THE UNUSUAL ADSORPTION STATES OF PT(111) ELECTRODES STUDIED BY AN IODINE DISPLACEMENT METHOD - COMPARISON WITH AU(111) ELECTRODES

被引：76

作者：

HERRERO, E

FELIU, JM

WIECKOWSKI, A

CLAVILIER, J

机构：

[1] UNIV ILLINOIS,DEPT CHEM,URBANA,IL 61801

[2] CNRS,LEI,F-92195 MEUDON,FRANCE

来源：

SURFACE SCIENCE | 1995年 / 325卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(94)00730-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The process of iodine adsorption on Pt(lll) and Au(lll) electrodes is utilized to identify the nature of unusual adsorption states on the Pt(lll) electrode. The application of iodine allows the adsorbate replacement measurements at higher potentials than it has previously been practised with CO, thus enabling the study of Pt(lll) in perchloric acid medium. The comparison between the results obtained with the two probes leads to self-consistency of the previous and present results. The data obtained with the two electrodes (and in the two supporting electrolytes) are mutually consistent. In sulphuric acid, we confirm that adsorption of an anion (sulfate or bisulfate) accounts for the unique features of the Pt(lll) voltammetry. We also provide experimental results for identifying the origin of the unusual adsorption states in perchloric acid solution.

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页码：131 / 138

页数：8

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