Destabilization of the Mg-H system through elastic constraints

Details Destabilization of the Mg-H system through elastic constraints Destabilization of the Mg-H system through elastic constraints

2009-03-10

arxiv.org/abs/0903.1709v1

Physics

Condensed Matter

Materials Science

Scientific paper

We tune the thermodynamics of hydrogen absorption in Mg by means of elastic clamping. The loading isotherms measured by hydrogenography show that Mg films covered with Mg-alloy-forming elements, such as Pd and Ni, have hydrogen plateau pressures more than two orders of magnitude higher than bulk Mg at the same temperature. An elastic model allows us to interpret the Mg thickness dependence of the hydrogen plateau pressure. Our results provide the basis for the development of new hydrogen storage materials with excellent thermodynamic properties.

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