Hydrogen diffusion and effect of grain size on hydrogenation kinetics in magnesium hydrides
- 1 February 2008
- journal article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 23 (2), 336-340
- https://doi.org/10.1557/jmr.2008.0063
Abstract
Hydrogenation and dehydrogenation of metal hydrides are of great interest because of their potential in on-board applications for hydrogen vehicles. This paper aims to study hydrogen diffusion in metal hydrides, which is generally considered to be a controlling factor of hydrogenation/dehydrogenation. The present work first calculated temperature-dependent hydrogen diffusion coefficients by a theoretical model incorporated with experimental data in a Mg-based system and accordingly the activation energy. The grain size effect on diffusion in nanoscale was also investigated.Keywords
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