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

Abstract Bulk graphene was prepared by the method of magnesium combustion in a CO 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 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 2 at 65 bar and 77 K, and 0.9 wt.% of H 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 2 adsorption investigations.