P5.1 - Zeolite-based selective potentiometric hydrogen sensor

Gunter Hagen & Ralf Moos
Planar potentiometric gas sensors consisting of thin-film interdigital electrodes (IDE) and an ionconducting zeolite thick-film cover layer are manufactured. One electrode comprises a thin film metaloxide layer on top, which is in contact to the zeolite. Electromotive forces between the electrodes depend on temperature, gas concentrations and the sensor configuration (type of metal oxide layer / type of ions in the Pt-doped zeolite). Results of a Pt-Na-ZSM-5 on Au/AuPt electrodes measured at 400 °C are...