Electrochemical behaviour of gold nanoparticles and Co tetraaminophthalocyanine on glassy carbon electrode

被引：42
|
作者：
Maringa, Audacity [1 ]
Antunes, Edith [1 ]
Nyokong, Tebello [1 ]
机构：
[1] Rhodes Univ, Dept Chem, ZA-6140 Grahamstown, South Africa
来源：
ELECTROCHIMICA ACTA | 2014年 / 121卷
基金：
新加坡国家研究基金会;
关键词：
gold nanoparticles; cobalt tetraaminophthalocyanines; nitrite; electrocatalysis; CYCLIC VOLTAMMETRY; FILMS; OXIDE; PHTHALOCYANINES; SURFACE; ELECTROOXIDATION; IMMOBILIZATION; HYDRAZINE; BIOSENSOR; OXIDATION;
D O I：
10.1016/j.electacta.2013.12.132
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We report on the electrodeposition of gold nanoparticles (AuNPs) onto the glassy carbon electrode (GCE) followed by polymerization of cobalt tetraamino phthalocyanine (CoPc(NH2)(4)) on top (represented as poly-CoPc(NH2)(4)-/AuNPs-GCE). The modified electrode where CoPc(NH2)(4) is polymerized first followed by deposition of AuNPs is represented as AuNPs/poly-CoPc(NH2)(4)-GCE. In the absence of AuNPs, the electrode is represented as poly-CoPc(NH2)(4)-GCE or for AuNPs alone (AuNPs-GCE). The surface coverage was 1.5 x 10(-9) mol cm(-2) for AuNPs-GCE and 3.0 x 10(-9) mol cm(-2) for the rest of the modified electrodes. AuNPs/CoPc(NH2)(4)-GCE exhibited high electrocatalytic activity towards the oxidation of nitrite, with detection potential of 0.76V. The catalytic rate constant of 3.96 x 10(7) cm(3) mol(-1) s(-1) was obtained for nitrite oxidation. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：93 / 101
页数：9
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