A theoretical framework for prediction of solid state potentiometric gas sensor behavior

B. M. White*, E. R. Macam, F. M. Van Assche, Enrico Traversa, E. D. Wachsman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

A 3 electrode, Luggin's Probe configuration was employed in making D. C. polarization and open-circuit potential (OCP) measurements on Platinum and La2CuO4 electrodes in atmospheres containing O 2, NO, NO2, CO and CO2 at 500°C. Each electrode potential, referenced to an isolated embedded reference electrode, changed when exposed to the aforementioned gases and the differences summed to equal the sensor signals previously seen when both electrodes were exposed to the same environment. Both the La2CuO4 and Pt electrode potentials went down when exposed to reducing gases (NO and CO) and went up when exposed to oxidizing gases (O2 and NO2). The Pt responses (AOCP) were larger than those for La2CuO4 for all gases. La2CuO4|YSZ|Pt sensors responded positively to NO and CO, negatively to NO2 and negligibly to O2. The D.C. polarization behavior for the Pt and La2CuO4 electrodes were contrasted and related to their individual gas responses (ΔOCPs). copyright The Electrochemical Society.

Original languageEnglish (US)
Title of host publicationChemical Sensors 7 -and- MEMS/NEMS 7
PublisherElectrochemical Society Inc.
Pages179-194
Number of pages16
Edition10
ISBN (Electronic)9781607685395
DOIs
StatePublished - Jan 1 2006
EventChemical Sensors 7 -and- MEMS/NEMS 7 - 210th Electrochemical Society Meeting - Cancun, Mexico
Duration: Oct 29 2006Nov 3 2006

Publication series

NameECS Transactions
Number10
Volume3
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherChemical Sensors 7 -and- MEMS/NEMS 7 - 210th Electrochemical Society Meeting
CountryMexico
CityCancun
Period10/29/0611/3/06

ASJC Scopus subject areas

  • Engineering(all)

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