Article ID Journal Published Year Pages File Type
220082 Journal of Electroanalytical Chemistry 2010 9 Pages PDF
Abstract

The properties of electrochemically grafted gold electrodes surface have been investigated. Electrografting with 1- and 2-naphthyl, biphenyl and 4-bromophenyl groups yielded strongly attached layers and for the latter, electrochemical quartz crystal microbalance (EQCM) and atomic force microscopy (AFM) measurements showed that a multilayer film of bromophenyl groups was formed. This was confirmed by X-ray photoelectron spectroscopy (XPS). The blocking of electron transfer for several redox probes caused by the aryl-modification was investigated using cyclic voltammetry (CV). Oxygen reduction was studied using a rotating disk electrode (RDE) and the data also revealed a strong inhibition of this process by the attached aryl groups. The stability of these functionalised surfaces points to the strength of the Au–C bonds formed.

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Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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