Hydrogen-rich boron-containing compounds have received extensive attention as potential hydrogen storage media for vehicular applications. The past years have seen significant progresses in material discovery, material composition/structure tailoring, catalyst identification and regeneration chemistry, which give rise to state-of-the-art hydrogen storage materials/technologies. Lithium tetrahydroborate-related materials exhibit the hitherto highest reversible hydrogen capacity via solid-gas reactions. Catalytic hydrolysis of sodium tetrahydroborate offers an on-demand hydrogen generation system for vehicular applications. Ammonia borane-related materials exhibit a satisfactory combination of material properties that are suited for on-board hydrogen sources, coupled with significant advances in spent fuels regeneration. This Perspective discusses the current progresses of these representative reversible or irreversible material systems, aiming at providing an outline of the forefront of hydrogen storage materials/technologies for transportation applications.
"But the viability of any chemical hydrogen storage system depends not only on its dehydrogenation performance, but also on the recyclability of the hydride materials. Currently, owing to the lack of energyefficient and cost-effective routes for spent fuel regeneration, the boron-containing chemical hydrides are greatly limited in the practical hydrogen storage applications . This situation has motivated the development of affordable hydrogen generation (HG) system using cheap and/or renewable materials . "
[Show abstract][Hide abstract] ABSTRACT: Aluminum/water reaction system has gained considerable attention for potential hydrogen storage applications. In this paper, we report a new aluminum-based hydrogen generation system that is composed of aluminum/sodium hydroxide/sodium stannate solid mixture and water. This new system is characterized by the features as follows: the combined usage of sodium hydroxide and sodium stannate promoters, the use of solid fuel in a tablet form and the direct use of water as a reaction controlling agent. The factors that influence the hydrogen generation performance of the system were investigated. The optimized system exhibits a favorable combination of high hydrogen generation rate, high fuel conversion, rapid dynamic response, which makes it promising for portable hydrogen source applications.
International Journal of Hydrogen Energy 04/2012; 37(7):5811–5816. DOI:10.1016/j.ijhydene.2011.12.157 · 3.31 Impact Factor
"However, the dehydrogenation of solidstate AB proceeds at a rather slow rate along with the emission of volatile impurities . These drawbacks may be related to its electron donoreacceptor complex structure where the lone pair electrons of the NH 3 group interact with the empty P z -orbital of B in the BH 3 group . Hence, improving the kinetics below 100 C and avoiding undesirable volatile products are the challenging technical barriers for onboard protonexchange membrane fuel cell applications. "
[Show abstract][Hide abstract] ABSTRACT: The study of ammonia borane (AB) with controllable dehydrogenations is an active research topic for solid-state hydrogen storage materials. The present work shows that tuning the reactivity of both B–H and N–H bonds in AB by alkaline earth metal chlorides not only results in a significantly decrease in the onset dehydrogenation temperature to 40 °C but also suppresses undesirable volatile by-products due to the incorporation of alkaline earth metal chlorides in the AB dehydrogenation process. These results provide further insights into the promotion of hydrogen release from amidoboranes and related borohydride ammine complexes.
International Journal of Hydrogen Energy 03/2012; 37(5):4274–4279. DOI:10.1016/j.ijhydene.2011.11.146 · 3.31 Impact Factor
"Recently, lithium borohydride (LiBH 4 ) has received considerable interest as a potential hydrogen storage medium due to its extremely high hydrogen capacity (18.3 wt%)      . However, the reversible dehydrogenation of LiBH 4 (Eq. "
[Show abstract][Hide abstract] ABSTRACT: Various LiBH4/carbon (graphite (G), purified single-walled carbon nanotubes (SWNTs) and activated carbon (AC)) composites were prepared by mechanical milling method and further examined with respect to their hydrogen storage properties. It was found that all the carbon additives can improve the H-exchange kinetics and H-capacity of LiBH4 to some extents. Compared with G, SWNTs and AC exhibited better promoting effect on the hydrogen storage properties of LiBH4. Based on combined property/phase/structure analysis results, the promoting effect of the carbon additives was largely attributed to their heterogeneous nucleation and micro-confinement effect on the reversible dehydrogenation of LiBH4.
International Journal of Hydrogen Energy 08/2010; 35(15-35):8247-8252. DOI:10.1016/j.ijhydene.2009.12.037 · 3.31 Impact Factor
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.