Abstract
This work reports an H 2-sensing mechanism of TiO 2 thick-films, deposited on alumina substrates by screen-printing. The role of the catalytic activity of the electrode material on the sensor response was tested with platinum and gold electrodes. An impedance analyser (20 Hz–1 MHz) was used to monitor the film impedance before and after exposure to H 2. Continuous monitoring of the film resistance was performed with a simple dc measurement. The film resistance was measured as a function of temperature (500–650°C), time, and gas phase composition (air and 0–10% H 2 in a N 2-based gas stream). The equilibrium gas phase Po 2 (monitored with a zirconia-based oxygen sensor) was also used to identify the hydrogen detection mechanism of the films.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call