Porous YSZ as a surface oxygen potential probe on polarized electrodes

Tatsuya Kawada, B. A. van Hassel, T. Horita, N. Sakai, H. Yokokawa, M. Dokiya

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A new technique was proposed to study the kinetics of high-temperature electrode reactions. A "porous" zirconia oxygen sensor (POS) was placed on a polarized working electrode, and the oxygen potential was detected on the surface. Its deviation from the gas phase gave information about the reaction between the gas phase and the absorbed species. Several metal electrodes were examined in O2Ar or H2H2OAr atmospheres, and the POS responses were compared. Evidence of a large contribution of the surface reaction to the electrode polarization was observed in some cases, e.g. oxygen on a Pt paste electrode at low temperature, and hydrogen oxidation reaction on a Ni wire electrode. The potentiality of this method for the study of electrode kinetics and surface reactions is demonstrated.

Original languageEnglish
Pages (from-to)65-71
Number of pages7
JournalSolid State Ionics
Volume70-71
Issue numberPART 1
DOIs
Publication statusPublished - 1994 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

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