Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2

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	Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2
	C. Z. Wu; P. Wang; X. D. Yao; C. Liu; D. M. Chen; G. Q. Lu; H. M. Cheng
	2005
发表期刊	Journal of Physical Chemistry B
ISSN	1520-6106
卷号	109 期号:47 页码:22217-22221
摘要	The microstructure and absorption/desorption characteristics of composite M-H, and 5 wt % as-prepared single-walled carbon nanotubes (MgH2-5ap) obtained by the mechanical grinding method were investigated. Experimental results show that the MgH2-5ap sample exhibits faster absorption kinetics and relatively lower desorption temperature than pure MgH2 or MgH2-purified single-walled carbon nanotube composite. Storage capacities of 6.0 and 4.2 wt % hydrogen for the MgH2-5ap composite were achieved in 60 min at 423 and 373 K, respectively. Furthermore, its desorption temperature was reduced by 70 K due to the introduction of as-prepared single-walled carbon nanotubes (SWNTs). In addition, the different effects of SWNTs and metallic catalysts contained in the as-prepared SWNTs were also investigated and a hydrogenation mechanism was proposed. It is suggested that metallic particles may be mainly responsible for the improvement of the hydrogen absorption kinetics, and SWNTs for the enhancement of hydrogen absorption capacity of MgH2.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. univ queensland, arc ctr funct nanomat, sch engn, brisbane, qld 4072, australia.;cheng, hm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;cheng@imr.ac.cn
关键词	Walled Carbon Nanotubes Hydriding Properties Storage Magnesium Composite Sorption Graphite Kinetics System
URL	查看原文
WOS记录号	WOS:000233684500021
引用统计	被引频次：103[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35109
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Z. Wu,P. Wang,X. D. Yao,et al. Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2[J]. Journal of Physical Chemistry B,2005,109(47):22217-22221.
APA	C. Z. Wu.,P. Wang.,X. D. Yao.,C. Liu.,D. M. Chen.,...&H. M. Cheng.(2005).Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2.Journal of Physical Chemistry B,109(47),22217-22221.
MLA	C. Z. Wu,et al."Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2".Journal of Physical Chemistry B 109.47(2005):22217-22221.