Article ID Journal Published Year Pages File Type
7149028 Sensors and Actuators B: Chemical 2013 7 Pages PDF
Abstract
We report on hydrogen sensing studies of palladium and Pd thin film-coated magnesium thin films, which were prepared by pulsed laser deposition. Pd film shows the hydrogenation and dehydrogenation at room temperature leading to a reversible process. While Pd thin film-coated Mg film shows hydrogenation at room temperature and dehydrogenation at 100 °C. Electrical resistance measurements were carried out in situ by a two-probe technique in a known pressure of hydrogen gas and air. The change in electrical resistance during hydrogenation/dehydrogenation process is found to be reversible. The film response time is typically 22 s for Pd film and 60 s for Pd thin film-coated Mg film. All films are found to be stable after hydrogenation and dehydrogenation cycle. These studies prove that Pd and Pd thin film-coated Mg thin films also can be used as low-cost and low temperature hydrogen sensor.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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