Oxygen and carbon monoxide role on the electrical response of a non-Nernstian potentiometric sensor; proposition of a model

Nicolas Guillet 1, 2, 3 René Lalauze 1, 2, 3 Christophe Pijolat 1, 2, 3
1 MICC-ENSMSE - Département Microsystèmes, Instrumentation et Capteurs Chimiques
2 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
3 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires
Abstract : The sensor used for the study was obtained from a solid electrolyte fitted with two metal electrodes (gold and platinum, respectively) located in the same gas mixture and was made using the screen printing technology. A kinetic model able to account for the electrical responses obtained in the presence of oxygen and carbon monoxide is proposed. This model is mainly based on the existence of several oxygen species adsorbed on the surface of the device and on the ideally polarizable properties of the electrodes. Action of carbon monoxide is assumed to occur according to a Langmuir-Hinshelwood model, which involves the consumption of oxygen species considered as a weakly metal-bonded particle. The simulations reveal that such a model is able to account for the complex influence of carbon monoxide, the oxygen pressure and the temperature on the electrical sensor's response.
keyword : Oxygen Carbon monoxide Potentiometric gas sensor Pt Au Solid electrolyte
Type de document :
Article dans une revue
Sensors and Actuators B: Chemical, Elsevier, 2004, 98 (2-3), pp.10-9. 〈10.1016/j.snb.2003.10.001〉
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https://hal-emse.ccsd.cnrs.fr/emse-00431115
Contributeur : Andrée-Aimée Toucas <>
Soumis le : mardi 10 novembre 2009 - 17:08:57
Dernière modification le : mardi 23 octobre 2018 - 14:36:07

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Nicolas Guillet, René Lalauze, Christophe Pijolat. Oxygen and carbon monoxide role on the electrical response of a non-Nernstian potentiometric sensor; proposition of a model. Sensors and Actuators B: Chemical, Elsevier, 2004, 98 (2-3), pp.10-9. 〈10.1016/j.snb.2003.10.001〉. 〈emse-00431115〉

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