Application of advanced morphology Au–X (X = YSZ, ZrO<sub>2</sub>) composites as sensing electrode for solid state mixed-potential exhaust NO<sub>x</sub> sensor - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue Sensors and Actuators B: Chemical Année : 2015

Application of advanced morphology Au–X (X = YSZ, ZrO2) composites as sensing electrode for solid state mixed-potential exhaust NOx sensor

Résumé

Among various NOx sensors developments, mixed potential sensor based on Yttria Stabilized Zirconia (YSZ) with a simple planar architecture Au/YSZ/Pt is of practical interest. Au composites electrodes were investigated to improve sensing performances. Such potentiometric solid-state gas sensors – were fabricated by screen-printing and tested for NO2 detection. Electrochemical impedance spectroscopy has shown that the addition of YSZ in the Au electrode decreased the polarization resistance in air. In addition, the (Au + 10 wt% YSZ)/YSZ/Pt sensor has a shorter response time and higher sensitivity to NO2 (range 20–100 ppm) at 450–550 °C in comparison with a reference Au/YSZ/Pt sensor. On the other hand, the addition of non-conductive ZrO2 does not significantly modify the electrochemical property but strongly damages the sensor responses toward NO2.
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Dates et versions

hal-01082763 , version 1 (07-01-2015)

Identifiants

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Ivan Romanytsia, Jean-Paul Viricelle, Philippe Vernoux, C. Pijolat. Application of advanced morphology Au–X (X = YSZ, ZrO2) composites as sensing electrode for solid state mixed-potential exhaust NOx sensor. Sensors and Actuators B: Chemical, 2015, 207, pp.391-397. ⟨10.1016/j.snb.2014.10.017⟩. ⟨hal-01082763⟩
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