Investigation of the Electrochemical and Electrocatalytic Behavior of Single-Wall Carbon Nanotube Film on a Glassy Carbon Electrode

Abstract

The electrochemical behavior of a film of single-wall carbon nanotubes (SWNTs) functionalized with carboxylic acid groups was studied extensively on a glassy carbon (GC) electrode. One stable couple corresponding to the redox of the carboxylic acid group, which was supported by XPS and IR experiments, was observed. The electrode process involved four electrons, while the rate-determining step was a one-electron reduction. The SWNT film-modified electrode showed favorable electrocatalytic behavior toward the oxidation of biomolecules such as dopamine, epinephrine, and ascorbic acid.

Insights into the surface and redox properties of single-walled carbon nanotube—cobalt(II) tetra-aminophthalocyanine self-assembled on gold electrode

“…It is important to note that our present results, as well as those of other works for SWCNT immobilised onto GCE [59] and MWCNT SAMs [13], contradict the notion that CNTs do not display reversible electrochemistry [11]. As proposed by Luo et al [61], SWCNT-modified GCE displays four-electron transfer reversible redox processes. These four-electron redox processes may explain the appearance of the redox peaks (I) and (II) ( (Figs.…”

Carbon nanotube-based transducers for immunoassays

“…Figure 5 shows TEM images of MWNT samples from functionalisation strategies using both the HRP and QDOT labels. The size of HRP protein is ~ 5 nm in diameter [21] [22]. An electrode was constructed using 25 l of MWNTs sonicated in water and drop cast on a glassy carbon electrode as a control.…”

Fabrication, characterization and analytical performance of the hydroxylamine sensor based on an oracet blue multi-walled carbon nanotubes film deposited on an electrode surface

“…[13][14][15][16][17] Indeed, these compounds are used in an electrode structure so as to promote the rate of electron transfer reactions. The electrocatalytic activity of important chemical and biochemical species, such as hydrazine, 18 epinephrine, 19 amino acids, 20 oxygen, 21 paracetamol, 22 hemoglobin, 23 acetylsalicylic acid, 24 rutin, 25 cholesterol, 26 NADH and hydrogen peroxide, 27 ascorbic acid, 28 uric acid, 29 nitric oxide, 30 glucose, 31 and hydroxylamine, 10,14 have been investigated at the surface of different electrodes modified with CNTs.…”