Universität Tübingen
Spectroscopic and electrical studies of the influence of electrodes on SnO2 based sensors
Abstract
The influence of the electrode nature on the performance of semiconducting metal oxide based gas sensors is recognized and experimentally proven. Here, for the first time we are providing clear spectroscopic evidence (DRIFTS) for the influence of the electrodes nature (Pt and Au) on the surface chemistry associated to CO detection with SnO2 thick film sensors. Our results show that the nature and concentration of the CO reaction intermediates (carbonates and carboxylates) depend on the presence and nature of the electrodes. Moreover, Thermodesorption measurements prove that the influence of the electrodes nature plays a key role on oxygen adsorption at the SnO2 surface. The result will be discuss in order to be useful for basic understanding of gas sensors.
Author and committee
dc:creator, dc:contributor.*- Author
-
- Bertrand, Johan
Identifiers
dc:identifier.*- Identifier
- hdl:10900/49230