Steady-state model of a zirconia oxygen sensor in a simple gas mixture

The theory of gas sensors developed previously is used to analyze in detail the response of a zirconia oxygen sensor exposed to a mixture containing oxygen and a single reducing gas such as CO or hydrogen. Results for changes in the sensor e.m.f. as a function of the inverse redox ratio (defined as...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 1995-04, Vol.25 (1), p.362-365
Main Authors: Brailsford, A.D., Yussouff, M., Logothetis, E.M., Shane, M.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
General equipment and techniques
General, instrumentation
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Oxygen sensor
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Steady-state model
Zirconia
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Summary:The theory of gas sensors developed previously is used to analyze in detail the response of a zirconia oxygen sensor exposed to a mixture containing oxygen and a single reducing gas such as CO or hydrogen. Results for changes in the sensor e.m.f. as a function of the inverse redox ratio (defined as twice the ratio of the partial pressure of oxygen to that of the reducing gas in the cases cited) due to variations in gas diffusion, adsorption, desorption, and Pt electrode surface-reaction rates are presented. The response of the sensor to a fully equilibrated gas mixture is also described.
ISSN:0925-4005
1873-3077
DOI:10.1016/0925-4005(95)85081-3