Synthesis of Diborane by the Hydrogenolysis of Trialkylborons<sup>1a</sup>

Klein, Ralph; Bliss, Arthur D.; Schoen, Louis J.; Nadeau, H. G.

doi:10.1021/ja01481a006

Cited by 7 publications

(3 citation statements)

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“…The thermal decomposition of diborane was relatively slow at temperatures below 200°C, whereas at higher temperatures the decomposition proceeded with a higher rate. In the work of Klein et al [20] the thermal decomposition of diborane was observed to occur above 80°C. The formation of borane increased with increasing temperature.…”

Section: Thermal Decomposition Of Diboranementioning

confidence: 97%

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Catalyst Deactivation in Diborane Decomposition

et al. 2005

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Section: Thermal Decomposition Of Diboranementioning

confidence: 97%

“…These proposed products correspond well with the product distribution obtained in the current study. If the mechanism is extended to contain also the pyrolysis of heavier boron hydrides, the formation of hexaborane can be explained (table 2, entries [15][16][17][18][19][20][21][22][23][24].…”

Section: Thermal Decomposition Of Diboranementioning

confidence: 99%

Catalyst Deactivation in Diborane Decomposition

et al. 2005

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“…Other reactants such as Fe, Mg, Ca, Na, B,C and so on, are also possible 4) via B(OR) 3 [143][144][145][146][147][148][149] …”

Section: Recycling From B-o-containing Materialsmentioning

confidence: 99%

Ammonia Borane and Related Compounds as Hydrogen Source Materials

Mertens

Wolf

Baitalow

2010

Handbook of Hydrogen Storage

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Mainly driven by the efforts of the automotive industry, a strong push towards new concepts to store hydrogen has occurred over recent years. Generally, in this framework, high hydrogen content materials have been of great interest for chemical storage concepts.From weight considerations, the most natural choice to develop hydrogen storage and source materials would be the use of first row element hydrides. Since a high valency allows more hydrogen to bond per atom, the mid-first row hydrides borane, methane, and ammonia with 21, 25, and 17.5 wt% are amongst the materials with the highest hydrogen contents. Although the thermodynamics is not favorable, due to the strong bond between carbon and hydrogen, the utilization of methane as a hydrogen source material has been widely investigated and small natural gas reformers for a fueling station to supply polymer electrolyte membrane (PEM) fuel cell vehicles with hydrogen have been developed [1].However, ammonia and boranes alone are also not very attractive as hydrogen source compounds because of thermodynamic considerations and the harm they potentially bring to fuel cell catalysts (PEM). The interesting fact that nitrogen and boron are on opposite sides of the electronegative-electropositive border line that runs through the periodic table, offers attractive new features to the ammonia borane adduct BH 3 NH 3 (AB). Especially, their ability to release hydrogen at low temperatures, combined with the very high hydrogen content, has brought these materials into the focus of recent research efforts.Besides the fact that the known world boron resources are insufficient to permanently fuel a significant portion of the world vehicle fleet, it is very clear from the energy expense needed for AB regeneration and the cost aspects that ammonia borane-based materials are not likely to become a means of mass hydrogen storage. These materials, however, can be of interest for small scale applications demanding very high hydrogen storage density, such as autonomously operated small electrical Handbook of Hydrogen Storage. Edited by Michael Hirscher j215 devices. Research efforts to put AB materials to use primarily encompass the control of the hydrogen release kinetics, the production of AB materials and the rehydrogenation of the spent materials.Since spent ammonia borane, or borazane as it is also called, and most of its derivatives are not easily rechargeable, for thermodynamic reasons, new recycling strategies need to be developed. An essential part of possible recycling schemes is the generation of hydridic, that is, negatively charged, hydrogen located at the boron centers. Because of the importance of borohydrides in organic synthesis and the recent developments in nonmetal-center-based hydrogen activation [2], the relevance of these research efforts is outside the area of hydrogen source and storage materials. Materials Description and Characterization

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