Hydrogen Storage in Nanocrystalline Mg Powders

Abstract:

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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.

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Periodical:

Edited by:

P.J. Szabó, T. Réti, T. Czigány

Pages:

149-154

DOI:

10.4028/www.scientific.net/MSF.589.149

Citation:

Á. Révész "Hydrogen Storage in Nanocrystalline Mg Powders", Materials Science Forum, Vol. 589, pp. 149-154, 2008

Online since:

June 2008

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$35.00

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