High temperature detection of CO/HCs gases by non-Nernstian planar sensors using Nb2O5 electrode

Laure Chevallier; Elisabetta Di Bartolomeo; Maria Luisa Grilli; Enrico Traversa

doi:10.1016/j.snb.2007.09.056

High temperature detection of CO/HCs gases by non-Nernstian planar sensors using Nb₂O₅ electrode

Laure Chevallier^*, Elisabetta Di Bartolomeo, Maria Luisa Grilli, Enrico Traversa

^*Corresponding author for this work

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

33 Scopus citations

Abstract

In this work, high temperature planar sensors based on tape-cast YSZ layers with Nb₂O₅ n-type semiconducting oxide as sensing electrode were studied. The investigated gases were CO and different saturated and unsaturated hydrocarbons. A study on the presence of the metallic electrode under the metal oxide and on the nature of that metallic (Pt or Au) electrode was performed. Thus, different types of sensors were prepared and investigated. The sensors were tested in potentiometric devices at various concentrations of gases in the 500-700 °C temperature range. The most promising sensor in terms of selectivity, sensitivity and stability was Pt/YSZ/Nb₂O₅, without any metallic electrode under the Nb₂O₅ powder. In fact, this sensor was found totally selective to propylene with very large EMF response even at temperature as high as 700 °C (-115 mV/decade).

Original language	English (US)
Pages (from-to)	514-519
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	130
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2007.09.056
State	Published - Mar 14 2008
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the Ministry of Education, University and Research (MIUR) of Italy (FIRB Project).

Keywords

Electrical properties
HCs sensors
Niobia electrode
YSZ

ASJC Scopus subject areas

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

Access to Document

10.1016/j.snb.2007.09.056

Cite this

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title = "High temperature detection of CO/HCs gases by non-Nernstian planar sensors using Nb2O5 electrode",

abstract = "In this work, high temperature planar sensors based on tape-cast YSZ layers with Nb2O5 n-type semiconducting oxide as sensing electrode were studied. The investigated gases were CO and different saturated and unsaturated hydrocarbons. A study on the presence of the metallic electrode under the metal oxide and on the nature of that metallic (Pt or Au) electrode was performed. Thus, different types of sensors were prepared and investigated. The sensors were tested in potentiometric devices at various concentrations of gases in the 500-700 °C temperature range. The most promising sensor in terms of selectivity, sensitivity and stability was Pt/YSZ/Nb2O5, without any metallic electrode under the Nb2O5 powder. In fact, this sensor was found totally selective to propylene with very large EMF response even at temperature as high as 700 °C (-115 mV/decade).",

keywords = "Electrical properties, HCs sensors, Niobia electrode, YSZ",

author = "Laure Chevallier and {Di Bartolomeo}, Elisabetta and Grilli, {Maria Luisa} and Enrico Traversa",

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AU - Chevallier, Laure

AU - Di Bartolomeo, Elisabetta

AU - Grilli, Maria Luisa

AU - Traversa, Enrico

N1 - Funding Information: This work was supported by the Ministry of Education, University and Research (MIUR) of Italy (FIRB Project).

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Y1 - 2008/3/14

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AB - In this work, high temperature planar sensors based on tape-cast YSZ layers with Nb2O5 n-type semiconducting oxide as sensing electrode were studied. The investigated gases were CO and different saturated and unsaturated hydrocarbons. A study on the presence of the metallic electrode under the metal oxide and on the nature of that metallic (Pt or Au) electrode was performed. Thus, different types of sensors were prepared and investigated. The sensors were tested in potentiometric devices at various concentrations of gases in the 500-700 °C temperature range. The most promising sensor in terms of selectivity, sensitivity and stability was Pt/YSZ/Nb2O5, without any metallic electrode under the Nb2O5 powder. In fact, this sensor was found totally selective to propylene with very large EMF response even at temperature as high as 700 °C (-115 mV/decade).

KW - Electrical properties

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KW - Niobia electrode

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