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Mixed potential type hydrogen sensor

Mixed potential type hydrogen sensor The principle of potentiometric hydrogen sensors based on protonic conductors is reviewed. The origin of the potentiometric response in inert gas (Nernst potential) and in air (mixed potential) is discussed. It is shown that the nature of the sensing electrode as well as the morphology influence the mixed potential response. The properties of the solid-state internal reference electrode are also examined and discussed. A H+ reversible electrode based on quinhydrone is described. Then, an example of solid-state potentiometric hydrogen sensor is presented. The device incorporates a protonic polymer electrolyte based on polybenzimidazole, a Pt gas diffusion electrode or a Pt grid as sensing electrode and a reference electrode based on Ag-AgCl. The sensing characteristics in nitrogen and dry air are reported. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Mixed potential type hydrogen sensor

Ionics , Volume 9 (4) – Mar 21, 2006

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References (28)

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/BF02375962
Publisher site
See Article on Publisher Site

Abstract

The principle of potentiometric hydrogen sensors based on protonic conductors is reviewed. The origin of the potentiometric response in inert gas (Nernst potential) and in air (mixed potential) is discussed. It is shown that the nature of the sensing electrode as well as the morphology influence the mixed potential response. The properties of the solid-state internal reference electrode are also examined and discussed. A H+ reversible electrode based on quinhydrone is described. Then, an example of solid-state potentiometric hydrogen sensor is presented. The device incorporates a protonic polymer electrolyte based on polybenzimidazole, a Pt gas diffusion electrode or a Pt grid as sensing electrode and a reference electrode based on Ag-AgCl. The sensing characteristics in nitrogen and dry air are reported.

Journal

IonicsSpringer Journals

Published: Mar 21, 2006

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