石墨
电化学
电极
循环伏安法
材料科学
胶体金
电解质
纳米颗粒
阴极保护
无机化学
化学工程
纳米技术
化学
冶金
物理化学
工程类
作者
Дарья Олеговна Перевезенцева,Eduard Gorchakov
出处
期刊:Advanced Materials Research
日期:2014-09-01
卷期号:1040: 297-302
被引量:2
标识
DOI:10.4028/www.scientific.net/amr.1040.297
摘要
The electrochemical activity of gold nanoparticles at graphite electrodes by the method of cyclic voltammetry is studied. In this article the nature of the supporting electrolyte, modification time of graphite electrode by gold nanoparticles and the potential range on the value of the “inverse” cathodic peak are investigated. The “inverse” cathodic peak of gold nanoparticles formed in the reaction mixture HAuCl 4 :Na 3 C 6 H 5 O 7 :NaBH 4 =1:1:4 is observed on the cathodic branch of cyclic voltamperegram at E c = 0.05 V at graphite electrode. The mechanism of stepwise electrochemical oxidation and reduction of the phase structure of gold on the surface of the graphite electrode in 0.1 M NaOH is offered. The “inverse” cathodic peak of gold nanoparticles on the cathodic branch of cyclic voltammogram at graphite electrode is caused by oxidation of Au 2 O to Au 2 O 3 .<br /><br />
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