Mechanistic studies of hydrogen release from solid amine borane materials

Mark Bowden, Tim Kemmitt, Wendy Shaw, Nancy Hess, John Linehan, Maciej Gutowski, Benjamin Schmid, Tom Autrey

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)


Ammonia borane (NH3BH3) is a molecular solid with a high volumetric and gravimetric density of hydrogen. We report room temperature structural data which shows how the freely rotating NH3 and BH 3 groups allow a N-H...H-B dihydrogen bond in which hydrogen atoms on adjacent molecules are separated by only 1.90Å. The initial decomposition of ammonia borane at 80-100°C into (NH2BH2) n and H2 has been studied by in-situ nmr spectroscopy and kinetic studies using isotopic substitution. The reaction proceeds by a bimolecular pathway involving a [NH3BH2NH 3]+BH4- intermediate with an activation energy of 136kJmol-1.

Original languageEnglish
Title of host publicationHydrogen Storage Materials
Number of pages6
Publication statusPublished - Dec 1 2006
Event2006 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 17 2006Apr 21 2006

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2006 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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