Electrocatalytic Oxidation and the Mechanism of Dopamine
on a MWNT-Modified Glassy Carbon Electrode¹

Dao-Jun Guo^z and Ming Jin

School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China

School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, PR China

Received September 28, 2011

Abstract—The electrochemical behavior of dopamine (DA) at a MWNTs-modified glassy carbon electrode
was investigated by cyclic voltammetry (CV), square wave voltammetry (SWV). The MWNTs modified elec-
trode exhibited marked promotion of the electrochemical reaction of DA in different environments. Under opti-
mum conditions, the peak currents of SWV of DA were increased linearly with incremental concentration of
DA in the range from 5 10^–7 to 1 10^–5 mol L^–1. The limit of detection is 3 10^–7 mol L^–1.

Keywords: carbon nanotubes, modified electrode, dopamine

DOI: 10.1134/S1023193513020080

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