A feasible solution to the problem of urban pollution is hydrogen propelled zero-emission vehicles. The US Department of Energy (DoE) has set the target of 6.5 wt% of H2 storage capacity and a volumetric energy density of 1.5 kWh/L at an operating temperature and pressure conditions of 50C and 2.5 bar respectively by 2010.[1] The storage media being studied until now have not been able to succe...

We report a new concept of structural transformation combined with tuning phenomena which together result in a significant increase in the hydrogen storage capacity in an icy material. It is necessary to investigate the use of a fully water-soluble structure H (sH) former so as to observe how hydrogen molecules are stably loaded into hydrate cages.

In this study, we have investigated radius dependence of hydrogen storage within armchair (n,n) single walled carbon nanotubes (SWCNT) in a square arrays. To this aim, we have employed equilibrium molecular dynamics (MD) simulation. Our simulations results reveal that radius of carbon nanotubes are an important and influent factor in hydrogen distribution inside carbon nanotubes and consequentl...

A Cu−carborane-based metal−organic framework (MOF), NU-135, which contains a quasi-spherical para-carborane moiety, has been synthesized and characterized. NU-135 exhibits a pore volume of 1.02 cm/g and a gravimetric BET surface area of ca. 2600 m/g, and thus represents the first highly porous carborane-based MOF. As a consequence of the unique geometry of the carborane unit, NU-135 has a very ...

LLE Review, Volume 91 125 Introduction The transition metal–hydrogen systems have been intensively researched for many years because of the various applications of these systems. A large hydrogen solubility in some transition metals allows their use for safe and high-capacity hydrogen storage.1,2 At the other end of the spectrum, hydrogen ingress at low concentrations can induce mechanical degr...

Hydrogen storage capacities have been studied on newly designed three-dimensional pillared boron nitride (PBN) and pillared graphene boron nitride (PGBN). We propose these novel materials based on the covalent connection of BNNTs and graphene sheets, which enhance the surface and free volume for storage within the nanomaterial and increase the gravimetric and volumetric hydrogen uptake capaciti...

Cu(OH)(2) nanoribbon arrays were synthesized by a simple room-temperature solution reaction for the first time, which exhibited noticeable hydrogen storage capacity and large BET surface area.

Activated carbons (ACs) with controlled microporosity have been prepared and their H2 storage performances have been tested in a gravimetric device. Such adsorbents are natural Chinese anthracites chemically activated with alkaline hydroxides, NaOH or KOH. Outstanding total storage capacities of hydrogen, as high as 6.6wt.% equivalent to excess capacity of 6.2 wt.%, have been obtained at 4MPa f...

We report a first-principle study of the tunable hydrogenation of endohedral metallofullerenes M@C60 and M2@C60, where M ) Li, Be, Mg, Ca, Al, and Sc. The interaction between the encapsulated metal atoms and the C60 cage leads to a tuning of the hydrogen binding in a desired manner as the hydrogenation proceeds. At lower H densities, when H atoms are too strongly bound to pure C60, the endohedr...