Rahayu, S, Forrester, JS, Kale, GM orcid.org/0000-0002-3021-5905 et al. (1 more author) (2018) Promising solid electrolyte material for an IT-SOFC: Crystal structure of the cerium gadolinium holmium oxide Ce₀.₈Gd₀.₁Ho₀.₁O₁.₉ between 295 and 1023 K. Acta Crystallographica Section C: Structural Chemistry, 74 (2). 1811682. pp. 236-239.
Abstract
The crystal structure of Ce₀.₈Gd₀.₁Ho₀.₁O₁.₉ (cerium gadolinium holmium oxide) has been determined from powder X-ray diffraction data. This is a promising material for application as a solid electrolyte for intermediateerature solid oxide fuel cells (IT-SOFCs). Nanoparticles were prepared using a novel sodium alginate sol-gel method, where the sodium ion was exchanged with ions of interest and, after washing, the gel was calcined at 723'K in air. The crystallographic features of Gd and Ho co-doped cerium oxide were investigated around the desired operating temperatures of IT-SOFCs, i.e. 573 ≤ T ≤ 1023 K. We find that the crystal structure is a stable fluorite structure with the space group Fmm in the entire temperature range. In addition, the trend in lattice parameters shows that there is a monotonic increase with increasing temperature.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 International Union of Crystallography. This is an author produced version of a paper published in Acta Crystallographica Section C: Structural Chemistry. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | intermediate-temperature solid oxide fuel cells; co-doping; fluorite; rare earth oxides; powder diffraction; crystal structure; IT-SOFC; holmium; gadolinium; cerium; solid electrolyte; in situ X-ray diffraction. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Feb 2018 16:45 |
Last Modified: | 28 Mar 2018 22:39 |
Status: | Published |
Publisher: | International Union of Crystallography |
Identification Number: | 10.1107/S2053229617017946 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:127754 |