Study of Aluminoborane Compound AlB4H11 for Hydrogen Storage

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• 作者：Ji-Cheng Zhao ; Douglas A. Knight ; Gilbert M. Brown ; Chul Kim ; Son-Jong Hwang ; Joseph W. Reiter ; Robert C. Bowman ; ; Jason A. Zan ; James G. Kulleck
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：January 8, 2009
• 年：2009
• 卷：113
• 期：1
• 页码：2-11
• 全文大小：383K
• 年卷期：v.113,no.1(January 8, 2009)
• ISSN：1932-7455

文摘

Aluminoborane compounds AlB₄H₁₁, AlB₅H₁₂, and AlB₆H₁₃ were reported by Himpsl and Bond in 1981, but they have eluded the attention of the worldwide hydrogen storage research community for more than a quarter of a century. These aluminoborane compounds have very attractive properties for hydrogen storage: high hydrogen capacity (i.e., 13.5, 12.9, and 12.4 wt % H, respectively) and attractive hydrogen desorption temperature (i.e., AlB₄H₁₁ decomposes at ∼125 °C). We have synthesized AlB₄H₁₁ and studied its thermal desorption behavior using temperature-programmed desorption with mass spectrometry, gas volumetric (Sieverts) measurement, infrared (IR) spectroscopy, and solid state nuclear magnetic resonance (NMR). Rehydrogenation of hydrogen-desorbed products was performed and encouraging evidence of at least partial reversibility for hydrogenation at relatively mild conditions is observed. Our chemical analysis indicates that the formula for the compound is closer to AlB₄H₁₂ than AlB₄H₁₁.