Analysis of adsorption equilibrium of hydrogen on graphene sheets

► We measure adsorption data of hydrogen on the graphene sheets (GS) over a wide temperature and pressure range. ► Adsorption model is modified to study the adsorption equilibrium of hydrogen on the GS. ► The hydrogen storage capacity of the GS is correlated with the structure and the physical properties. ► Much stronger interaction between hydrogen molecules and graphene layers has been found.