Enhancement of oxygen surface exchange at the hetero-interface of (La,Sr) CoO3 / (La,Sr) 2 CoO4 with PLD-layered films

M. Sase, F. Hermes, K. Yashiro, K. Sato, J. Mizusaki, T. Kawada, N. Sakai, H. Yokokawa

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84 Citations (Scopus)

Abstract

The preferential site for oxygen isotope exchange was investigated on layered films of La2-x Srx CoO4 (x=0.5,1.0) / La0.6 Sr0.4 CoO3 prepared by pulsed laser deposition (PLD) on a polycrystalline Ce0.9 Gd0.1 O1.95. An isotope exchange experiment was performed at 773 K in O 18 -enriched oxygen of 0.2× 105 Pa. Three-dimensional imaging of secondary ion mass spectrometry (SIMS) was carried out to visualize the isotope distribution. The SIMS images suggested that there are fast oxygen-incorporation paths along the hetero-phase interface of La2-x Srx CoO4 / La0.6 Sr0.4 CoO3. The results have reproduced our former findings on the fast oxygen surface exchange with La2-x Srx CoO4 / La0.6 Sr0.4 CoO3 composite polycrystals.

Original languageEnglish
Pages (from-to)B793-B797
JournalJournal of the Electrochemical Society
Volume155
Issue number8
DOIs
Publication statusPublished - 2008

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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