Electrooxidation of catecholamines at carbon nanotube-modified indium tin oxide electrodes

In this study, we prepared carbon nanotube (CNT)/Nafion-modified ITO electrodes and investigated their electrochemical behavior. The CNTs were dissolved in a solution of the ionic polymer Nafion and then CNT/Nafion composite films were deposited onto ITO electrodes through spin-coating of this homog...

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Bibliographic Details
Published in:Analytica chimica acta 2008-06, Vol.619 (1), p.49-53
Main Authors: Lin, Kuan-Wen, Lin, Chang-Hao, Hsieh, You-Zung
Format: Article
Language:English
Subjects:
Analytical chemistry
Carbon nanotubes
Chemistry
Electroanalysis
Electrochemical methods
Exact sciences and technology
Nafion
Tin indium oxide
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Summary:In this study, we prepared carbon nanotube (CNT)/Nafion-modified ITO electrodes and investigated their electrochemical behavior. The CNTs were dissolved in a solution of the ionic polymer Nafion and then CNT/Nafion composite films were deposited onto ITO electrodes through spin-coating of this homogeneous solution. We studied the effects of chemical pretreatment of the CNTs and the pH of the buffer on the electroanalytical behavior of the CNT/Nafion-modified ITO electrodes toward catecholamines. The modified electrodes enhanced the peak current and lowered the overpotentials. We observed high electrooxidative performance for the modified ITO electrodes: the oxidative currents of the catecholamines were up to 125-fold higher than those obtained using bare ITO electrodes.
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2008.03.014