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

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• 作者：Audacity Maringa ; Edith Antunes ; Tebello Nyokong ; ^{t.nyokong@ru.ac.za" class="auth_mail}
• 关键词：gold nanoparticles ; cobalt tetraaminophthalocyanines ; nitrite ; electrocatalysis
• 刊名：Electrochimica Acta
• 出版年：1 March, 2014
• 年：2014
• 卷：121
• 期：Complete
• 页码：93-101
• 全文大小：3325 K

文摘

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 脳 10^鈭? mol cm^鈭? for AuNPs-GCE and 3.0 脳 10^鈭? mol cm^鈭? 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 0.76 V. The catalytic rate constant of 3.96 脳 10⁷ cm³ mol^鈭? s^鈭? was obtained for nitrite oxidation.