中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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://WOS:000254899700027
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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