Electrochemical quartz crystal microbalance study of copper adatoms on Au(111) electrodes in solutions of perchloric and sulfuric acid

被引：67

作者：

Uchida, H ^{[1
]}

Hiei, M ^{[1
]}

Watanabe, M ^{[1
]}

机构：

[1] Yamanashi Univ, Fac Engn, Lab Electrochem Energy Convers, Kofu, Yamanashi 400, Japan

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 452卷 / 01期

关键词：

copper adatoms; Au(III); electrodes; adsorption; perchloric acid; sulfuric acid; electrochemical quartz crystal microbalance;

D O I：

10.1016/S0022-0728(98)00112-0

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The adsorption of anions on highly ordered (111)-type gold electrodes with and without Cu adatoms in perchloric and sulfuric acid electrolyte solutions was investigated on an electrochemical quartz crystal microbalance. A distinct increase in mass due to the specific adsorption of hydrated bisulfate and perchlorate anions was observed in Cu2+ -free solutions and their amounts were determined as a function of the potential. The composition of the Cu-adlayer (theta(Cu) and theta(anion), coverages of Cu adatoms and co-adsorbed anions) during formation or removal in the potential sweep was also determined in both electrolyte solutions. A pair of reversible anodic and cathodic peaks in the voltammogram for the first Cu-upd region in H2SO4 was found to correspond well to the reversible changes in theta(Cu) and theta(anion). In contrast, asymmetric features of the voltammograms for the second Cu-upd region in H2SO4 and for whole processes in HClO4 corresponded to the large hysteresis in changes of theta(Cu) and theta(anion), probably originating from a slow rearrangement of both species. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：97 / 106

页数：10

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