Abstract

A spiral carbon nanofiber of 30 to 40 nm diam and 20 µm average lengths has been synthesized by catalyst chemical vapor deposition method using Ni or Fe‐Ni alloy as catalyst. The purpose of synthesis of carbon nano fibers was to use it for hydrogen adsorption. Catalysts used affected the morphology of carbon nano material (CNM) where as purification and ball milling of CNMs affected the hydrogen adsorption. The hydrogen adsorption is found to be 0.296 wt% and 0.334 wt% at hydrogen pressure of 11 Kg/cm2 with as grown and purified CNMs with nitric acid respectively. After the ball milling of CNMs, their hydrogen storage capacity decreased to 0.222 wt%.

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