The effects of electrical contact configuration for La2CuO 4 sensing electrodes for a planar-based potentiometric gas sensor were studied in order to further quantify the effects of processing on sensor performance. Five configurations of La2CuO4 were used for the sensing electrode. The La2CuO4 sensing electrode was screen printed opposite a Pt counter electrode on a tape cast YSZ electrolyte. Three sensors were prepared for each configuration to test repeatability. Each sensor was tested at temperatures from 400 to 700 °C at various concentrations of NO2, NO, and CO in an environment of 3% O 2 with a balance of N2. Results show that these sensors exhibit suitable sensitivity to all the gases tested. More importantly, it was shown that the sensitivity, selectivity/cross-sensitivity, and repeatability of these sensors are dependent on the sensing electrode configuration.
Bibliographical noteFunding Information:
This material is based upon work supported under a National Science Foundation Graduate Research Fellowship and United States Department of Energy contract DE-FG26-02NT41533 . This work was also partly funded by the Ministry of Foreign Affairs (MAE) of Italy under the frame of the Italy–USA Joint Laboratory on “Nanomaterials for Hydrogen and Sustainable Energy”. The authors would also like to thank Laure Chevallier for valuable discussions.
- Potentiometric gas sensor
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry