Carbon based materials for H2 storage

We set up a volumetric method to quantify the amount of H2 \u201cdelivered\u201d after saturation of porous solids at high pressure. A complementary dynamic method has been also developed to take into account the reversibility of adsorption and to assess in at least a semi-quantitative way the strength of interaction between H2 and the adsorbent. The method has been applied to compare the H2 storage capacity of very promising carbon-based materials, as supplied, after thermal/chemical treatments or functionalized with metals. The best results, ca. 7 wt% H2 \u201cdelivered\u201d, were achieved after saturation at 77 K, 20 kgf/cm2 with an active carbon with ca. 3000 m2/g of apparent specific surface area