Ir-YSZ nano-composite electrodes for oxygen sensors

Teiichi Kimura, Takashi Goto

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Iridium (Ir)-yttrium-stabilized zirconia (YSZ) nano-composite electrodes were prepared by MOCVD, and their electrode properties were examined. Ir-YSZ nano-composite electrodes consisted of amorphous YSZ and Ir particles of 5-10 nm in diameter. The interfacial conductivity for the Ir-YSZ electrodes was almost 1000 times higher than that of sputtered-Pt electrodes due to large contact area between YSZ and Ir in nano-composite electrodes and high catalytic activity of Ir nano-particles. The electro-motive-force values of the oxygen concentration cell constructed from the Ir-YSZ electrodes and YSZ electrolyte showed the Nernstian theoretical response within 10-0020 s at 650 °C.

Original languageEnglish
Pages (from-to)36-39
Number of pages4
JournalSurface and Coatings Technology
Volume198
Issue number1-3 SPEC. ISS.
DOIs
Publication statusPublished - 2005 Aug 1

Keywords

  • AC impedance
  • Catalytic activity
  • Electrode
  • Iridium
  • Organometallic CVD
  • Oxygen sensor

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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