Oxygen-vacancy ordering in lanthanide-doped ceria: Dopant-type dependence and structure model

Ou, Ding Rong, Mori, Toshouki, Ye, Fei, Zou, Jin, Auchterlonie, Graeme and Drennan, John (2008) Oxygen-vacancy ordering in lanthanide-doped ceria: Dopant-type dependence and structure model. Physical Review B, 77 2: 024108-024108. doi:10.1103/PhysRevB.77.024108

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Author Ou, Ding Rong
Mori, Toshouki
Ye, Fei
Zou, Jin
Auchterlonie, Graeme
Drennan, John
Title Oxygen-vacancy ordering in lanthanide-doped ceria: Dopant-type dependence and structure model
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
Publication date 2008-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.1103/PhysRevB.77.024108
Open Access Status File (Publisher version)
Volume 77
Issue 2
Start page 024108
End page 024108
Total pages 8
Editor P. D. Adams
Place of publication United States
Publisher American Physical Society
Language eng
Subject C1
970102 Expanding Knowledge in the Physical Sciences
100708 Nanomaterials
291400 Materials Engineering
Abstract Studies of electron energy loss spectroscopy and selected area electron diffraction (SAED) were systematically performed on 15 and 25 at. % lanthanide (Ln)-doped ceria samples (Ln=Sm, Gd, Dy, and Yb), through which the local ordering of oxygen vacancies that develops with increase in doping level was confirmed in the sequence of (Gd,Sm)>Dy>Yb. Furthermore, a monotone correlation between the development of the ordering and the degradation of ionic conductivity with increasing the doping concentration from 15 to 25 at. % was observed. Based on the analysis of SAED patterns, a structural model for the ordering of oxygen vacancies has been constructed, in which the arrangement of oxygen vacancies is similar to that in C-type Ln2O3 oxides and the 110 pairs of the vacancies are preferred. Then, the factors that can influence the formation of the ordering are discussed.
Keyword Energy-loss Spectroscopy
Stabilized Zirconia
Solid Electrolytes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 73 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 25 Mar 2009, 20:02:15 EST by Sally Beard on behalf of Materials