Abstract
Stabilized zirconia-based electrochemical devices for which the sensing electrode was provided with a single-metal oxide were tested for NO and NO2 sensing properties at high temperature. Among the many single-metal oxides examined, WO3 was found to give the best sensing properties to NO and NO2 at 500–700°C. The EMF response of the WO3-attached device was linear to the logarithm of NO or NO2 concentration. The response and recovery kinetics were speedy. The device gave very small cross-sensitivities to H2, CO, CH4, CO2 and water vapor. The sensing mechanism involving mixed-potential was confirmed from the measurements of polarization curves.
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Lu, G., Miura, N. & Yamazoe, N. High-temperature NO or NO2 sensor using stabilized zirconia and tungsten oxide electrode. Ionics 4, 16–24 (1998). https://doi.org/10.1007/BF02375775
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DOI: https://doi.org/10.1007/BF02375775