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Efficient Synthesis of an Aluminum Amidoborane Ammoniate

Author

Listed:
  • Junzhi Yang

    (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)

  • Paul R. Beaumont

    (Department of Chemistry, University of Hawaii at Manoa, 2545 McCarthy Mall, Honolulu, HI 96822-2275, USA)

  • Terry D. Humphries

    (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)

  • Craig M. Jensen

    (Department of Chemistry, University of Hawaii at Manoa, 2545 McCarthy Mall, Honolulu, HI 96822-2275, USA)

  • Xingguo Li

    (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)

Abstract

A novel species of metal amidoborane ammoniate, [Al(NH 2 BH 3 ) 6 3− ][Al(NH 3 ) 6 3+ ] has been successfully synthesized in up to 95% via the one-step reaction of AlH 3 ·OEt 2 with liquid NH 3 BH 3 · n NH 3 (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 27 Al NMR spectroscopy confirms the formulation of the compound as an Al(NH 2 BH 3 ) 6 3− complex anion and an Al(NH 3 ) 6 3+ 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 H 2 (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.

Suggested Citation

  • Junzhi Yang & Paul R. Beaumont & Terry D. Humphries & Craig M. Jensen & Xingguo Li, 2015. "Efficient Synthesis of an Aluminum Amidoborane Ammoniate," Energies, MDPI, vol. 8(9), pages 1-10, August.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:9:p:9107-9116:d:54805
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    Citations

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    Cited by:

    1. Carlos A. Castilla-Martinez & Romain Moury & Salem Ould-Amara & Umit B. Demirci, 2021. "Destabilization of Boron-Based Compounds for Hydrogen Storage in the Solid-State: Recent Advances," Energies, MDPI, vol. 14(21), pages 1-50, October.
    2. Craig M. Jensen & Etsuo Akiba & Hai-Wen Li, 2016. "Hydrides: Fundamentals and Applications," Energies, MDPI, vol. 9(4), pages 1-2, April.

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