title: Sodium hydrazinidoborane: a chemical hydrogen-storage material.
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 .
authors: IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM2), Universite Montpellier 2, Place E. Bataillon, 34095, Montpellier, France.
authors: Romain
authors: R
authors: Moury
authors: Umit B
authors: UB
authors: Demirci
authors: Takayuki
authors: T
authors: Ichikawa
authors: Yaroslav
authors: Y
authors: Filinchuk
authors: Rodica
authors: R
authors: Chiriac
authors: Arie
authors: A
authors: van der Lee
authors: Philippe
authors: P
authors: Miele
mesh_terms: D001880:Boranes / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D006358:Hot Temperature; D006834:Hydrazines / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D017670:Sodium Compounds / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013818:Thermogravimetry
chemical_list: D001880:Boranes; D006834:Hydrazines; D017670:Sodium Compounds; C524957:sodium hydride; D006859:Hydrogen