Carbon nanotubes paste electrodes

M. D. RUBIANES; G. A. RIVAS

ELSEVIER SCIENCE INC

Lugar: Amsterdam; Año: 2003 vol. 5 p. 689 - 689

font lang="en" size="1" face="AdvPSTim"> The performance ofcarbon nanotubes paste electrodes (CNTPE) prepared by dispersion ofmulti-wall carbon nanotubes (MWNT) within mineral oil is described. The resulting electrode shows an excellent electrocatalytic activity toward ascorbic acid, uric acid, dopamine, 3,4-dihydroxyphenylacetic acid (dopac) and hydrogen peroxide. These properties permit an important decrease in the overvoltage for the oxidation of ascorbic acid (230 mV), uric acid (160 mV) and hydrogen peroxide (300 mV) as well as a dramatic improvement in the reversibility ofthe redox behavior ofdopamine and dopac, in comparison with the classical carbon (graphite) paste electrodes (CPE). The substantial decrease in the overvoltage ofthe hydrogen peroxide reduction (400 mV) associated with a successfu