High H <sub>2</sub> Uptake by Alkali-Doped Carbon Nanotubes Under Ambient Pressure and Moderate Temperatures
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- P. Chen
- Physics Department, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
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- X. Wu
- Physics Department, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
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- J. Lin
- Physics Department, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
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- K. L. Tan
- Physics Department, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
書誌事項
- 公開日
- 1999-07-02
- DOI
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- 10.1126/science.285.5424.91
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:p>Lithium- or potassium-doped carbon nanotubes can absorb ∼20 or ∼14 weight percent of hydrogen at moderate (200° to 400°C) or room temperatures, respectively, under ambient pressure. These values are greater than those of metal hydride and cryoadsorption systems. The hydrogen stored in the lithium- or potassium-doped carbon nanotubes can be released at higher temperatures, and the sorption-desorption cycle can be repeated with little decrease in the sorption capacity. The high hydrogen-uptake capacity of these systems may be derived from the special open-edged, layered structure of the carbon nanotubes made from methane, as well as the catalytic effect of alkali metals.</jats:p>
収録刊行物
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- Science
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Science 285 (5424), 91-93, 1999-07-02
American Association for the Advancement of Science (AAAS)