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Hydrogen storage in single-walled carbon nanotubes at room temperature
MedLine Citation:
PMID:  10550044     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Masses of single-walled carbon nanotubes (SWNTs) with a large mean diameter of about 1.85 nanometers, synthesized by a semicontinuous hydrogen arc discharge method, were employed for hydrogen adsorption experiments in their as-prepared and pretreated states. A hydrogen storage capacity of 4.2 weight percent, or a hydrogen to carbon atom ratio of 0.52, was achieved reproducibly at room temperature under a modestly high pressure (about 10 megapascal) for a SWNT sample of about 500 milligram weight that was soaked in hydrochloric acid and then heat-treated in vacuum. Moreover, 78.3 percent of the adsorbed hydrogen (3.3 weight percent) could be released under ambient pressure at room temperature, while the release of the residual stored hydrogen (0.9 weight percent) required some heating of the sample. Because the SWNTs can be easily produced and show reproducible and modestly high hydrogen uptake at room temperature, they show promise as an effective hydrogen storage material.
Authors:
Liu; Fan; Liu; Cong; Cheng; Dresselhaus
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Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  286     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  1999 Nov 
Date Detail:
Created Date:  1999-11-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  UNITED STATES    
Other Details:
Languages:  Eng     Pagination:  1127-9     Citation Subset:  -    
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110015, China. State Key Lab for Rapidly Solidified Non-equilibrium Alloys, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110015,
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