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Fast Electron Transfer Kinetics on Multiwalled Carbon Nanotube

Summary: Fast Electron Transfer Kinetics on
Multiwalled Carbon Nanotube
Microbundle Electrodes
J. M. Nugent, K. S. V. Santhanam, A. Rubio,§ and P. M. Ajayan*,
Department of Materials Science & Engineering, Rensselaer Polytechnic Institute,
Troy, New York 12180-3590, Department of Chemistry, Rochester Institute of
Technology, Rochester, New York 14623, and Departamento Fi´sica Teo´rica,
UniVersidad de Valladolid, E-47011 Valladolid, Spain
Received November 8, 2000
The rate of electron transfer at carbon electrodes depends on various factors such as the structure and morphology of the carbon material
used in the electrodes. With the advent of new carbon structures, such as fullerenes and carbon nanotubes, well-defined carbon surfaces
have become available to probe electron-transfer kinetics on these surfaces. We show here that micron-size electrodes made of multiwalled
carbon nanotubes show Nernstien behavior and fast electron-transfer kinetics for electrochemical reactions of Fe(CN)6
3-/4-. This is achieved
without any pretreatments for the electrodes, suggesting the possibility of developing superior carbon electrodes based on carbon nanotubes,
for electrochemical applications.
Since the days of Michael Faraday, different carbon struc-
tures have been studied as electrode material.1 Presently, elec-
trodes made from various carbon materials (partially graphi-


Source: Ajayan, Pulickel M. - Department of Mechanical Engineering and Materials Science, Rice University


Collections: Materials Science