Interaction of hydrogne with carbon coils at low temperature

摘要

Hydrogen was adsorbed on carbon coils under 10 MPa hydrogen gas at liquid nitrogen temperatue.The equilibrium pressure of hydrogen desorbed from the as-grown carbon coils with an amorphous structure was three to four times greater than those of multiwall carbon nanotubes(MWNT) and active carbons (AC).The heat treatment of the carbon coils at 850 deg C contributed to an icnrease in hydrogne adsorption by 20 compared to the as-grown carbon coils.On the other hand,the adsorption of hydrogen gas on the carbon coils decreased significantly after heat treatment at a pemperature higher than 1000 deg C due to formation of capsule-like carbon composed of 10-20 layers on the surface of the caron coils.