Efficient Synthesis of an Aluminum Amidoborane Ammoniate

Energies

Junzhi Yang¹  Paul R. Beaumont²  Terry D. Humphries³  Craig M. Jensen²  Xingguo Li¹ 

[1] Beijing National Laboratory for Molecular Sciences (BNLMS), the State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China; E-Mail:;Department of Chemistry, University of Hawaii at Manoa, 2545 McCarthy Mall, Honolulu, HI 96822-2275, USA; E-Mail:;Hydrogen Storage Research Group, Fuels and Energy Technology Institute, Department of Physics, Astronomy and Medical Radiation Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia; E-Mail:

关键词: aluminum;    amidoborane;    boranes;    dehydrogenation;    hydrogen storage;    synthetic methods;    Nuclear Magnetic Resonance Spectroscopy (NMR);   

DOI  :  10.3390/en8099107

来源: mdpi

【 摘 要 】

A novel species of metal amidoborane ammoniate, [Al(NH₂BH₃)₆³⁻][Al(NH₃)₆³⁺] has been successfully synthesized in up to 95% via the one-step reaction of AlH₃·OEt₂ with liquid NH₃BH₃·nNH₃ (n = 1~6) at 0 °C. This solution based reaction method provides an alternative pathway to the traditional mechano-chemical ball milling methods, avoiding possible decomposition. MAS ²⁷Al NMR spectroscopy confirms the formulation of the compound as an Al(NH₂BH₃)₆³⁻ complex anion and an Al(NH₃)₆³⁺ cation. Initial dehydrogenation studies of this aluminum based M-N-B-H compound demonstrate that hydrogen is released at temperatures as low as 65 °C, totaling ~8.6 equivalents of H₂ (10.3 wt %) upon heating to 105 °C. This method of synthesis offers a promising route towards the large scale production of metal amidoborane ammoniate moieties.

【 授权许可】

CC BY   
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