Modified Graphene Sheet Stacks for Hydrogen Binding

Peteris LESNICENOKS, Janis ZEMITIS, Liga GRINBERGA, George CHIKVAIDZE, Janis KLEPERIS, Marius URBONAVIČIUS, Simona TUČKUTE, Darius MILČIUS

Abstract


Graphene sheet stacks were obtained using electrochemical exfoliation method. The morphology, distribution of elements and structure of the obtained samples were investigated using scanning electron microscopy, energy dispersive spectroscopy, Raman spectroscopy and Brunauer-Emmett-Teller methods. The graphene sheet stacks mostly have been formed with open stack structures having surface area of 124 m2/g. Mg intercalation in graphene sheet structures was obtained adding MgCl2 during exfoliation process. Hydrogen desorption were measured in the temperature range 100 473 K at the pressure 2 bar reaching maximal desorbed hydrogen amount of 0.12 0.43 wt.%.

DOI: http://dx.doi.org/10.5755/j01.ms.23.1.13729


Keywords


hydrogen storage, graphene, exfoliation, multi-sheet stacks

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Print ISSN: 1392–1320
Online ISSN: 2029–7289