Abstract
The mechanism of the impedance response of sodium ion conducting zeolite (Na-ZSM-5) in contact with a Cr2O3 thin film to hydrocarbon gases is studied, using impedance spectroscopy as a function of the applied bias voltage and the film thickness. An ion insertion mechanism of Na+ into the Cr2O3 lattice is proposed. The voltage dependence of the ion insertion resistance is the main cause for the impedance response. In the gas sensor, the potential change is caused by the potentiometric response of the interface between zeolite and electrode to hydrocarbon gases.
Publisher
The Electrochemical Society
Cited by
1 articles.
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