Recently, Hydrogen physisorption in porous
materials such as zeolites, CNTs, MOFs and carbon-base structure have been
received remarkable attention among researchers. Carbon-base structures such as
graphene due to being easy-synthesized and inexpensive are a field of great
current interest to increase the amount of hydrogen uptake in the ambient
temperature and pressure. Another feature of graphene which makes it attractive
is the lightweight. By reduction of a colloidal suspension of exfoliated
graphite oxide, Srinivas et al.5 reported hydrogen
uptake capacity in 10 bar was about 1.2 wt % and 0.1 wt % at 77 K and
298 K, respectively. By chemisorbing calcium on both side of graphene,
Ataka et al.6 calculated the hydrogen
storage 8.4 wt%. In this calculation, orientation of calcium on the various side
of graphene was studied. Hydrogen adsorption in single sheets of powder
graphene was studied by Ma et al.7  in 2008. The hydrogen was stored in graphene
0.4 wt% and <0.2 wt% at 77 K under 100 kPa and ambient temperature under 6 MPa respectively. Me et al. synthesized graphene by using a chemical exfoliation from graphite. The main features for improving adsorption of hydrogen in graphene are the structure enhancement and also fictionalizing. Wang et al.8 investigated in 3d graphene with Ni–B nanoalloys and reported 4.4 wt% at 77 K and 106 kPa. Doping Ni-B nanoalloys caused spillover which can be resulted in increasing hydrogen uptake by chemisorption method.  The hydrogen spillover occurred whenever the hydrogen molecules were dissociated and to be transported through the surface. This technique has improved the hydrogen adsorption by providing hydrogen atoms which can be adsorbed by various ways, such as, physisorption, chemisorption and capsulation. The interaction energy between adsorbent and adsorbed will be decreased in this technique, however, the atoms of hydrogen storage more easily9, 10. In this regard, in this paper the 3d graphene has been synthesized and investigated for enhancing the structures pores and also the best time and temperature for appearance quality of 3d graphene were discussed. The characterization of 3d graphene also is analyzed by FESEM, XRD and RAMAN. The hydrogen uptake of 3d graphene has been studied and a comparison between different structures of 3d graphene for storing was made.