Hydrogen diffusion and effect of grain size on hydrogenation kinetics in magnesium hydrides
Author(s)
Yao, X
Zhu, ZH
Cheng, HM
Lu, GQ
Griffith University Author(s)
Year published
2008
Metadata
Show full item recordAbstract
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.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.
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Journal Title
Journal of Materials Research
Volume
23
Issue
2
Subject
Condensed matter physics
Solid state chemistry
Physical properties of materials
Materials engineering
Mechanical engineering