Photothermal hydrogen sensor: the technique, experimental process, and physicochemical analysis
Date
2008ISSN
0947-8396Source
Applied Physics A-Materials Science & ProcessingVolume
92Issue
3Pages
651-658Google Scholar check
Keyword(s):
Metadata
Show full item recordAbstract
The kinetics of hydrogen adsorption and desorption on palladium thin films was studied via photomodulated thermoreflectance measurements. The subsequent analysis based on a Langmuirian isothermal model supports dissociative adsorption of hydrogen on palladium followed by molecular desorption. Furthermore, the rate constants of adsorption and desorption were determined and their values are discussed. The response and recovery times of the sensor were measured and their dependence on hydrogen concentration is also explored and discussed.