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An all-solid-state potentiometric SO2 gas sensor with solid reference electrode

An all-solid-state potentiometric SO2 gas sensor with solid reference electrode A SO2 sensor based on Na-β-Al2O3 interfaced with an auxiliary electrode of Na2SO4 formed in-situ and a solid mixture of Fe3O4, Fe2O3, 3Na2O·5Fe2O3 as the reference electrode was developed. The sensor displayed a good response to changes in the partial pressure of SO2 with a linear relationship between the measured emf and the logarithmic values of the partial pressure of SO2, as predicted by the Nernstian equation. Using an electron probe X-ray microanalyser, the formation of a Na2SO4 reaction layer was confirmed on the surface of Na-β-Al2O3 tube due to surface reaction with the SO2 gas. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

An all-solid-state potentiometric SO2 gas sensor with solid reference electrode

Ionics , Volume 9 (6) – Mar 22, 2006

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References (29)

Publisher
Springer Journals
Copyright
Copyright © 2003 by IfI - Institute for Ionics
Subject
Chemistry; Biomedicine general; Analytical Chemistry; Physical Chemistry; Electrochemistry; Optical and Electronic Materials
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/BF02376586
Publisher site
See Article on Publisher Site

Abstract

A SO2 sensor based on Na-β-Al2O3 interfaced with an auxiliary electrode of Na2SO4 formed in-situ and a solid mixture of Fe3O4, Fe2O3, 3Na2O·5Fe2O3 as the reference electrode was developed. The sensor displayed a good response to changes in the partial pressure of SO2 with a linear relationship between the measured emf and the logarithmic values of the partial pressure of SO2, as predicted by the Nernstian equation. Using an electron probe X-ray microanalyser, the formation of a Na2SO4 reaction layer was confirmed on the surface of Na-β-Al2O3 tube due to surface reaction with the SO2 gas.

Journal

IonicsSpringer Journals

Published: Mar 22, 2006

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