Hydrogen storage in high surface area graphene scaffolds.
Chem Commun (Camb)
; 51(83): 15280-3, 2015 Oct 25.
Article
em En
| MEDLINE
| ID: mdl-26335949
ABSTRACT
Using an optimized KOH activation procedure we prepared highly porous graphene scaffold materials with SSA values up to 3400 m(2) g(-1) and a pore volume up to 2.2 cm(3) g(-1), which are among the highest for carbon materials. Hydrogen uptake of activated graphene samples was evaluated in a broad temperature interval (77-296 K). After additional activation by hydrogen annealing the maximal excess H2 uptake of 7.5 wt% was obtained at 77 K. A hydrogen storage value as high as 4 wt% was observed already at 193 K (120 bar H2), a temperature of solid CO2, which can be easily maintained using common industrial refrigeration methods.
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MEDLINE
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En
Ano de publicação:
2015
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Article