The NO2 response of solid electrolyte sensors made using nano-sized LaFeO3 electrodes

Jong Won Yoon, Maria Luisa Grilli, Elisabetta Di Bartolomeo, Riccardo Polini, Enrico Traversa*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

112 Scopus citations

Abstract

Electrochemical cells were prepared coupling an oxygen ionic conductor (Y2O3-stabilized ZrO2:YSZ) with a semiconducting oxide (LaFeO3) electrode. Pt was used as the counter electrode. These devices showed promising NO2 sensing performance at 400 and 450°C. The electromotive force (EMF) value of the (Pt)LaFeO3/YSZ/Pt sensor increased in NO2 atmospheres with a fast response time. The polarization curves showed non-linear behavior in air and NO2. The non-linearity was attributed to the potential drop at the electrode interfaces. Electrochemical impedance spectroscopy (EIS) analysis of the devices showed that the resistance and reactance at the electrolyte/electrode interface decreased upon introduction of 100 ppm NO2 in air, because of a lower electrode overvoltage.

Original languageEnglish (US)
Pages (from-to)483-488
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume76
Issue number1-3
DOIs
StatePublished - Jun 1 2001
EventProceeding of the 8th International Meeting on Chemical Sensors - Basel, Switzerland
Duration: Jul 2 2000Jul 5 2000

Keywords

  • Electrochemical impedance spectroscopy
  • Electrochemical sensors
  • LaFeO
  • Mixed potential
  • NO
  • Yttria-stabilized zirconia

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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