Abstract
Amorphous carbon nanotubes (ACNTs) were produced by a temperature-controlled arc discharging furnace with a mixture powders of Co-Ni (1:1wt%) alloy as catalyst and hydrogen as buffer gas. As-grown and treated ACNTs with a mean diameter of about 14nm for hydrogen storage and release experiments were studied in this paper. The test experiments of hydrogen uptake and release were carried out by a volumetric gas-adsorption measurement system. The results indicated that the hydrogen storage capacity of ACNTs was 1.1wt% at the pressure of 2.45MPa and room temperature. Around 50% of the adsorbed hydrogen gas of ACNTs could be released under a standard pressure and at room temperature.
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