Electrochemical quartz crystal microbalance studies of single-wall carbon nanotubes in aqueous and non-aqueous solutions
Electrochemical quartz crystal microbalance studies of single-wall carbon nanotubes in aqueous and non-aqueous solutions
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DOI：
10.1016/s0013-4686(00)00634-4
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发表时间：
2000-12-01
影响因子：
6.6
通讯作者：
Baughman, RH
中科院分区：
文献类型：
--
作者：
Barisci, JN;Wallace, GG;Baughman, RH
单壁碳纳米管膜在水溶液中的循环伏安法显示存在宽的氧化还原响应。在非水介质中，当电解质阳离子是四丁基铵时，不存在氧化还原过程。然而，在含Li+的有机电解质中，与锂插入相关的还原在窄的电位范围内发生。电化学石英晶体微天平在水溶液电解质的研究表明，电极质量增加，增加负电位。这些质量变化作为施加的电势的函数不与阳离子质量成正比，并且与双层充电相关联。对于具有大于Li+的阳离子的电解质，电极质量的变化小于所涉及的阴离子或阳离子的质量。当阳离子为四丁基铵时，在乙腈溶液中纳米管膜的质量变化与在水性电解质中观察到的质量变化相似。然而，Li+的溶液导致与阳离子插入相关的纳米管膜质量的大幅增加，这不容易逆转，反映出缓慢的Li+排出。(C)2000爱思唯尔科技有限公司版权所有。
The cyclic voltammetry of single-wall carbon nanotube films in aqueous solutions show the presence of broad redox responses. In non-aqueous media there is absence of redox processes when the electrolyte cation is tetrabutylammonium. However, in a Li+-containing organic electrolyte, reduction associated with lithium insertion occurs over a narrow potential range. Electrochemical quartz crystal microbalance studies in aqueous electrolytes show that the electrode mass increases with increasing negative potentials. These mass changes as a function of applied potential are not directly proportional to cation mass and are associated with double-layer charging. For electrolytes with cations larger than Li+, the change in electrode mass is smaller than the mass of the anions or cations involved. The mass changes of nanotube films in acetonitrile solutions are similar to those observed for aqueous electrolytes when the cation is tetrabutylammonium. However, solutions of Li+ cause a substantial increase in nanotube film mass associated with cation insertion, which is not readily reversed reflecting slow Li+ expulsion. (C) 2000 Elsevier Science Ltd. All rights reserved.