Hydrogen adsorption characteristics of magnesium combustion derived graphene at 77 and 293 K

Bulk graphene was prepared by the method of magnesium combustion in a CO sub(2) atmosphere, producing large quantities of material which had a different morphology and importantly, a more ordered carbon lattice than reduced graphene oxide and other bulk graphene synthetic methodologies. Despite a lo...

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Bibliographic Details
Published in:International journal of hydrogen energy 2014-04, Vol.39 (12), p.6783-6788
Main Authors: CUNNING, Benjamin V, PYLE, Darryl S, MERRITT, Christopher R, BROWN, Christopher L, WEBB, Colin J, GRAY, Evan MacA
Format: Article
Language:English
Subjects:
Adsorption
Alternative fuels. Production and utilization
Applied sciences
Byproducts
Combustion
Energy
Exact sciences and technology
Fuels
Graphene
Hydrogen
Magnesium
Oxides
Surface area
Surface chemistry
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Summary:Bulk graphene was prepared by the method of magnesium combustion in a CO sub(2) atmosphere, producing large quantities of material which had a different morphology and importantly, a more ordered carbon lattice than reduced graphene oxide and other bulk graphene synthetic methodologies. Despite a low surface area of 235.5 m super(2)/g and ca 9 at.% of magnesium and its oxides which do not contribute to hydrogen adsorption, we observe 0.85 wt.% of H sub(2) at 65 bar and 77 K, and 0.9 wt.% of H sub(2) at 300 bar and 293 K. As this methodology readily produces many-gram quantities with cheap starting materials, we anticipate that with further enhancements to the synthetic methodology, improving both surface area and reducing reaction by-products, this material will provide a robust platform for further H sub(2) adsorption investigations.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2014.02.054