论文信息 - A6.4 - Novel mixed potential sensor device to compare two gas compartments and to determine directly the conversion of an automotive catalyst

A6.4 - Novel mixed potential sensor device to compare two gas compartments and to determine directly the conversion of an automotive catalyst

In this work, a novel sensor device is developed. It enables to compare two gas compartments electrochemically by applying the mixed potential sensing principle. Thereby, disadvantages that come along with the usually-used half-cell setups like indirect heating, complicated manufacturing and only destructive dismantling of sample and sealing are overcome. The device bases on an yttria-stabilized zirconia disc that is equipped with an integrated heater to provide a hot area in the center for sensing while at the same time it is cold enough at the outer radius for contacting with a polymer sealing (Oring). As an example for its functionality, the gas mixtures upand downstream of a catalyst were compared, while the sensor voltage correlates well with catalyst conversion.

[1] Daniela Schönauer-Kamin,et al. Half-Cell Potential Analysis of an Ammonia Sensor with the Electrochemical Cell Au | YSZ | Au, V2O5-WO3-TiO2 , 2013, Sensors.

[2] Katharina Burger,et al. A mixed potential based sensor that measures directly catalyst conversion—A novel approach for catalyst on-board diagnostics , 2015 .

[3] Norio Miura,et al. Stabilized zirconia-based sensors using WO3 electrode for detection of NO or NO2 , 2000 .

[4] Franz Schubert,et al. Self-heated HTCC-based ceramic disc for mixed potential sensors and for direct conversion sensors for automotive catalysts , 2017 .

[5] Johann Riegel,et al. Exhaust gas sensors for automotive emission control , 2002 .

[6] Eric L. Brosha,et al. A mixed-potential sensor based on a Ce{sub 0.8}Gd{sub 0.2}O{sub 1.9} electrolyte and platinum and gold electrodes , 2000 .

[7] Norio Miura,et al. A review of mixed-potential type zirconia-based gas sensors , 2014, Ionics.

[8] Norio Miura,et al. Highly selective CO sensor using stabilized zirconia and a couple of oxide electrodes , 1998 .

[9] Jeffrey W. Fergus,et al. Sensing mechanism of non-equilibrium solid-electrolyte-based chemical sensors , 2010 .

[10] Jens Zosel,et al. Au–oxide composites as HC-sensitive electrode material for mixed potential gas sensors , 2002 .

[11] Jens Zosel,et al. Electrode materials for potentiometric hydrogen sensors , 2006 .