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学科主题: 物理化学
题名: Significantly improved dehydrogenation of LiAlH4 destabilized by K2TiF6
作者: Li, Zhibao1, 2;  Liu, Shusheng1, 2;  Si, Xiaoliang1, 2;  Zhang, Jian1;  Jiao, Chengli1, 2;  Wang, Shuang1, 2;  Liu, Shuang1, 2;  Zou, Yong-Jin4;  Sun, Lixian1, 4;  Xu, Fen3
通讯作者: 孙立贤 ;  徐芬
关键词: K2TiF6 ;  LiAlH4 ;  Catalysis ;  Complex hydride ;  Hydrogen storage
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2012-02-01
DOI: 10.1016/j.ijhydene.2011.10.038
卷: 37, 期:4, 页:3261-3267
收录类别: SCI
文章类型: Article
部门归属: DNL19
项目归属: DNL1903
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: The effects of K2TiF6 on the dehydrogenation properties of LiAlH4 were investigated by solid-state ball milling. The onset decomposition temperature of 0.8 mol% K2TiF6 doped LiAlH4 is as low as 65 degrees C that 85 degrees C lower than that of pristine LiAlH4. Isothermal dehydrogenation properties of the doped LiAlH4 were studied by PCT (pressure-composition-temperature). The results show that, for the 0.8 mol% K2TiF6 doped LiAlH4 that dehydrogenated at 90 degrees C, 4.4 wt% and 6.0 wt% of hydrogen can be released in 60 min and 300 min, respectively. When temperature was increased to 120 degrees C, the doped LiAlH4 can finish its first two dehydrogenation steps in 170 min. DSC results show that the apparent activation energy (E-a) for the first two dehydrogenation steps of LiAlH4 are both reduced, and XRD results suggest that TiH2, Al3Ti, LiF and KH are in situ formed, which are responsible for the improved dehydrogenation properties of LiAlH4. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: HYDROGEN STORAGE PROPERTIES ;  LITHIUM ALANATE ;  TI ;  CATALYST ;  HYDRIDES ;  LI3ALH6
语种: 英语
WOS记录号: WOS:000301615100029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/117892
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Liaoning Normal Univ, Fac Chem & Chem Engn, Dalian 116029, Peoples R China
4.Guilin Univ Elect Technol, Dept Mat Sci & Engn, Guilin 541004, Peoples R China

Recommended Citation:
Li, Zhibao,Liu, Shusheng,Si, Xiaoliang,et al. Significantly improved dehydrogenation of LiAlH4 destabilized by K2TiF6[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2012,37(4):3261-3267.
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