High H2 uptake by alkali-doped carbon nanotubes under ambient pressure and moderate temperatures
High H2 uptake by alkali-doped carbon nanotubes under ambient pressure and moderate temperatures
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DOI：
10.1126/science.285.5424.91
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发表时间：
1999-07-02
期刊：
影响因子：
56.9
通讯作者：
Tan, KL
中科院分区：
文献类型：
--
作者：
Chen, P;Wu, X;Tan, KL
锂或钾掺杂的碳纳米管可以分别在环境压力下在中等温度（200摄氏度至400摄氏度）或室温下吸收近似20重量%或近似14重量%的氢。这些值大于金属氢化物和低温吸附系统的值。锂或钾掺杂的碳纳米管中储存的氢可以在较高的温度下释放，并且可以重复吸附-解吸循环，而吸附容量几乎没有降低。这些体系的高吸氢能力可能来源于甲烷制得的碳纳米管特殊的开边层状结构以及碱金属的催化作用。
Lithium- or potassium-doped carbon nanotubes can absorb similar to 20 or similar to 14 weight percent of hydrogen at moderate (200 degrees to 400 degrees 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.