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Sodium hydrazinidoborane: a chemical hydrogen-storage material
Romain Moury1, Umit B Demirci, Takayuki Ichikawa
1IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM2), Universite Montpellier 2, Place E. Bataillon, 34095, Montpellier, France.
Chemsuschem
|March 1, 2013
Summary
Researchers synthesized sodium hydrazinidoborane, a novel material for chemical hydrogen storage. This compound exhibits improved dehydrogenation properties compared to hydrazine borane, releasing significant hydrogen at low temperatures.
Area of Science:
- Materials Science
- Chemical Engineering
- Inorganic Chemistry
Background:
- Chemical hydrogen storage is crucial for developing clean energy technologies.
- Hydrazine borane (N2H4BH3) is a potential hydrogen storage material but has limitations.
- Improving the efficiency and safety of hydrogen release from such materials is an ongoing challenge.
Purpose of the Study:
- To synthesize and characterize a new material for chemical hydrogen storage.
- To evaluate the hydrogen release properties of the synthesized material.
- To compare its performance with existing materials like hydrazine borane.
Main Methods:
- Synthesis via low-temperature ball-milling of hydrazine borane and sodium hydride under argon.
- Characterization using (11)B magic-angle-spinning nuclear magnetic resonance spectroscopy, infrared spectroscopy, and powder X-ray diffraction.
- Thermal stability and dehydrogenation properties assessed by thermogravimetric analysis, differential scanning calorimetry, and prolonged heating experiments.
Main Results:
- Successful synthesis of sodium hydrazinidoborane (NaN2H3BH3) with 8.85 wt % hydrogen content.
- Material begins liberating hydrogen below 60 °C, with a 7.6 wt % mass loss between 60-150 °C.
- Demonstrated improved dehydrogenation properties compared to hydrazine borane.
Conclusions:
- Sodium hydrazinidoborane is a promising new material for chemical hydrogen storage.
- Its favorable dehydrogenation characteristics at low temperatures make it suitable for practical applications.
- Further research into its potential for energy storage is warranted.
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