Studies into the Storage of Hydrogen in Carbon Nanofibers: Proposal of a Possible Reaction Mechanism

摘要: Substantial levels of hydrogen, up to 6.5 wt %, have been stored in carbon nanofibers (CNFs) under conditions 12 MPa pressure and ambient temperature. The magnitude this result cannot be interpreted terms physisorption on the external surface alone. Kinetic studies indicate that a slow chemisorption process is involved. rate uptake corresponds hydrogen dissociation graphite edge sites. Such finding proposes novel mechanism, offering plausible explanation for these unusually high experimental observations. This involves initial believed catalyzed by sites, which constitute majority nanofiber surface, property probably an important contributory factor toward their storage capacities.