Journal
SCIENCE
Volume 331, Issue 6023, Pages 1426-1429Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1199003
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- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy
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Ammonia borane (H3N-BH3, AB) is a lightweight material containing a high density of hydrogen (H-2) that can be readily liberated for use in fuel cell-powered applications. However, in the absence of a straightforward, efficient method for regenerating AB from dehydrogenated polymeric spent fuel, its full potential as a viable H-2 storage material will not be realized. We demonstrate that the spent fuel type derived from the removal of greater than two equivalents of H-2 per molecule of AB (i.e., polyborazylene, PB) can be converted back to AB nearly quantitatively by 24-hour treatment with hydrazine (N2H4) in liquid ammonia (NH3) at 40 degrees C in a sealed pressure vessel.
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