Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 8, Issue 9, Pages 1475-1480Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2006.07.002
Keywords
oxygen reduction; electrocatalysis; gold nanoparticles; multi-walled carbon nanotubes; transmission electron microscopy
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The electrochemical reduction of oxygen has been studied on gold nanoparticle/multi-walled carbon nanotubes (GNP/MWCNT) modified glassy carbon (GC) electrodes in 0.5 M H2SO4 solution using the rotating disk electrode (RDE) technique. The oxygen reduction behaviour of GNP/MWCNT electrodes was compared with that of a bulk gold electrode. Electrochemical studies indicate that the GNP/MWCNT catalyst shows a remarkable electrocatalytic activity towards O-2 reduction in acid media. The RDE results reveal that the reduction of oxygen proceeds by a two-electron pathway at low overpotentials. (c) 2006 Elsevier B.V. All rights reserved.
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