Journal Article

PUBDB-2019-01966

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Coordination Numbers in Sm-Doped Ceria Using X-ray Absorption Spectroscopy

Koettgen, J. (Corresponding author)Extern* ; Martin, M. (Corresponding author)Extern*

2019
ACS Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.jpcc.8b10494  doi:10.3204/PUBDB-2019-01966

Abstract: Sm-doped ceria has one of the highest ionic conductivities reported for rare earth-doped cerium oxides. The high oxygen-ion conductivity can be attributed to the creation of oxygen vacancies by doping and weak defect interactions between oxygen vacancies and dopants. Especially, oxygen vacancies in the nearest neighborhood to dopants decrease the conductivity due to trapping and blocking. In this work, the local structure around the Ce cations is investigated using the extended X-ray absorption fine structure. The resulting coordination numbers of cerium coordinated by oxygen are only marginally larger than in a random oxygen vacancy distribution, explaining the large ionic conductivity.

Note: © American Chemical Society

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Contributing Institute(s):

1. DOOR-User (DOOR)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

Experiment(s):

1. DORIS Beamline C (DORIS III)

Appears in the scientific report 2019

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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