http://www.cnr.it/ontology/cnr/individuo/prodotto/ID329448
Structural Features of Sm-and Gd-Doped Ceria Studied by Synchrotron X-ray Diffraction and µ-Raman Spectroscopy (Articolo in rivista)
- Type
- Label
- Structural Features of Sm-and Gd-Doped Ceria Studied by Synchrotron X-ray Diffraction and µ-Raman Spectroscopy (Articolo in rivista) (literal)
- Anno
- 2015-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/acs.inorgchem.5b00395 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Artini C. ; Pani M.; Carnasciali M. M.; Buscaglia M. T.; Plaisier J. R.; Costa G. A. (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://pubs.acs.org/doi/pdf/10.1021/acs.inorgchem.5b00395 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1-3,6 : DCCI, Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, 16146 Genova, Italy/
1,4 : CNR-IENI, Via De Marini 6, 16149 Genova, Italy /
2,6 : CNR-SPIN Genova, Corso Perrone 24, 16152 Genova, Italy /
3 : INSTM, Genova Research Unit, Via Dodecaneso 31, 16146 Genova, Italy /
5 : Elettra - Sincrotrone Trieste S.C.p.A., ss 14, km 163.5, 34149 Basovizza, Trieste, Italy (literal)
- Titolo
- Structural Features of Sm-and Gd-Doped Ceria Studied by Synchrotron X-ray Diffraction and µ-Raman Spectroscopy (literal)
- Abstract
- A structural study of Sm- and Gd-doped ceria was performed with the aim to clarify some unexplained structural features. (Ce1-xREx)O2-x/2 samples (RE ? Sm, Gd; x = 0, 0.1, ..., 1) were prepared by coprecipitation of mixed oxalates and subsequent thermal treatment at 1473, 1173, or 1073 K in air; they were then analyzed at room temperature both by synchrotron X-ray diffraction and ?-Raman spectroscopy. Two structural models were adopted to fit the experimental data, namely, a fluoritic one, resembling the CeO2 structure at low RE content, and a hybrid one at higher RE content, intermediate between the CeO2 and the RE2O3 structures. Two main transitions were detected along the compositional range: (a) an RE-dependent transition at the boundary between the fluoritic and the hybrid regions, of a chemical nature; (b) an RE-independent transition within the hybrid region at ~0.5, having a purely geometrical nature. The presence of two finely interlaced F- and C-based structures within the hybrid region was confirmed, and hints of their composition were obtained by ?-Raman spectroscopy. The obtained results indicate a possible explanation for the non-Vegard behavioral trend of the cell parameters. (literal)
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