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Hydrogen adsorption by perforated graphene
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
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2015 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 40, no 20, 6594-6599 p.Article in journal (Refereed) Published
Abstract [en]

We performed a combined theoretical and experimental study of hydrogen adsorption in graphene systems with defect-induced additional porosity. It is demonstrated that perforation of graphene sheets results in increase of theoretically possible surface areas beyond the limits of ideal defect-free graphene (∼2700 m2/g) with the values approaching ∼5000 m2/g. This in turn implies promising hydrogen storage capacities up to 6.5 wt% at 77 K, estimated from classical Grand canonical Monte Carlo simulations. Hydrogen sorption was studied for the samples of defected graphene with surface area of ∼2900 m2/g prepared using exfoliation of graphite oxide followed by KOH activation. The BET surface area of studied samples thus exceeded the value of single-layered graphene. Hydrogen uptake measured at 77 K and 296 K amounts to 5.5 wt% (30 bar) and to 0.89 wt% (120 bar), respectively. 

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 40, no 20, 6594-6599 p.
Keyword [en]
Graphene-based nanostructures, Hydrogen storage, High surface area, Porous materials
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-104374DOI: 10.1016/j.ijhydene.2015.03.139ISI: 000354581100013OAI: oai:DiVA.org:umu-104374DiVA: diva2:839844
Available from: 2015-07-06 Created: 2015-06-10 Last updated: 2017-12-04Bibliographically approved

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Klechikov, AlexeyMercier, GuillaumeTalyzin, Alexandr
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