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作者
作者:Zhu, JY (Zhu, Jiuyi)[1,2 ]; Wang, H (Wang, Hui)[1,2 ]; Cai, WT (Cai, Weitong)[3 ]; Liu, JW (Liu, Jiangwen)[1,2 ]; Ouyang, LZ (Ouyang, Liuzhang)[1,2 ]; Zhu, M (Zhu, Min)[1,2 ]
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文献类型:Article
摘要
The effect of nanoscale h-BN addition by milling on the de-/re-hydrogenation of LiBH4 was investigated. With the increasing h-BN ratio, the milled LiBH4/h-BN composites showed lower dehydrogenation temperature. For the LiBH4-3BN composite (mole ratio 1:3), the onset dehydrogenation temperature was reduced from 290 degrees C for the milled pure LiBH4 down to 175 degrees C, and the initial dehydrogenation capacity could reach 3.1 wt.% (equivalent to 13.7 wt.% of the component LiBH4) within similar to 2 h at 400 degrees C. Under moderate rehydrogenation conditions of 400 degrees C and 10 MPa H-2 pressure, the 2nd and 3th cyclic dehydrogenation capacity of LiBH4-3BN composite almost remained unchanged, indicating remarkably improved rehydrogenation reversibility in comparison to milled pure LiBH4. FTIR analysis reveals specific interaction between h-BN and LiBH4 probably originating from the polar mechanism between polarizable B-H bond and B-N bond, which should be responsible for the enhanced dehydrogenation kinetics and reversibility. This work demonstrates the specific catalytic role of nanoscale h-BN and its potential for reversible hydrogen storage by compositing with high-capacity borohydrides. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
关键词
作者关键词:Hydrogen storage materials; LiBH4; h-BN; Dehydrogenation; Reversibility
作者信息
通讯作者地址:Wang, H (通讯作者)
 | South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China. |
| Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China. |
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类别分类
研究方向:Chemistry; Electrochemistry; Energy & Fuels
Web of Science 类别:Chemistry, Physical; Electrochemistry; Energy & Fuels