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题名: Hydriding/dehydriding properties of MgH2/5 wt.% Ni coated CNFs composite
作者: Wu, C. Z.1;  Yao, X. D.2, 3;  Zhang, H.4
通讯作者: 吴成章
关键词: Hydrogen storage materials ;  Magnesium hydride ;  Ni coated CNFs ;  Composites ;  Ball milling
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2010
DOI: 10.1016/j.ijhydene.2009.10.079
卷: 35, 期:1, 页:247-252
收录类别: SCI
文章类型: Article
部门归属: 19
项目归属: 1901
产权排名: 1;1
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
英文摘要: In this paper, we reported that the prepared nickel coated carbon nanofibers (NiCNFs) by electroless plating method exhibited superior catalytic effect on hydrogen absorption/desorption of magnesium (Mg). It is demonstrated that the nanocomposites of MgH2/5 wt.% NiCNFs prepared by ball milling could absorb hydrogen very fast at low temperatures, e.g. absorb similar to 6.0 wt.% hydrogen in 5 min at 473 K and similar to 5.0 wt.% hydrogen in 10 min even at a temperature as low as 423 K. More importantly, the desorption of hydrogen was also significantly improved with additives of NiCNFs. Diffraction scanning calorimetry (DSC) measurement indicated that the peak desorption temperature decreased 50 K and the onset temperature for desorption decreased 123 K. The composites also desorbed hydrogen fast, e.g. desorb 5.5 wt.% hydrogen within 20 min at 573 K. It is suggested that the new phase of Mg2Ni, and the nano-sized dispersed distribution of Ni and carbon contributed to this significant improvement. Johnson-Mehl-Avrami (JMA) analysis illustrated that hydrogen diffusion is the rate-limiting step for hydrogen absorption/desorption. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: HYDROGEN STORAGE PROPERTIES ;  MAGNESIUM HYDRIDE ;  CARBON NANOTUBES ;  SORPTION ;  KINETICS ;  NB2O5 ;  MG ;  NANOCOMPOSITES ;  IMPROVEMENT ;  GRAPHITE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000274079200030
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103469
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Univ Queensland, Sch Engn, ARC Ctr Excellence Funct Nanomat, St Lucia, Qld 4072, Australia
3.Griffith Univ, Queensland Micro & Nanotechnol Ctr, Nathan, Qld 4072, Australia
4.Shenyang Inst Chem Technol, Sch Mat Sci & Engn, Shenyang 110142, Peoples R China

Recommended Citation:
Wu, C. Z.,Yao, X. D.,Zhang, H.. Hydriding/dehydriding properties of MgH2/5 wt.% Ni coated CNFs composite[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(1):247-252.
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