Communication Dans Un Congrès Année : 2017

NO2-selective electrochemical sensors for Diesel exhausts

Résumé

Electrochemical NOx sensors based on yttria-stabilized zirconia (YSZ) are commercialized to detect overall NOx concentrations in Diesel exhausts without distinction between NO and NO2. To overcome this inconvenient, a high-sensitive sensor based on selective electrochemical reduction of NO2 is proposed. An electrochemical cell consisting of three metallic electrodes on solid-state electrolyte (YSZ) operating under electric polarization between a gold working electrode and a platinum counter electrode allows selective NO2 detection at 400-550°C with high sensitivity, and without any significant interferences to other gases like hydrocarbons, carbon monoxide and also ammonia and nitrogen monoxide. A mechanism based on cathodic overpotential is proposed.

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J P Viricelle 30th Eurosensors 2016.pdf (266.77 Ko) Télécharger le fichier
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hal-01379516 , version 1 (10-01-2017)

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Jean-Paul Viricelle, Philippe Vernoux, Jing Gao, Ivan Romanytsia, Philippe Breuil, et al.. NO2-selective electrochemical sensors for Diesel exhausts. EUROSENSORS 2016, Hungarian Academy of Sciences; Akadémiai Kiadó / AKCongress, Sep 2016, Budapest, Hungary. pp.7 à 10, ⟨10.1016/j.proeng.2016.11.112⟩. ⟨hal-01379516⟩
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