Infrared study of high-temperature proton-conducting aliovalently doped SrZrO3 and BaZrO3 formation of YO6 clusters in Y-doped SrZrO3

Takahisa Omata, Yoshiyuki Noguchi, Shinya Otsuka-Yao-Matsuo

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22 Citations (Scopus)

Abstract

Infrared spectra for the O-H stretching vibration, νOH, region were studied for Sc- and Y-doped SrZrO3 and Y-doped BaZrO 3 ceramics. For Sc-doped SrZrO3 and Y-doped BaZrO 3, two intense νOH bands at ∼ 3300 and ∼ 3030 cm-1 were observed for the low doping level. With increasing doping level, two νOH bands at ∼ 2450 and ∼ 1900 cm-1 appeared in addition to the bands at ∼ 3300 and ∼ 3030 cm-1 and increased their intensities. However, intensities of the bands at ∼ 2450 and ∼ 1900 cm-1 were considerably smaller than those of the bands at ∼ 3300 and ∼ 3030 cm-1. In contrast to Sc-doped SrZrO3, four bands at ∼ 3300, ∼ 3030, ∼ 2450, and ∼ 1900 cm-1 were observed for the low doping level in Y-doped SrZrO3; furthermore, the intensities of the four bands were comparable and independent of Y-doping level. Thus, the two bands at ∼ 3300 and ∼ 3030 cm-1 were attributable to the proton bonded to the oxygen between dopant MIII and the host Zr ions, i.e., M III-OH-Zr. The bands at ∼ 2450 and ∼ 1900 cm-1 were attributed to the proton bonded to the oxygen between the two dopants, i.e., MIII-OH-MIII The present results revealed that dopant Y in SrZrO3 aggregated on an atomic scale and formed the YO6 cluster even for the low doping level.

Original languageEnglish
Pages (from-to)E200-E205
JournalJournal of the Electrochemical Society
Volume152
Issue number6
DOIs
Publication statusPublished - 2005
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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