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The dehydrogenation performance and reaction mechanisms of Li3AlH6 with TiF3 additive
Liu, Shu-Sheng1,2; Zhang, Yao1; Sun, Li-Xian1; Zhang, Jian1; Zhao, Jun-Ning1; Xu, Fen3; Huang, Feng-Lei4
关键词Dehydrogenation Titanium Fluoride Alanate Kinetic Mechanism
刊名INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
2010-05-01
DOI10.1016/j.ijhydene.2009.12.108
35期:10页:4554-4561
收录类别SCI
文章类型Article
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
关键词[WOS]REVERSIBLE HYDROGEN STORAGE ; THERMODYNAMIC PROPERTIES ; THERMAL-DECOMPOSITION ; DOPED NAALH4 ; AL-TI ; LIALH4 ; HYDRIDE ; STABILITY ; CATALYST ; DESORPTION
英文摘要For Li3AlH6 prepared by mechanical milling method, the dissociation reaction enthalpy and activation energy are calculated to be 22.1 kJ mol(-1) H-2 and 133.7 +/- 2.7 kJ moll, respectively. The dehydrogenation performance of Li3AlH6 is greatly enhanced by TiF3 additive, especially in the kinetic behaviors. For the Li3AlH6 + 10 mol% TiF3 sample, the starting temperature of dehydrogenation is obviously decreased by 60 degrees C from that of pure Li3AlH6 (190 degrees C), and 3.0 wt.% H-2 may be released within 1000 s at 120 degrees C under an initial vacuum. With the amount of TiF3 increasing, the starting temperature decreases and the kinetics improves due to the decrease in the activation energy. The X-ray diffraction (XRD) together with thermogravimetric analysis (TGA) results show that there are three mechanochemical reactions involved during milling: i) Li3AlH6 + TiF3 -> 3 LiF + Al + Ti + 3H(2), ii) Ti + H-2 TiH2, iii) 3 Al + Ti -> Al3Ti. The in-situ formed Ti species (TiH2 and Al3Ti) co-catalyze the thermal dehydrogenation of Li3AlH6. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000278418700012
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141647
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Mat & Thermochem Lab, Dalian Inst Chem Phys, 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.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
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Liu, Shu-Sheng,Zhang, Yao,Sun, Li-Xian,et al. The dehydrogenation performance and reaction mechanisms of Li3AlH6 with TiF3 additive[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(10):4554-4561.
APA Liu, Shu-Sheng.,Zhang, Yao.,Sun, Li-Xian.,Zhang, Jian.,Zhao, Jun-Ning.,...&Huang, Feng-Lei.(2010).The dehydrogenation performance and reaction mechanisms of Li3AlH6 with TiF3 additive.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,35(10),4554-4561.
MLA Liu, Shu-Sheng,et al."The dehydrogenation performance and reaction mechanisms of Li3AlH6 with TiF3 additive".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35.10(2010):4554-4561.
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