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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)
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2008-03-13
DOI10.1021/jp709814b
Volume112Issue:10Pages:4005-4010
Indexed BySCI
SubtypeArticle
Department15
Funding Project1504,1501
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordLIBH4 ; BOROHYDRIDE ; RELEASE ; SYSTEMS ; IMIDES
AbstractThe 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.
Language英语
URL查看原文
WOS IDWOS:000253784400075
Citation statistics
Cited Times:56[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/99973
Collection中国科学院大连化学物理研究所
Corresponding AuthorZhang Y(张耀); Zhang Y(张耀)
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, Dept Aerosp Catalysis & New Mat, Dalian 116023, Peoples R China
Recommended Citation
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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