Abstract
The performance of solid-state ionic devices is often dependent on chemisorption and surface reactions. Due to the nature of these processes, they can be influenced with electric fields. The primary focus of this work is to explore the use of externally-generated (i.e., not directly biased) electric fields to modify the behavior and performance of solid-state gas sensors. This electric-field effect was displayed using a planar gas sensor, which consisted of sensing electrodes exposed to the same environment. The effect was further investigated using an air-reference sample to simultaneously monitor changes in the electrical properties of a semiconducting oxide/electrolyte couple and changes in gas composition as a result of the electric field. In order to gauge effects to the semiconducting oxide alone, temperature programmed desorption (TPD) experiments were conducted. Changes in catalytic conversion, shifts in adsorption energies, and modifications to the sensor signals are discussed.
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