标题
作者
作者:Huang, JM (Huang, Jianmei)[1,2 ]; Ouyang, LZ (Ouyang, Liuzhang)[1,2 ]; Gu, QF (Gu, Qinfen)[4 ]; Yu, XB (Yu, Xuebin)[3 ]; Zhu, M (Zhu, Min)[1,2 ]
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文献类型:Article
摘要
Due to its high hydrogen density (14.8 wt%) and low dehydrogenation peak temperature (130 degrees C), Zr(BH4)(4)center dot 8NH(3) is considered to be one of the most promising hydrogen-storage materials. To further decrease its dehydrogenation temperature and suppress its ammonia release, a strategy of introducing LiBH4 and Mg(BH4)(2) was applied to this system. Zr(BH4)(4)center dot 8NH(3)-4 LiBH4 and Zr(BH4)(4)center dot 8NH(3)-2Mg(BH4)(2) composites showed main dehydrogenation peaks centered at 81 and 106 degrees C as well as high hydrogen purities of 99.3 and 99.8 mol% H-2, respectively. Isothermal measurements showed that 6.6 wt% (within 60 min) and 5.5 wt% (within 360 min) of hydrogen were released at 100 degrees C from Zr(BH4)(4)center dot 8NH(3)-4LiBH(4) and Zr(BH4)(4)center dot 8NH(3)-2Mg(BH4)(2), respectively. The lower dehydrogenation temperatures and improved hydrogen purities could be attributed to the formation of the diammoniate of diborane for Zr(BH4)(4)center dot 8NH(3)-4LiBH(4), and the partial transfer of NH3 groups from Zr(BH4)(4)center dot 8NH(3) to Mg(BH4)(2) for Zr(BH4)(4)center dot 8NH(3)-2Mg(BH4)(2), which result in balanced numbers of BH4 and NH3 groups and a more active H delta+center dot center dot center dot H-delta interaction. These advanced dehydrogenation properties make these two composites promising candidates as hydrogen-storage materials.
关键词
作者关键词:borohydrides; hydrides; hydrogen; hydrogen storage; zirconium
作者信息
通讯作者地址:Ouyang, LZ (通讯作者)
![]() | S China Univ Technol, Sch Mat Sci & Engn, Wushan Rd, Guangzhou 510641, Guangdong, Peoples R China. |
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类别分类
研究方向:Chemistry
Web of Science 类别:Chemistry, Multidisciplinary