Electrochemical NOx sensors for emission control of automotive exhaust gas were prepared coupling pellets of yttria-stabilized zirconia (YSZ), an oxygen ion conductor, with thick films of a semiconducting oxide (WO3) as an auxiliary phase. The obtained sensors were wholly exposed to the same atmosphere. Electromotive Force (EMF), polarization curves and amperometric measurements were performed in air and at different concentrations of NO2 in air, at selected temperatures. Stable EMF values and fast response times were obtained. The sensors showed non-linear polarization curves. The role played by the electrolyte/electrode interface was determined by electrochemical impedance spectroscopy (EIS) tests: exposure to NO2 did not affect the bulk but only the electrolyte/electrode interface. Further studies are needed, however, to better understand the sensing mechanisms of these devices, and to confirm the stability and selectivity in the presence of other exhaust gases, like hydrocarbons, CO or sulphur compounds.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Electrochemical NO(x) sensors for emission control of automotive exhaust gas


    Additional title:

    Elektrochemische NO(x)-Sensoren für die Regelung der Abgasemissionen von Kraftfahrzeugen


    Contributors:


    Publication date :

    2001


    Size :

    5 Seiten, 5 Bilder, 24 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Electrochemical NOx Sensors for Emission Control of Automotive Exhaust Gas

    Dutta, Atanu / Di Bartolomeo, Elisabetta / Traversa, Enrico et al. | SAE Technical Papers | 2001


    Electrochemical NO~x Sensors for Emission Control of Automotive Exhaust Gas

    Grilli, M. L. / Kaabbuathong, N. / Dutta, A. et al. | British Library Conference Proceedings | 2001


    Automotive Exhaust Sensors Using Titania Ceramic

    Meitzler, A. H. / Gibbons, E. F. / Beaudoin, G. L. et al. | SAE Technical Papers | 1975


    Ceramic sensors for automotive exhaust gas monitoring

    Wang,L. / Akbar,S. / Soliman,A. et al. | Automotive engineering | 1997


    Ceramic Sensors for Automotive Exhaust Gas Monitoring

    Wang, L. / Akbar, S. / Soliman, A. et al. | British Library Conference Proceedings | 1997