Hydrogen Desorption Reaction between Hydrogen-Containing Functional Groups and Lithium Hydride

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• 作者：Hiroki Miyaoka ; Takayuki Ichikawa ; Hironobu Fujii ; Yoshitsugu Kojima
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：May 13, 2010
• 年：2010
• 卷：114
• 期：18
• 页码：8668-8674
• 全文大小：298K
• 年卷期：v.114,no.18(May 13, 2010)
• ISSN：1932-7455

文摘

Three kinds of hydrogen-containing products were synthesized from hBN by ball-milling under hydrogen (H₂), methane (CH₄), and ammonia (NH₃) atmosphere, in which these products are named BN^nanoXH_x (X = C, N). BN^nanoH_x, BN^nanoCH_x, and BN^nanoNH_x desorbed H₂, CH₄, and NH₃, respectively, in the wide temperature range from 100 to 900 °C. From infrared spectroscopy for these products, the existence of some polarized functional groups such as B−H, C−H, or N−H bonds in the products was clarified. Afterward, the products were mixed with lithium hydride (LiH) to synthesize the composite by ball-milling. All the BN^nanoXH_x and LiH composites can release mainly H₂ around 200 °C, indicating that the hydrogenated states as the polarized functional groups in each product would be destabilized by an interaction with LiH. Therefore, the BN^nanoXH_x and LiH systems are recognized as a hydrogen storage system with H₂ release at relatively low temperature due to the characteristic interaction.