Electrochemical properties of aryl-modified gold electrodes

被引：16

作者：

Kullapere, Marko ^{[1
]}

Kozlova, Jekaterina ^{[1
,2
]}

Matisen, Leonard ^{[2
]}

Sammelselg, Vaeino ^{[1
,2
]}

Menezes, Hebert A. ^{[3
]}

Maia, Gilberto ^{[3
]}

Schiffrin, David J. ^{[4
]}

Tammeveski, Kaido ^{[1
]}

机构：

[1] Univ Tartu, Inst Chem, EE-51014 Tartu, Estonia

[2] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

[3] Univ Fed Mato Grosso do Sul, Dept Chem, BR-79070900 Campo Grande, MS, Brazil

[4] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2010年 / 641卷 / 1-2期

关键词：

Electrochemical grafting; Gold electrode; Diazonium salts; Oxygen reduction; Dopamine; Hexacyanoferrate; GLASSY-CARBON ELECTRODE; SELF-ASSEMBLED MONOLAYERS; DIAZONIUM SALTS; COVALENT MODIFICATION; ORGANIC LAYERS; OXYGEN ELECTROREDUCTION; HORSERADISH-PEROXIDASE; ARYLDIAZONIUM SALTS; NICKEL ELECTRODES; TRANSFER KINETICS;

D O I：

10.1016/j.jelechem.2009.12.012

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 Xray 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. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：90 / 98

页数：9

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