Abstract
Hydrogen adsorption and desorption in different carbon materials were determined at 77 and 296 K. Superactivated carbon having specific surface area of 3220 m 2/g, adsorbed and desorbed 5 wt.% of hydrogen at 77 K and 1.3 wt.% of hydrogen at 296 K. The values were greater than those of conventional activated carbon, graphite nanofiber and single-walled carbon nanotube. The hydrogen adsorption capacities of the various carbon materials were given as a function of the specific surface area. According to the Clausius–Clapeyron equation, the heat of adsorption of the superactivated carbon was about 6 kJ/mol H 2.
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