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Enhanced hydrogen storage performance of LiBH4-SiO2-TiF3 composite
Zhang, Yao; Zhang, Wan-Sheng; Fan, Mei-Qiang; Liu, Shu-Sheng; Chu, Hai-Liang; Zhang, Yan-Hua; Gao, Xiu-Ying; Sun, Li-Xian; Zhang Y(张耀); Zhang Y(张耀)
刊名JOURNAL OF PHYSICAL CHEMISTRY C
2008-03-13
DOI10.1021/jp709814b
112期:10页:4005-4010
收录类别SCI
文章类型Article
部门归属15
项目归属1504,1501
产权排名1;1
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]LIBH4 ; BOROHYDRIDE ; RELEASE ; SYSTEMS ; IMIDES
英文摘要The destabilization approach for SiO2-doped LiBH4 hydrogen storage composite is identified as 4LiBH(4) + 2SiO(2) -> Li4SiO4 + 4B + Si + 8H(2), and Li4SiO4 is the thermodynamic obstacle for its reverse action. TiF3 was doped in the composite for avoiding the formation of Li4SiO4 and thus enhancing the reversible hydrogen storage properties. Experimental analysis on LiBH4-SiO2-TiF3 composite was performed via thermogravimetry (TG), temperature programmed desorption (TPD), mass spectral analysis (MS), differential scanning calorimetry (DSC), isothermal sorption, and powder X-ray diffraction (XRD). For LiBH4-20 wt % SiO2-30 wt % TiF3 composite, the dehydrogenation temperature starts from 70 degrees C and decreases by an average of 100 degrees C from that of LiBH4-20 wt % SiO2- Its maximum amount attains 8.3 wt % below 500 degrees C. The whole dehydrogenation can be regarded as a two-step process: (i) preferential reaction (3LiBH(4) + TiF3 - 3LiF + TiB2 + B + 6H(2)) occurring at around 70 degrees C, and (ii) principal reactions occurring simultaneously both at interface (LiBH4 + TiF3 + SiO2) and inside the bulk (self-decomposition of LiBH4). Doped TiF3 noticeably reduces the energy activation of the reaction at interface. However, the reaction inside the bulk is the rate-controlled process. This composite also demonstrates the ability of rehydrogenation under the pressure of 4.5 MPa. The hydrogen absorption is temperature-dependent and reaches 4 wt % H-2 within 14 000 s at 500 degrees C.
语种英语
原文出处查看原文
WOS记录号WOS:000253784400075
引用统计
被引频次:55[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/99973
专题中国科学院大连化学物理研究所
通讯作者Zhang Y(张耀); Zhang Y(张耀)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Dept Aerosp Catalysis & New Mat, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Yao,Zhang, Wan-Sheng,Fan, Mei-Qiang,et al. Enhanced hydrogen storage performance of LiBH4-SiO2-TiF3 composite[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(10):4005-4010.
APA Zhang, Yao.,Zhang, Wan-Sheng.,Fan, Mei-Qiang.,Liu, Shu-Sheng.,Chu, Hai-Liang.,...&张耀.(2008).Enhanced hydrogen storage performance of LiBH4-SiO2-TiF3 composite.JOURNAL OF PHYSICAL CHEMISTRY C,112(10),4005-4010.
MLA Zhang, Yao,et al."Enhanced hydrogen storage performance of LiBH4-SiO2-TiF3 composite".JOURNAL OF PHYSICAL CHEMISTRY C 112.10(2008):4005-4010.
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