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Solid-state Mixed Potential Gas Sensors: Theory, Experiments and Challenges by Fernando H Garzon; Rangachary Mukundan; Eric L Brosha is a Materials Science article available to read on EtoBox.

What is Solid-state Mixed Potential Gas Sensors: Theory, Experiments and Challenges about?

Solid-state mixed potential electrochemical sensors sense gases using differential electrocatalysis on dissimilar electrode materials. The response theory is typically expressed in terms of models invoking Butler-Volmer kinetics at high overpotentials (Tafel behavior). This model is not adequate for describing all types of mixed potential sensor responses. For low concentrations of analyte gas, mass transport limitations must also be considered. Experiments with sensors with air reference electrodes also demonstrate the importance of low overpotential oxygen reduction kinetics in establishing the device response. A sensor response model that predicts a linear relationship between response voltage and analyte gas concentration is derived. The development of oxide electrode based devices offers improved long-term response stability over metal electrode based devices.

Who reads Solid-state Mixed Potential Gas Sensors: Theory, Experiments and Challenges?

Author

Fernando H Garzon; Rangachary Mukundan; Eric L Brosha

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0167-2738)

Published

2000

Language

EN

Field

Materials Science (Physical Sciences)