Abstract
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.
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