Oxygen transport studies in nanocrystalline ceria films

Laxmikant Saraf, C. M. Wang, V. Shutthanandan, Y. Zhang, Olga Marina, D. R. Baer, S. Thevuthasan, P. Nachimuthu, D. W. Lindle

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Oxygen uptake and conductivity were measured by nuclear-reaction analysis and alternating current impedance technique at the intermediate temperature range on sol-gel grown nanocrystalline ceria films with average grain-sizes 7 nm and 38 nm synthesized at 723 and 1173 K, respectively. Higher oxygen uptake and lower ionic conductivity were observed in ceria films with ∼7-nm grain size. High permeation-assisted oxygen diffusion in nanocrystallites combined with oxygen trapping in the disordered region contributed to higher oxygen uptake. However, the lower ionic conductivity in the film resulted from the absence of long-range lattice ordering and inactive grain-boundary/ surface oxygen vacancy sites due to oxygenation. The relationship between oxygen uptake and conductivity in ceria is discussed in details by considering grain-size dependent defect density, related surface area, and enhanced oxygen mobility.

Original languageEnglish
Pages (from-to)1295-1299
Number of pages5
JournalJournal of Materials Research
Volume20
Issue number5
DOIs
Publication statusPublished - May 2005
Externally publishedYes

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Cerium compounds
Oxygen
oxygen
Ionic conductivity
grain size
ion currents
Nanocrystallites
Oxygenation
Nuclear reactions
Defect density
conductivity
Oxygen vacancies
oxygenation
Permeation
Crystal lattices
Sol-gels
nuclear reactions
Grain boundaries
alternating current
grain boundaries

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Saraf, L., Wang, C. M., Shutthanandan, V., Zhang, Y., Marina, O., Baer, D. R., ... Lindle, D. W. (2005). Oxygen transport studies in nanocrystalline ceria films. Journal of Materials Research, 20(5), 1295-1299. https://doi.org/10.1557/JMR.2005.0157

Oxygen transport studies in nanocrystalline ceria films. / Saraf, Laxmikant; Wang, C. M.; Shutthanandan, V.; Zhang, Y.; Marina, Olga; Baer, D. R.; Thevuthasan, S.; Nachimuthu, P.; Lindle, D. W.

In: Journal of Materials Research, Vol. 20, No. 5, 05.2005, p. 1295-1299.

Research output: Contribution to journalArticle

Saraf, L, Wang, CM, Shutthanandan, V, Zhang, Y, Marina, O, Baer, DR, Thevuthasan, S, Nachimuthu, P & Lindle, DW 2005, 'Oxygen transport studies in nanocrystalline ceria films', Journal of Materials Research, vol. 20, no. 5, pp. 1295-1299. https://doi.org/10.1557/JMR.2005.0157
Saraf L, Wang CM, Shutthanandan V, Zhang Y, Marina O, Baer DR et al. Oxygen transport studies in nanocrystalline ceria films. Journal of Materials Research. 2005 May;20(5):1295-1299. https://doi.org/10.1557/JMR.2005.0157
Saraf, Laxmikant ; Wang, C. M. ; Shutthanandan, V. ; Zhang, Y. ; Marina, Olga ; Baer, D. R. ; Thevuthasan, S. ; Nachimuthu, P. ; Lindle, D. W. / Oxygen transport studies in nanocrystalline ceria films. In: Journal of Materials Research. 2005 ; Vol. 20, No. 5. pp. 1295-1299.
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