Assembly of multilayer films containing iron(III)- substituted Dawson-type heteropolyanions and its electrocatalytic properties: cyclic voltammetry, electrochemical impedance spectroscopy and UV-Vis spectrometry

被引：43

作者：

Zhai, SY ^{[1
]}

Gong, SY ^{[1
]}

Jiang, JU ^{[1
]}

Dong, SJ ^{[1
]}

Li, JH ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Electroanalyt Chem Lab, Changchun 130022, Peoples R China

来源：

ANALYTICA CHIMICA ACTA | 2003年 / 486卷 / 01期

关键词：

iron(III)-substituted heteropolytungstate anions layer-by-layer assembly; electrocatalytic reduction; electrochemical impedance spectroscopy;

D O I：

10.1016/S0003-2670(03)00424-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Ultrathin multilayer films have been prepared by means of alternate adsorption of iron(Ill)-substituted heteropolytungstate anions and a cationic redox polymer on the 4-aminobenzoic acid modified glassy carbon electrode surface based on electrostatic layer-by-layer assembly. Cyclic voltammetry, electrochemical impedance spectroscopy and UV-Vis absorption spectrometry have been used to easily monitor the uniformity of thus-formed multilayer films. Especially, the electrochemical impedance spectroscopy is successfully used to monitor the multilayer deposition processes and is a very useful technique in the characterization of multilayer films because it provides valuable information about the interfacial impedance features. All these results reveal regular film growth with each layer adsorption. The resulting multilayer films can effectively catalyze the reduction of H2O2,NO2- and BrO3-. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：85 / 92

页数：8

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