Affiliation:
1. Université Joseph Fourier
2. University Federal de São Carlos
3. Universidade Federal de São Carlos (UFSCar)
4. Universidade Federal de São Carlos
Abstract
A good method to store hydrogen is in it atomic form in crystalline structure of metals at
low pressure. Thanks to magnesium’s high hydrogen storage capacity, its low weight and its high
natural abundance, it is an attractive material to develop hydrogen solid state storage. The
production of Mg-based nanocomposites can enhance the kinetics of H-sorption of magnesium and
the temperature of release of hydrogen. Transition metals as iron, which have important catalytic
activity in hydrogen reactions with Mg, and the surface protective compound MgF2, are interesting
additions for magnesium mixtures for hydrogen storage. In this work, Mg-based nanocomposites
containing Fe and MgF2 were produced by reactive milling under hydrogen using the addition of
FeF3, or directly MgF2 and Fe. The efficiency of centrifugal and planetary mill in MgH2 synthesis
was compared. The phase evolution during different milling times (from 1 to 96 h) using the
planetary was investigated. The different H-desorption behavior of selected milled mixtures was
studied and associated with the different present phases in each case.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
16 articles.
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