Electrocatalytic oxidation of chlorophenols by electropolymerised nickel(II) tetrakis benzylmercapto and dodecylmercapto metallophthalocyanines complexes on gold electrodes

被引：41

作者：

Agboola, Bolade ^{[1
]}

Nyokong, Tebello ^{[1
]}

机构：

[1] Rhodes Univ, Dept Chem, ZA-6140 Grahamstown, South Africa

来源：

ELECTROCHIMICA ACTA | 2007年 / 52卷 / 15期

基金：

新加坡国家研究基金会;

关键词：

nickel phthalocyanines complexes; cyclic voltammetry; electropolymerisation; electrochemical impedance spectroscopy; electrocatalysis; chlorophenols oxidation;

D O I：

10.1016/j.electacta.2007.02.017

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This work reports on the use of nickel(II) tetrakis benzylmercapto (NiTBMPc) and dodecylmercapto (NiTDMPc) metallophthalocyanine complexes films on gold electrodes for the electrochemical oxidation of 4-chlorophenol (4-CP) and 2,4,5-trichlorophenol (TCP). Both NiTBMPc and NiTDMPc complexes were successfully deposited on gold electrodes by electropolymerisation. The films were electro-transformed in aqueous 0.1 M NaOH solution to the 'O-Ni-O oxo' bridged form. For both complexes, films with different thickness were prepared and characterised by electrochemical impedance and UV-vis (on indium tin oxide) spectroscopies and the results showed typical behaviour for modified electrodes with increasing charge transfer resistance values (R-p) with polymer thickness. The poly-Ni(OH)NiPes showed better catalytic activity than their poly-NiPcs counterparts. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：5039 / 5045

页数：7

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