Study of YSZ-based electrochemical sensors with oxide electrodes for high temperature applications

A. Dutta, N. Kaabbuathong, M. L. Grilli, E. Di Bartolomeo*, Enrico Traversa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Potentiometric sensors based on yttria stabilized zirconia (YSZ) with WO3 as sensing electrode were fabricated using either Pt or Au electrodes. The sensors were studied in the temperature range 550-700°C in the presence of different concentrations (300-1000 ppm) of NO2 and CO in air. The response to NO2 was very stable with fast response time (20-40 s). The best sensitivity (18.8 mV/decade) using Pt electrodes was observed at 600°C. At the same temperature a cross-sensitivity (-15 mV/decade) to CO gas was also noticed. The response to CO was decreased (-4 mV/decade) using Au electrode. The role played by WO3 on the sensing electrode was discussed.

Original languageEnglish (US)
Pages (from-to)451-453
Number of pages3
JournalBulletin of Materials Science
Volume25
Issue number6
DOIs
StatePublished - Jan 1 2002

Keywords

  • Gas sensors
  • Oxide electrode
  • YSZ

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials

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