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Issue 6, 2005
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Electrochemical reactivity in nanoscale domains: O2 reduction on a fullerene modified gold surface

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Abstract

Fullerene is strongly adsorbed on both single crystal and polycrystalline gold surfaces and its specific adsorption resulted in the formation of high coverage large hexagonal rafts with strong interactions between the adsorbed fullerene molecules and the Au substrate. The oxygen reduction reaction (ORR) was investigated on these surfaces to determine their influence on the reduction mechanism. Oxygen reduction did not take place on the fullerene overlayer but proceeded on the sub-nanometer sized exposed pockets of the underlying Au substrate. Reduction at these confined sites produces hydrogen peroxide selectively. This effect is ascribed to the blocking action, or so-called “third body effect”, of the adsorbed fullerene molecules, which do not display electrocatalytic properties for oxygen reduction.

Graphical abstract: Electrochemical reactivity in nanoscale domains: O2 reduction on a fullerene modified gold surface

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Article information


Submitted
26 Nov 2004
Accepted
25 Jan 2005
First published
07 Feb 2005

Phys. Chem. Chem. Phys., 2005,7, 1293-1299
Article type
Paper

Electrochemical reactivity in nanoscale domains: O2 reduction on a fullerene modified gold surface

A. Kuzume, E. Herrero, J. M. Feliu, E. Ahlberg, R. J. Nichols and D. J. Schiffrin, Phys. Chem. Chem. Phys., 2005, 7, 1293 DOI: 10.1039/B417928P

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