Hydrogen Storage Using Carbon Nanotubes

Carbon Nanotubes: Molecular and Electronic Properties of Regular and Defective Structures

“…Inspired by the unique properties of nanotubes and driven by the idea of contributing to a clean energy source for vehicular use, several authors have studied the possibility of using CNTs as hydrogen transporters [36][37][38][39][40]. Hydrogen may be chemisorbed (covalently attached to carbon atoms) or physisorbed (adsorbed as molecular hydrogen through noncovalent interactions with the nanotube).…”

“…In relation to hydrogen storage as a potential source of clean energy, one requirement is to achieve that at least 5.5 wt% of hydrogen [49] can be released under ambient pressure and temperature conditions. For achieving that goal and to favor a reversible H 2 adsorptiondesorption process, it is required that the interaction energy CNT-H 2 be of the order of 0.1-0.5 eV/H 2 , according to calculations of first principles and to thermodynamic considerations [14,39,50,51].…”

Interconnecting Carbon Nanotubes for a Sustainable Economy

“…However, problems began to arise when increasing values of CNT storage capacities, up to 21 wt%, were reported. A detailed review of the findings can be found by Yunjin Yao and serves as an interesting footnote towards the role of CNTs and the need for a better understanding of their chemistry in materials [15]. In summary, the main concerns were that elevated hydrogen storage percentages may have be due to a number of factors including the insufficient characterization of CNT composites due to the presence of SWCNTs, DWCNTs and MWCNTs with a variety of open and closed ended tubes.…”

Defected and Substitutionally Doped Nanotubes: Applications in Biosystems, Sensors, Nanoelectronics, and Catalysis

“…The use of CNTs in hydrogen storage remains an active area of research (Yao 2010). For instance, defective CNTs and their ability to undergo adsorption of H 2 has also been investigated (Gayathri et al 2007).…”