Abstract
In the present, enhanced hydrogen sorption over activated iron-doped carbon aerogel (CA) through the spillover effect was taken up. Iron doped carbon aerogel was prepared through sol-gel polymerization of resorcinol-formaldehyde (R–F) with sodium carbonate as a catalyst. Iron doping was made at 1, 5, and 10 wt % levels. It has been further inferred that the presence of nano iron caused carbon nanotube (CNT) formation in the carbon matrix during the carbonization and activation processes. Fe doped CAs were characterized by XRD, SEM, BET, FTIR, and TEM. Hydrogen sorption by 1, 5, and 10% Fe doped CAs at liquid nitrogen temperature (77K) and up to 25 atm. had storage capacities as 1.47 wt%, 1.38 wt%, and 1.28 wt%, respectively. Activation of CAs brought a significant increase in the storage capacity (∼3.80 wt%), which could have been driven by the presence of CNT in the matrix and an increase in the microporosity on activation.
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