| Hydrogen sorption kinetics of MgH2 catalyzed with NbF5 |
| Y. Luo; P. Wang; L. P. Ma; H. M. Cheng
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| 2008
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| 发表期刊 | Journal of Alloys and Compounds
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| ISSN | 0925-8388
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| 卷号 | 453期号:1-2页码:138-142 |
| 摘要 | The influence of NbF5 as an additive on the H-sorption kinetics of MgH2 was investigated. We found that the hydrogen sorption capacity and sorption kinetics of the composites were dependent on the addition amount of NbF5 as well as the milling time. Fast kinetics are obtained using 2 mol% NbF5. At 573 K, the MgH2+2 mol% NbF5 milled for 5h can absorb 5wt.% hydrogen in 12s and 6wt.% in 60 min, and desorb 4.4 wt.% in 10 min and 5 wt.% in 60 min. DSC examination indicates that the desorption temperature is reduced by 64 K, and the activation energy for hydrogen desorption is estimated to be similar to 90 kJ/mol H-2 from the Kissinger Plot, indicating that MgH2 is significantly activated due to the catalytic effect of NbF5. Furthermore, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were performed to characterize the structural evolution upon milling and dehydrogenation. (C) 2006 Elsevier B.V. All rights reserved. |
| 部门归属 | [luo, ye; wang, ping; ma, lai-peng; cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;cheng, hm (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;cheng@imr.ac.cn
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| 关键词 | Hydrogen Storage
Magnesium Hydride
High-energy Ball Milling
Niobium
Fluoride
Xps
Transition-metals
Magnesium
Storage
Nb2o5
Composite
Nanocomposites
Improvement
Mechanism
System
Ni
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| URL | 查看原文
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| WOS记录号 | WOS:000254899700027
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/33006
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
Y. Luo,P. Wang,L. P. Ma,et al. Hydrogen sorption kinetics of MgH2 catalyzed with NbF5[J]. Journal of Alloys and Compounds,2008,453(1-2):138-142.
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| APA |
Y. Luo,P. Wang,L. P. Ma,&H. M. Cheng.(2008).Hydrogen sorption kinetics of MgH2 catalyzed with NbF5.Journal of Alloys and Compounds,453(1-2),138-142.
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| MLA |
Y. Luo,et al."Hydrogen sorption kinetics of MgH2 catalyzed with NbF5".Journal of Alloys and Compounds 453.1-2(2008):138-142.
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