Hydrogen Storage in Nanostructured Carbon Materials at Room Temperature

Room temperature hydrogen sorption capacities of nanostructured carbon materials including single‐walled carbon nanotubes (SWNTs), multi‐walled carbon nanotubes (MWNTs), carbon nanohorns (CNH), activated carbon, carbon black and graphite are determined by the volumetric method. All carbon materials investigated, including the samples with high specific surface area as purified SWNTs prepared by the HiPco process and activated carbon, show a hydrogen storage capacity of less than 1 wt % at room temperature and pressures below 100 bar.