Observation of dopant effects on hydrogen modes in SrCe0.95M0.05HxO3-δ by neutron vibrational spectroscopy

C. Karmonik, T. J. Udovic, R. L. Paul, J. J. Rush, K. Lind, R. Hempelmann

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

The influence of different dopants on the hydrogen dynamics in the high-temperature protonic conductor based on strontium cerate was investigated by means of neutron vibrational spectroscopy. The differences in the vibrational spectra up to an energy transfer of 130 meV are discussed. The results indicate the presence of a considerable amount of hydrogen associated with the dopant. The corresponding OH vibrational modes were found to depend strongly on the radius of the dopant cation. Moreover, a temperature study revealed a delocalization of the dopant-related hydrogen near 200 K and above.

Original languageEnglish (US)
Pages (from-to)207-211
Number of pages5
JournalSolid State Ionics
Volume109
Issue number3-4
DOIs
StatePublished - Jun 2 1998

Keywords

  • Defect interactions
  • Electroceramics
  • Neutron vibrational spectroscopy
  • Proton conductors
  • Strontium cerate

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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