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Potentiometric Detection of VOCs using Non-Nernstian SmFeO3/Pt/YSZ/Pt Sensors

Published online by Cambridge University Press:  26 February 2011

Laure Chevallier ,
Elisabetta Di Bartolomeo ,
Enrico Traversa ,
Masami Mori  and
Yoshihiko Sadaoka
Laure Chevallier
Affiliation:
chevallier@scienze.uniroma2.it, University of Rome Tor Vergata, Dept. of Chemical Science and Technology, via della Ricerca Scientifica 1, Rome, I-00133, Italy
Elisabetta Di Bartolomeo
Affiliation:
dibartolomeo@uniroma2.it, University of Rome Tor Vergata, Dept. of Chemical Science and Technology, via della Ricerca Scientifica 1, Rome, I-00133, Italy
Enrico Traversa
Affiliation:
traversa@uniroma2.it, University of Rome Tor Vergata, Dept. of Chemical Science and Technology, via della Ricerca Scien tifica 1, Rome, I-00133, Italy
Masami Mori
Affiliation:
hakka-02@eng.ehime-u.ac.jp, Graduate School of Science and Engineering, Ehime University, Dept. of Materials Science and Biotechnology, Bunkyo-cho, Matsuyama, 790-8577, Japan
Yoshihiko Sadaoka
Affiliation:
sadaoka@eng.ehime-u.ac.jp, Graduate School of Science and Engineering, Ehime University, Dept. of Materials Science and Biotechnology, Bunkyo-cho, Matsuyama, 790-8577, Japan
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Abstract

Electrochemical sensors for Volatile Organic Compound (VOCs) based on commercial YSZ layers were fabricated using Pt as reference electrode and SmFeO3 perovskite oxide as a sensing electrode, both exposed to the same gas environment. Pt was sputtered on YSZ layers while SmFeO3 p-type semiconducting oxide was deposited by electrophoretic deposition (EPD). Nanometric SmFeO3 oxide powders were selected because they have already shown good sensing performance in semiconducting sensors for oxidizing gases such as NO2 and ozone, and reducing gases, such as VOCs. Potentiometric measurements were performed under exposure to different concentrations of VOCs such as: methyl ethyl ketone (MEK), ethanol (EtOH) and acetic acid (AA). The best gas sensing response was obtained at 400°C.

Keywords

sensoroxideelectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA12-03
Copyright
Copyright © Materials Research Society 2007

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