Web Release Date: November 23,
Metallic and Carbon Nanotube-Catalyzed Coupling of Hydrogenation in Magnesium
and
Contribution from the ARC Centre for Functional Nanomaterials, Australian Institute for
Bioengineering and Nanotechnology (AIBN), The University of Queensland, QLD 4072,
Brisbane, Australia, Shenyang National Laboratory for Materials Science, Institute of Metals
Research, Shenyang 110015, China, Centre for Computational Molecular Science, The
University of Queensland, QLD 4072, Brisbane, Australia, and Centre for Microscopy and
Microanalysis, The University of Queensland, QLD 4072, Brisbane, Australia
Received July 31, 2007
Abstract:
Synergistic effect of metallic couple and carbon nanotubes on Mg results in an ultrafast kinetics of hydrogenation that overcome a critical barrier of practical use of Mg as hydrogen storage materials. The ultrafast kinetics is attributed to the metal-H atomic interaction at the Mg surface and in the bulk (energy for bonding and releasing) and atomic hydrogen diffusion along the grain boundaries (aggregation of carbon nanotubes) and inside the grains. Hence, a hydrogenation mechanism is presented.
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