Detection of NO by Pulsed Polarization Technique Using Pt Interdigital Electrodes on Yttria-stabilized Zirconia

To detect NO in the low ppm range in exhaust gases is of high interest due to the ever tighter emission and immission regulations. Applying the pulsed polarization technique, Pt|YSZ sensors like the classical thimble type lambda probes for automotive applications or planar sensor elements (Pt electr...

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Bibliographic Details
Published in:Procedia engineering 2014, Vol.87, p.620-623
Main Authors: Fischer, S., Pohle, R., Magori, E., Fleischer, M., Moos, R.
Format: Article
Language:English
Subjects:
interdigital electrodes
NO detection
polarization
Pt | YSZ
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Summary:To detect NO in the low ppm range in exhaust gases is of high interest due to the ever tighter emission and immission regulations. Applying the pulsed polarization technique, Pt|YSZ sensors like the classical thimble type lambda probes for automotive applications or planar sensor elements (Pt electrodes on both sides of YSZ) show very good sensitivities toward NO. To further improve the sensor with respect to simplicity and robustness for exhaust gas applications, a one-sided design is preferred, especially to implement a heater on the reverse side of the sensor element. For that purpose, a design that bases on platinum interdigital electrodes is investigated. Again, by using this polarization technique very strong signals towards NO in the lowest ppm range have been achieved.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2014.11.565