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 inAnalytica chimica acta Vol. 619; no. 1; pp. 49 - 53
Main Authors Lin, Kuan-Wen, Lin, Chang-Hao, Hsieh, You-Zung
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 30.06.2008
Elsevier
Subjects
Analytical chemistry
Carbon nanotubes
Chemistry
Electroanalysis
Electrochemical methods
Exact sciences and technology
Nafion
Tin indium oxide
Carbon nanotubes
Electroanalysis
Nafion
Tin indium oxide
Electrodes
High performance
Electrochemical method
Tin oxide
Carbon nanotubes;Electroanalysis;Nafion;Tin indium oxide
Polymer
Pretreatment
Catecholamine
Coatings
Indium oxide
Carbon oxides
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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.
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ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2008.03.014