Improving Effects of LiH and Co-Catalyst on the Dehydrogenation of Li4BN3H10

详细信息    查看全文

• 作者：Xueli Zheng ; Zhitao Xiong ; Yonghao Lim ; Guotao Wu ; Ping Chen ; Hua Chen
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：May 5, 2011
• 年：2011
• 卷：115
• 期：17
• 页码：8840-8844
• 全文大小：760K
• 年卷期：v.115,no.17(May 5, 2011)
• ISSN：1932-7455

文摘

Improving effects of LiH and Co-catalyst on the dehydrogenation of Li₄BN₃H₁₀ were investigated in this work. It was found that 9.6 wt % or 5 equiv. moles of H₂ can be evolved from the promoted sample at 250 掳C, which is 110 掳C lower than that of pristine Li₄BN₃H₁₀. More importantly, NH₃ emission is depressed dramatically, with its concentration in hydrogen decreasing from 12 mol % to 0.008 mol % (or 80 ppm). Melting of Li₄BN₃H₁₀ is essential for one unit of LiNH₂ fleeing from the structure and interacting with LiH to evolve 1 equiv. mole of H₂, in the meantime, Co-catalyst takes effect on the dissociation of remaining Li₃BN₂H₈, resulting in the evolution of another 4 equiv. moles of H₂ at temperatures close to that of LiNH₂鈭扡iH.