Hydrogen storage in single-walled carbon nanotubes at room temperature
Hydrogen storage in single-walled carbon nanotubes at room temperature
复制标题
室温下单壁碳纳米管储氢
DOI：
10.1126/science.286.5442.1127
复制
发表时间：
1999-11-05
期刊：
影响因子：
56.9
通讯作者：
Dresselhaus, MS
中科院分区：
文献类型：
--
作者：
Liu, C;Fan, YY;Dresselhaus, MS
采用连续氢弧放电法制备了平均直径约为1.85 nm的单壁碳纳米管（SWNTs），并对其制备态和预处理态进行了氢吸附实验。对于浸泡在盐酸中然后在真空中热处理的约500毫克重量的SWNT样品，在室温下在适度高压（约10兆帕）下可重复地实现4.2重量%的储氢容量或0.52的氢与碳原子比。此外，78.3%的吸附的氢（3.3%重量）可以在室温下在环境压力下释放，而剩余的存储的氢（0.9%重量）的释放需要一些加热的样品。由于单壁碳纳米管可以很容易地生产，并在室温下显示出可重复的和适度高的氢吸收，它们显示出作为一种有效的储氢材料的前景。
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.