Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1282769 | International Journal of Hydrogen Energy | 2010 | 5 Pages |
Abstract
We report the proof of concept of a thin film device with a one-to-one relationship between the H2 partial pressure and the lateral progression of a visible optical change along a thin film multilayer 70 mm long. The device basically consists of a sensing Mg layer with a thickness gradient. It exploits the thickness dependence of the hydrogenation thermodynamics of Pd-capped Mg thin films. The optical change of the Mg layer during the metal–hydride transition can be detected both in reflection and in transmission. This optical sensor allows a continuous measurement of hydrogen partial pressure in the range between 200 and 4000 Pa.
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Authors
V. Palmisano, M. Filippi, A. Baldi, M. Slaman, H. Schreuders, B. Dam,