Direct mechanochemical formation of alkali metal borohydrides nanocrystals exhibiting kinetic and thermodynamic destabilizations

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• 作者：Yongtao Li ; Meinan Zhao ; Xiaoli Ding ; Dongming Liu ; Qingan Zhang ; ^{qazhang_ahut@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Hydrogen storage ; Mechanical milling ; Nanostructure ; Metal borohydrides
• 刊名：International Journal of Hydrogen Energy
• 出版年：2016
• 出版时间：30 January 2016
• 年：2016
• 卷：41
• 期：4
• 页码：2807-2813
• 全文大小：1678 K

文摘

The NaBH₄ nanocrystals (NCs) were successfully synthesized by mechanically driven anion metathesis between LiBH₄ and NaCl where the newly formed NaBH₄ has an approximately 10 nm in size being in situ embedded in the buffering matrix of LiCl byproduct. These NaBH₄ NCs obtained show significantly enhanced desorption properties with a reduction in onset temperature by 30%, over 6 times faster kinetics and nearly 4 times higher equilibrium pressure than those of micro-NaBH₄. This novel mechanochemical approach can also be employed to prepare other borohydrides NCs such as KBH₄.