SOME UNIQUE ASPECTS OF ELECTROCHEMICAL PROCESSES AT THE GROUP IB METAL AQUEOUS-SOLUTION INTERFACE

被引:18
作者
BURKE, LD
LEE, BH
RYAN, TG
机构
[1] Department of Chemistry, University College, Cork
关键词
Chemical Reactions--Redox - Electrochemistry--Interfaces - Electrodes; Electrochemical - Solutions--Chemical Reactions;
D O I
10.1149/1.2086953
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
It has been known for some time that the group lb metals, copper, silver, and gold, are unique with regard to the magnitude of the surface-enhanced Raman spectroscopy response recorded, especially for organic bases, at the metal/solution interface. Another unique feature of these three metal electrode systems is described here; they display an adatom (M*)/hydrous oxide transition in which the cation is in the univalent (M+) state. It is suggested that these are the only metals known to date that readily yield relatively insoluble, surface-bound, univalent hydrous oxide species that behave as strong bases. The redox transition in question, M*/M(1) hydrous oxide, displays an unusual shift in potential upon altering the solution pH; this shift (previously reported for gold and silver) was monitored in the present work by recording the change in onset (anodic sweep)/termination (cathodic sweep) potential for dimethylamine borane oxidation, a reaction induced by the oxidized form of the couple acting as a mediator. It was pointed out that the two unique features of these three metals have the same basis, i.e., an array of univalent cations attached to the electrode surface. © 1990, The Electrochemical Society, Inc. All rights reserved.
引用
收藏
页码:2417 / 2422
页数:6
相关论文
共 25 条