INFLUENCE OF ADSORBED HYDROXYL AND CARBON-MONOXIDE ON POTENTIAL-INDUCED RECONSTRUCTION OF AU(100) AS EXAMINED BY SCANNING-TUNNELING-MICROSCOPY

被引：25

作者：

EDENS, GJ

GAO, X

WEAVER, MJ

MARKOVIC, NM

ROSS, PN

机构：

[1] PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907

[2] LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

来源：

SURFACE SCIENCE | 1994年 / 302卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0039-6028(94)91088-X

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 potential-dependent hexagonal (''hex'') reconstruction of ordered Au(100) in an alkaline electrolyte, 0.1M KOH, has been examined by means of in-situ scanning tunneling microscopy. In harmony with recent X-ray diffraction results, the hex --> (1 x 1) transition occurs at lower potentials, similar to 0 V versus SCE, than in weakly adsorbing acidic media such as perchloric acid, consistent with an influence of hydroxide adsorption. The dynamics of the reverse (1 x 1) --> hex transition accelerate markedly as the potential is lowered below about - 0.35 V versus SCE. Carbon monoxide adsorption, induced in 0.1M KOH at negative potentials, facilitates the formation of a notably homogeneous hex phase.

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收藏

页码：L275 / L282

页数：8

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