Planar electrochemical sensors based on tape-cast YSZ layers and oxide electrodes

Elisabetta Di Bartolomeo; Narin Kaabbuathong; Maria Luisa Grilli; Enrico Traversa

doi:10.1016/j.ssi.2004.05.003

Planar electrochemical sensors based on tape-cast YSZ layers and oxide electrodes

Elisabetta Di Bartolomeo^*, Narin Kaabbuathong, Maria Luisa Grilli, Enrico Traversa

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

97 Scopus citations

Abstract

Electrochemical planar sensors based on yttria-stabilized zirconia (YSZ) with semiconducting oxides (WO₃ and LaFeO₃) and mixed conductors (La_0.8Sr_0.2FeO₃) as sensing electrodes were investigated. The electromotive force (EMF) of the sensors was measured at fixed temperature (450-700 °C) and different concentrations of NO₂ and CO in air in the range 20-1000 ppm. The sensors were wholly exposed to the same gas atmosphere, alternatively air and different gases in air, without using reference air. Fast and stable response was measured for all the different sensors. The EMF of p- and n-type semiconducting-based sensors was measured in opposite directions upon the same gas exposure. These results obtained for the response of planar sensors with different semiconductor sensing electrodes showed that the sensing mechanism cannot be explained by mixed potential theory. The response of these sensors is better described by a differential electrode equilibria sensing mechanism.

Original language	English (US)
Pages (from-to)	173-181
Number of pages	9
Journal	Solid State Ionics
Volume	171
Issue number	3-4
DOIs	https://doi.org/10.1016/j.ssi.2004.05.003
State	Published - Jul 30 2004
Externally published	Yes

Keywords

Automobile applications
Electrochemical gas sensors
NO and CO gases
Semiconducting oxides
Yttria-stabilized zirconia (YSZ)

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Materials Science

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@article{9159ab4236d643f68943504a2a0f2cca,

title = "Planar electrochemical sensors based on tape-cast YSZ layers and oxide electrodes",

abstract = "Electrochemical planar sensors based on yttria-stabilized zirconia (YSZ) with semiconducting oxides (WO3 and LaFeO3) and mixed conductors (La0.8Sr0.2FeO3) as sensing electrodes were investigated. The electromotive force (EMF) of the sensors was measured at fixed temperature (450-700 °C) and different concentrations of NO2 and CO in air in the range 20-1000 ppm. The sensors were wholly exposed to the same gas atmosphere, alternatively air and different gases in air, without using reference air. Fast and stable response was measured for all the different sensors. The EMF of p- and n-type semiconducting-based sensors was measured in opposite directions upon the same gas exposure. These results obtained for the response of planar sensors with different semiconductor sensing electrodes showed that the sensing mechanism cannot be explained by mixed potential theory. The response of these sensors is better described by a differential electrode equilibria sensing mechanism.",

keywords = "Automobile applications, Electrochemical gas sensors, NO and CO gases, Semiconducting oxides, Yttria-stabilized zirconia (YSZ)",

author = "{Di Bartolomeo}, Elisabetta and Narin Kaabbuathong and Grilli, {Maria Luisa} and Enrico Traversa",

year = "2004",

month = jul,

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doi = "10.1016/j.ssi.2004.05.003",

language = "English (US)",

volume = "171",

pages = "173--181",

journal = "Solid State Ionics",

issn = "0167-2738",

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AU - Di Bartolomeo, Elisabetta

AU - Kaabbuathong, Narin

AU - Grilli, Maria Luisa

AU - Traversa, Enrico

PY - 2004/7/30

Y1 - 2004/7/30

N2 - Electrochemical planar sensors based on yttria-stabilized zirconia (YSZ) with semiconducting oxides (WO3 and LaFeO3) and mixed conductors (La0.8Sr0.2FeO3) as sensing electrodes were investigated. The electromotive force (EMF) of the sensors was measured at fixed temperature (450-700 °C) and different concentrations of NO2 and CO in air in the range 20-1000 ppm. The sensors were wholly exposed to the same gas atmosphere, alternatively air and different gases in air, without using reference air. Fast and stable response was measured for all the different sensors. The EMF of p- and n-type semiconducting-based sensors was measured in opposite directions upon the same gas exposure. These results obtained for the response of planar sensors with different semiconductor sensing electrodes showed that the sensing mechanism cannot be explained by mixed potential theory. The response of these sensors is better described by a differential electrode equilibria sensing mechanism.

AB - Electrochemical planar sensors based on yttria-stabilized zirconia (YSZ) with semiconducting oxides (WO3 and LaFeO3) and mixed conductors (La0.8Sr0.2FeO3) as sensing electrodes were investigated. The electromotive force (EMF) of the sensors was measured at fixed temperature (450-700 °C) and different concentrations of NO2 and CO in air in the range 20-1000 ppm. The sensors were wholly exposed to the same gas atmosphere, alternatively air and different gases in air, without using reference air. Fast and stable response was measured for all the different sensors. The EMF of p- and n-type semiconducting-based sensors was measured in opposite directions upon the same gas exposure. These results obtained for the response of planar sensors with different semiconductor sensing electrodes showed that the sensing mechanism cannot be explained by mixed potential theory. The response of these sensors is better described by a differential electrode equilibria sensing mechanism.

KW - Automobile applications

KW - Electrochemical gas sensors

KW - NO and CO gases

KW - Semiconducting oxides

KW - Yttria-stabilized zirconia (YSZ)

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U2 - 10.1016/j.ssi.2004.05.003

DO - 10.1016/j.ssi.2004.05.003

M3 - Article

AN - SCOPUS:3242759996

SN - 0167-2738

VL - 171

SP - 173

EP - 181

JO - Solid State Ionics

JF - Solid State Ionics

IS - 3-4

ER -

Planar electrochemical sensors based on tape-cast YSZ layers and oxide electrodes

Abstract

Keywords

ASJC Scopus subject areas

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