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  6. D.I. Kochubei
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  7. V. I. Zaikovskii
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  8. H. Borchert
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  9. S. Neophytides
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Correspondence to Vladislav A. Sadykov.

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Sadykov, V.A., Voronin, V., Petrov, A.N. et al. Structure Specificity of Nanocrystalline Praseodymia Doped Ceria. MRS Online Proceedings Library 848, 276–281 (2004). https://doi.org/10.1557/PROC-848-FF5.2.1/K5.2

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