Infrared study of high temperature proton conducting Sr(Zr 0.95M0.05III)O3 - δ; fon of MIIIO6-cluster depends on dopant species

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

High temperature proton conductors of 5 at.% Ga-, Sc-, In-, Lu-, Y- and Gd-doped SrZrO3, i.e., Sr(Zr0.95MIII 0.05)O3 - δ, were prepared and subjected to infrared analysis in the O-H stretching vibration, νOH, region using the diffuse reflection technique. The absorption intensities of the νOH bands at ∼ 3300 cm- 1 (band A) and ∼ 3030 cm- 1 (band B) due to MIII-OH-Zr and the bands at ∼ 2450 cm- 1 (band C) and ∼ 1900 cm- 1 (band D) due to MIII-OH-MIII were discussed in terms of the M IIIO6-cluster formation in Sr(Zr0.95M III0.05)O3 - δ. The absorption intensity ratio of (IC + ID)/(IA + IB + I C + ID), which corresponds to the population of protons at the MIII-OH-MIII site to the total protons dissolved, increased since the ionic radius of the dopant MIII was different from that of the host Zr. It was shown experimentally that the structural distortion introduced by this MIII doping was the driving force for MIIIO6-cluster formation.

Original languageEnglish
Pages (from-to)2941-2944
Number of pages4
JournalSolid State Ionics
Volume176
Issue number39-40
DOIs
Publication statusPublished - 2005 Dec 1
Externally publishedYes

Keywords

  • Clustering
  • Infrared spectroscopy
  • Perovskite
  • Proton conductor
  • Solid electrolyte

ASJC Scopus subject areas

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

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