Sodium Hydrazinidoborane: A Chemical Hydrogen-Storage Material

ChemSusChem. 2013 Apr;6(4):667-73. doi: 10.1002/cssc.201200800. Epub 2013 Feb 27.

Abstract

Herein, we present the successful synthesis and full characterization (by (11) B magic-angle-spinning nuclear magnetic resonance spectroscopy, infrared spectroscopy, powder X-ray diffraction) of sodium hydrazinidoborane (NaN2 H3 BH3 , with a hydrogen content of 8.85 wt %), a new material for chemical hydrogen storage. Using lab-prepared pure hydrazine borane (N2 H4 BH3 ) and commercial sodium hydride as precursors, sodium hydrazinidoborane was synthesized by ball-milling at low temperature (-30 °C) under an argon atmosphere. Its thermal stability was assessed by thermogravimetric analysis and differential scanning calorimetry. It was found that under heating sodium hydrazinidoborane starts to liberate hydrogen below 60 °C. Within the range of 60-150 °C, the overall mass loss is as high as 7.6 wt %. Relative to the parent N2 H4 BH3 , sodium hydrazinidoborane shows improved dehydrogenation properties, further confirmed by dehydrogenation experiments under prolonged heating at constant temperatures of 80, 90, 95, 100, and 110 °C. Hence, sodium hydrazinidoborane appears to be more suitable for chemical hydrogen storage than N2 H4 BH3 .

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Boranes / chemistry*
  • Calorimetry, Differential Scanning
  • Hot Temperature
  • Hydrazines / chemistry*
  • Hydrogen / chemistry*
  • Magnetic Resonance Spectroscopy
  • Sodium Compounds / chemistry
  • Spectrophotometry, Infrared
  • Thermogravimetry

Substances

  • Boranes
  • Hydrazines
  • Sodium Compounds
  • sodium hydride
  • Hydrogen