Hydrogen Storage in Iron/Carbon Nanopowder Composite Materials: Effect of Varying Spiked Iron Content on Hydrogen Adsorption

Table 1

Results of measured N₂ isotherm using BET analysis and measured hydrogen adsorption capacities.

Sample	BET surface area	Pore volume	Pore diameter	Gravimetric adsorption capacity	Normalized adsorption capacity
	(m^2/g)	(cm^3/g)	(nm)	(wt%)	(10^−3× g-H2/m^2)
CNP	110.26	0.441	15.99	0.386	3.497
7Fe/CNP	226.86	0.682	12.03	0.452	1.993
14Fe/CNP	191.13	0.429	8.99	0.610	3.191
28Fe/CNP	128.04	0.352	11.00	0.512	3.995
56Fe/CNP	147.67	0.529	14.33	0.478	3.239