Oxygen reduction at silver monolayer islands deposited on gold substrate

被引：35

作者：

Kongkanand, A

Kuwabata, S

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Chem Mat, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Grad Sch Engn, Frontier Res Ctr, Suita, Osaka 5650871, Japan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2003年 / 5卷 / 02期

关键词：

oxygen reduction; underpotential deposition; self-assembled monolayer; atomic monolayer; size effect;

D O I：

10.1016/S1388-2481(03)00007-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Underpotential deposition (UPD) of Ag on an Au(111) coated with a self-assembled monolayer (SAM) of decanethiol gives Ag islands having monatomic height. After reductive desorption of the SAM, Ag monolayer islands were exposed and their catalytic activities for oxygen reduction were examined by voltammetry and hanging meniscus rotating disk (HMRD) measurements. Comparison of electrochemical properties and STM images of electrodes revealed that an island with less than 750 Ag-atoms showed two-electron reduction and that an island with over than 4000 Ag-atoms is necessary to show the original ability of four-electron reduction. (C) 2003 Published by Elsevier Science B.V.

引用

页码：133 / 137

页数：5

共 15 条

[1]

ADONUVOR PK, 1988, J ELECTROCHEM SOC, V135, P2509

[2] ELECTROCHEMICAL ACTIVITY OF DISPERSED PLATINUM [J].