Hydrogenation of graphene

Figure 9.5(d) gives an impression about the topo-chemical nature of the hydrogen atom s attack on carbon. Even these highly reactive species attack carbon not in an isotropic form but react from the edges and thus decorate, after some extent of conversion, the planar shape of the BSU as stacks of graphene layers with uneven but identical outer shapes. The rounded protrusions into the edge structure arise from defect clusters that would manifest themselves in a perpendicular view as etch pits . 

AreUano, J.S., Molina, L.M., Rubio, A., and Alonso,. A. (2000). Density functional study of adsorption of molecular hydrogen on graphene layers. J. Chem. Phys., 112, 8114-19. 

T. Heine, L. Zhechkov and G. Seifert, Hydrogen storage by physisorption on nanostmcture graphite platelets . Physical Chemistry Chemical Physics, 6,980 (2004). A. Ferre-Vilaplana, Nnmerical treatment discnssion and ah initio compntational reinvestigation of physisorption of molecnlar hydrogen on graphene . The Journal of Chemical Physics, 122, 104709 (2005). 

---