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

Wu, Chengzhang, Wang, Ping, Yao, Xiangdong, Liu, Chang, Chen, Demin, Lu, Gao Qing and Cheng, Huiming (2005) Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2. Journal of Physical Chemistry B, 109 47: 22217-22221. doi:10.1021/jp0545041


Author Wu, Chengzhang
Wang, Ping
Yao, Xiangdong
Liu, Chang
Chen, Demin
Lu, Gao Qing
Cheng, Huiming
Title Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2
Formatted title
Effects of SWNT and metallic catalyst on hydrogen absorption/desorption performance of MgH2
Journal name Journal of Physical Chemistry B   Check publisher's open access policy
ISSN 1520-6106
1520-5207
Publication date 2005-12-01
Sub-type Article (original research)
DOI 10.1021/jp0545041
Volume 109
Issue 47
Start page 22217
End page 22221
Total pages 5
Editor George C. Schatz
Place of publication Washington, DC, U. S. A.
Publisher American Chemical Society
Collection year 2005
Language eng
Subject C1
291804 Nanotechnology
620107 Cotton
0306 Physical Chemistry (incl. Structural)
Formatted abstract
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.
© 2005 American Chemical Society
Keyword Chemistry, physical
Walled carbon nanotubes
Hydriding properties
Storage
Magnesium
Composite
Sorption
Graphite
Kinetics
System
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 07:50:21 EST