NO2 adsorption behaviour on LaFeO3 electrodes of YSZ-based non-nernstian electrochemical sensors

Jong Won Yoon*, Elisabetta Di Bartolomeo, Enrico Traversa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

X-ray photoelectron spectroscopy (XPS) was used to examine the NO 2 adsorption behaviour on the LaFeO3 and Pt electrodes of planar yttria stabilized zirconia non-Nernstian gas sensors. The electrochemical sensors were exposed to the same gas atmosphere containing 1000 ppm NO 2 at 650°C. XPS of the as-prepared sensors and sensors after exposure to NO2 revealed bonded nitrogen peaks on the surface of the semiconducting oxide but no nitrogen peaks on the Pt electrode. Therefore, NO2 adsorption on a LaFeO3 electrode plays an important role in the NO2 detection mechanism.

Original languageEnglish (US)
Pages (from-to)28-31
Number of pages4
JournalJournal of Electroceramics
Volume26
Issue number1-4
DOIs
StatePublished - Jun 1 2011

Keywords

  • LaFeO
  • Non-nernstian electrochemical sensors
  • XPS
  • YSZ

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering

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