Highly crumpled graphene nanosheets (GNS) with a BET surface area as high as 1159 m(2) g(-1) was fabricated by a thermal exfoliation method. A systematic investigation was performed on the hydrogen sorption properties of MgH(2)-5 wt% GNS nanocomposites acquired by ball-milling. It was found that the as-synthesized GNS exhibited a superior catalytic effect on hydrogenation/dehydrogenation of MgH...

Reaction of PYR-(MgnBu)2, in which PYR is 2,6-[(DIPP)NC(Me)CHC(Me)N-]2-pyridine and DIPP is 2,6-iPr2-phenyl, with (DIPP)NH2BH3 gave PYR-[MgNH(DIPP)BH3]2 (56%) which was characterized by crystal structure determination. Addition of THF resulted in β-H elimination and formation of PYR-[MgNH(DIPP)BH3](MgH)·THF (57%), likewise characterized by crystal structure determination. Conversion of the seco...

MgH2 is a very hopeful material for application as hydrogen storage in the solid form. This due to its reversibility and ability store large amounts of hydrogen, which 7.6 wt%. However, this still has weaknesses, namely high operating temperature slow kinetic reactions. Various attempts have been made overcome weakness, including downsizing adding catalyst. In study, double catalyst was used, n...

Reduced the temperature for the LiNH2 to Li2NH transition from 120C to 50C via mechanical activation. This reduction paves the way for near-room-temperature hydrogen sorption and desorption of the LiNH2 + LiH system. Enhanced hydrogen sorption and desorption rates of the LiNH2 + LiH system at and below 200 C via mechanical activation. Identified the dehydriding behavior and issues associated wi...

The dissociative sticking probability for H2 on Pd films supported on sputtered Highly Ordered Pyrolytic Graphite (HOPG) has been derived from measurements of the rate of the H–D exchange reaction at 1 bar. The sticking probability for H2, S, is higher on Pd hydride than on Pd (a factor of 1.4 at 140 C), but the apparent desorption energy derived from S is the same on Pd and Pd hydride within t...

The sequential treatment of Lewis acids with N,N'-bidentate ligands and thereafter with ButLi has afforded a series of hydride-encapsulating alkali metal polyhedra. While the use of Me3Al in conjunction with Ph(2-C5H4N)NH gives Ph(2-C5H4N)NAlMe2 and this reacts with MeLi in thf to yield the simple 'ate complex Ph(2-C5H4N)NAlMe3Li.thf, the employment of an organolithium substrate capable of beta...

M. Pozzo1 and D. Alfè1,2,3,* 1Department of Earth Sciences and Materials Simulation Laboratory, University College London, Gower Street, London WC1E 6BT, United Kingdom 2Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom 3London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London WC1H 0AH, United Kingdom Re...

Nanosystems can exhibit interesting novel chemical and physical properties and are widely exploited for their functionalities. [ 1–6 ] Scrutinizing such systems and relating, e.g., details in their chemistry and geometry to functionality, remains, however, a signifi cant experimental challenge. Unwanted artifacts and averaged responses are always present in ensembles of a sample material and ar...

Various synthesis and rehydrogenation processes of lithium hydride (LiH) and magnesium amide (Mg(NH₂)₂) system with 8:3 molar ratio are investigated to understand the kinetic factors and effectively utilize the essential hydrogen desorption properties. For the hydrogen desorption with a solid-solid reaction, it is expected that the kinetic properties become worse by the sintering and phase sepa...