High Order Cyclic Voltammograms During Electrooxidation of Ethanol Catalyzed by Gold

被引：4

作者：

da Silva, Kaline N. ^{[1
]}

Maruyama, Suelen T. ^{[1
]}

Sitta, Elton ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2017年 / 28卷 / 09期

基金：

巴西圣保罗研究基金会;

关键词：

high order voltammograms; ethanol electrooxidation; gold catalyst; cation effects; SINGLE-CRYSTAL ELECTRODES; ALKALINE MEDIA; NONCOVALENT INTERACTIONS; VOLTAMMETRIC RESPONSES; CHEMICAL INSTABILITIES; NOBLE-METALS; OXIDATION; PLATINUM; MECHANISM; CATIONS;

D O I：

10.21577/0103-5053.20170020

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Under fixed limits, potential sweeps in some electrochemical systems depict current profile whose shape repeats in every n cycle (with n > 1), receiving the name of high order voltammograms (HOV). HOV have been observed during electrooxidation of organic molecules catalyzed mainly by Pt. The present study shows HOV behavior during ethanol electrooxidation reaction onto gold in alkaline media. Firstly, a strong dependence of HOV with minimum potential is remarkable in this system and has not been considered in previous numeric models. Moreover, due to high sensibility of HOV to surface conditions, it was possible to follow effects caused by cation interactions with adsorbed oxygenated species.

引用

页码：1725 / 1731

页数：7

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