4.7 Article

New synthetic procedure for NaNH2(BH3)2 and evaluation of its hydrogen storage properties

期刊

SCIENCE CHINA-CHEMISTRY
卷 58, 期 1, 页码 169-173

出版社

SCIENCE PRESS
DOI: 10.1007/s11426-014-5268-7

关键词

ammonia borane; aminodiborane; dehydrogenation; hydrogen storage

资金

  1. National Natural Science Foundation of China [U1232120, 21273229]
  2. Australian Research Council Discovery Early Career Research Award [DE120101496]

向作者/读者索取更多资源

Tremendous efforts have been devoted to the synthesis of new light element hydrides for hydrogen storage. Ammonia borane (AB) is a promising candidate possessing high hydrogen capacity and low dehydrogenation temperature. The step-wise dehydrogenation and release of by-products, however, are obstacles to its practical application. Chemical modifications of AB to synthesize new compounds or its derivatives are of practical and fundamental importance. Here we report an improved synthesis of sodium aminodiborane (NaNH2(BH3)(2), NaABB), a derivative of ammonia borane. This procedure leads to high purity NaABB by reacting NaNH2 and 2 eq. AB. The dehydrogenation properties have been investigated by means of temperature programmed desorption-mass spectrometry, volumetric release, nuclear magnetic resonance, Fourier transform infrared spectroscopy, and X-ray diffraction. In a closed vessel, NaABB can release similar to 2 eq. H-2 when heated at 271 A degrees C, forming solid products of NaBH4 and highly condensed polyborazylene.

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