Effect of Single‐ and Multiwall Carbon Nanotubes with Activated Carbon on Hydrogen Storage

Abstract

Carbon nanotubes and nanoporous activated carbons served as adsorbents for hydrogen storage. Carbon nanotubes were prepared by a special chemical vapor deposition method over a Co‐Mo/MgO catalyst, and nanoporous activated carbons were obtained from walnut shells. According to the Fourier transform infrared analysis, oxygenated functional groups were formed on the structures. The X‐ray diffraction and scanning electron microscopy results let conclude that the structures were not damaged by the acidic vapor method. The maximum experimental value for adsorption capacity was achieved under elevated pressure. The highest capacity of H2 adsorption was detected for nitric acid‐modified carbon.

Advances and Prospects of Nanomaterials for Solid-State Hydrogen Storage

“…The high surface area and microporosity of activated carbons make them promising candidates for hydrogen storage through physical adsorption. However, the hydrogen storage capacity of activated carbons is relatively low (typically < 2 wt.% at room temperature and 100 bar) due to the weak interaction between hydrogen molecules and the carbon surface [ 53 ].…”