Hydrogen adsorption/desorption behavior of multi-walled carbon nanotubes with different diameters

被引：146

作者：

Hou, PX ^{[1
]}

Xu, ST ^{[1
]}

Ying, Z ^{[1
]}

Yang, QH ^{[1
]}

Liu, C ^{[1
]}

Cheng, HM ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

CARBON | 2003年 / 41卷 / 13期

基金：

中国国家自然科学基金;

关键词：

carbon nanotubes; chemical vapor deposition; adsorption; transmission electron microscopy (TEM); adsorption properties;

D O I：

10.1016/S0008-6223(03)00271-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Multi-walled carbon nanotubes (MWNTs) with different mean outer diameters in the range of 13-53 nm, synthesized by the catalytic decomposition of hydrocarbons using a floating catalyst method, were purified and pretreated with the same procedure for volumetric hydrogen adsorption/desorption measurements. It was found that the hydrogen storage capacity of the purified and pretreated MWNTs was proportional to their diameter, and that hydrogen in all types of MWNTs measured could not be completely desorbed at room temperature and ambient pressure. A possible mechanism for the above behavior was proposed based on the results of cryogenic nitrogen adsorption analysis and high-resolution transmission electron microscopy observations. It was considered that small "carbon islands" might be the main hydrogen adsorption site in MWNTs. The effects of metal catalyst as well as an etched cavity on the surface of MWNTs on the hydrogen adsorption/desorption of MWNTs were also discussed. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2471 / 2476

页数：6

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