Abstract
Planar electrochemical sensors based on tape-cast yttria stabilized zirconia (YSZ, 8 wt.% of Y 2O 3) layers with two Pt parallel electrodes, one coated with WO 3 powders were prepared. The WO 3 powders were synthesized in the laboratory using different chemical routes. The NO 2 and CO potentiometric response of the sensors was measured at high temperature and compared to the response of the sensors fabricated using commercial WO 3 powders. Promising results in terms of selectivity, sensitivity, stability, reproducibility and response time were obtained for synthesized WO 3-based sensors in comparison to the response of commercial WO 3-based sensors.
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