Non-nernstian electrochemical sensors with a electrode for engine exhaust monitoring

Laure Chevallier*, Stefano Cordiner, Enrico Traversa, Elisabetta Di Bartolomeo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Non-Nernstian electrochemical planar sensors with a Pt electrode and a sensing electrode made using Nb2 O5 powders were fabricated. Two cell configurations were compared, one with and the other without Pt paste under the metal oxide electrode. The sensors were tested both in laboratory and in situ (i.e., downstream of a three-way catalytic converter of a FIAT fire 1242 c.c. spark ignition engine). The best sensing performance, both in the laboratory and at the engine bench, was obtained for the yttria-stabilized zirconia Pt ∫YSZ∫ Nb2 O5 cell, without Pt below the oxide electrode. For this sensor configuration, very large electromotive force response values were obtained for hydrocarbon exposure both in the laboratory and in field tests, even at temperatures as large as 700°C.

Original languageEnglish (US)
JournalJournal of the Electrochemical Society
Volume156
Issue number1
DOIs
StatePublished - Jan 1 2009

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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