Hydrogen sorption kinetics of MgH2 catalyzed with NbF5
文献类型：期刊论文
| 作者 | Y. Luo ; P. Wang ; L. P. Ma ; H. M. Cheng |
| 刊名 | Journal of Alloys and Compounds
 |
| 出版日期 | 2008 |
| 卷号 | 453期号:1-2页码:138-142 |
| 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 |
| ISSN号 | 0925-8388 |
| 中文摘要 | 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. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/33006]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 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. |
| 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. |
| MLA | Y. Luo,et al."Hydrogen sorption kinetics of MgH2 catalyzed with NbF5".Journal of Alloys and Compounds 453.1-2(2008):138-142. |
入库方式： OAI收割
来源：金属研究所
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