Coadsorbate induced reconstruction of a stepped Pt(111) surface by sulfur and CO: A novel surface restructuring mechanism observed by scanning tunneling microscopy

被引：50

作者：

Batteas, JD ^{[1
]}

Dunphy, JC ^{[1
]}

Somorjai, GA ^{[1
]}

Salmeron, M ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.77.534

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The chemisorption of sulfur and CO was found to have profound effects on the structure of a stepped platinum surface. By itself, sulfur chemisorbs, forming a p(2 x 2) ordered structure, and induces doubling of the terrace widths and step heights. Subsequent coadsorption of CO displaces the sulfur, compressing it to distances of root 3 times the Pt lattice spacing, and induces surface restructuring; New terraces form which contain exclusively CO and are separated by monatomic steps from the terraces containing the compressed sulfur overlayer. This coadsorbate induced restructuring phenomenon has strong implications in the mechanisms of surface catalyzed reactions.

引用

页码：534 / 537

页数：4

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