6.5.3 Recent developments in materials for potentiometric sensors
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 6.5 YSZ Based Sensors
- Author(s)
- J. Zosel, M. Schelter, W. Oelßner, C. Vonau, U. Enseleit, U. Guth, M. Mertig - Meinsberg Kurt-Schwabe Research Institute (Germany), V. Voshook - Technische Universität Dresden, Institute for Physical Chemistry (Germany), D. Tuchtenhagen - ACEOS GmbH (Germany), K. Wienand - Heraeus Sensor Technology GmbH (Germany)
- Pages
- 569 - 572
- DOI
- 10.5162/IMCS2012/6.5.3
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
Electrochemical gas sensors based on Yttria Stabilized Zirconia (YSZ) with mixed potential electrodes are suited for in-situ measurements of low concentrations of combustibles like hydrogen, carbon monoxide, hydrocarbons and also nitrogen oxides. The parameters sensitivity, selectivity and long-term stability of these sensors are correlated mainly with the performance of the electrode material. The contribution will give an overview about recent developments on materials for that purpose. Examples, which are presented in more detail, concern polymer composite materials (CPC) and surface modified Au/Pt alloy materials for mixed potential sensors. The materials have been characterized with respect to their morphology, thermal stability, catalytic activity and electrochemical behaviour on solid electrolytes in gases containing hydrogen, ethene and propene. For the first time it could be demonstrated, that CPC, consisting of polyaniline and different metal oxides or metal salts can be used at high temperature measurement up to temperatures of 450 °C b ecause of improved thermal properties.