Hydrogen Storage in Nanocrystalline Mg Powders

Adam Revesz

doi:10.4028/www.scientific.net/MSF.589.149

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Hydrogen Storage in Nanocrystalline Mg Powders
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HomeMaterials Science ForumMaterials Science Forum Vol. 589Hydrogen Storage in Nanocrystalline Mg Powders

Hydrogen Storage in Nanocrystalline Mg Powders

Abstract:

Conventional polycrystalline MgH2 was ball-milled under hydrogen atmosphere Afterwards 2 mol % pre-milled Nb2O5 (∼ 40 nm) was added to the MgH2 as a catalyst and the milling was continued. The effect of the milling duration and microstructure on the temperature of hydrogen desorption and on the dehydriding kinetics of the ball-milled MgH2 + Nb2O5 powders was analyzed. In addition, taking into account the microstructural parameters, e.g. the median and variance of the log-normal grain-size distribution of MgH2 powders, the reaction kinetics can be modeled by introducing a multi-particle reaction function.