ISIS Neutron and Muon Source Data Journal

Effect of ionic radius on local structure in lanthanide doped cerias

Abstract: Doped cerias are currently being used as oxide ion conducting electrolytes in intermediate temperature solid oxide fuel cells (SOFCs). Differences have been found in the local structures of neodymium doped ceria and gadolinium doped ceria, which we suspect are due to a small difference in the proximity of the ionic radii of Nd3+ and Gd3+ to the so called ?critical radius? of 1.038 Å. Through reverse Monte Carlo analysis of total neutron scattering data, it is proposed to carefully study the local structures of lanthanum doped ceria and ytterbium doped ceria, where the dopant cations are respectively much larger than and much smaller than Nd3+ and Gd3+. In particular the effect of these dopants on dopant-vacancy association and vacancy pair ordering will be evaluated along with how such features change with temperature. The results of the study will help in the understanding the influences of small changes in local structure on ionic conductivity in such fluorite-based electrolytes.

Principal Investigator: Dr Isaac Abrahams
Experimenter: Professor Franciszek Krok
Experimenter: Dr Marzena Leszczy?ska-Redek
Experimenter: Dr Steve Hull
Local Contact: Dr Ronald Smith
Experimenter: Miss Jing Ming

DOI: 10.5286/ISIS.E.RB2510256

ISIS Experiment Number: RB2510256

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Isaac Abrahams et al; (2025): Effect of ionic radius on local structure in lanthanide doped cerias, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2510256

Data is released under the CC-BY-4.0 license.