Abstract
Carbon nanofibers were synthesized by catalytic decomposition of methane using Ni–MgO catalyst and hydrogen adsorption experiments were carried out by a Sievert’s apparatus under 120 bar at 25 °C. Hydrogen adsorption capacity was elevated up to 1.4 wt.% after heat treatment at 1200 °C in N 2 atmosphere. CO and CO 2 were detected by gas chromatography (GC) during heat treatment which promoted active surface suitable for hydrogen adsorption of carbon nanofibers. High resolution transmission electron microscopy (HRTEM) and XRD analysis revealed that the structure of carbon nanofibers was durable after hydrogen uptake even at high pressures.
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