ELECTRONIC-PROPERTIES OF PT IN BIMETALLIC SYSTEMS - PHOTOEMISSION AND MOLECULAR-ORBITAL STUDIES FOR PT-AL SURFACE ALLOYS

被引：25

作者：

RODRIGUEZ, JA

KUHN, M

机构：

[1] Department of Chemistry, Brookhaven National Laboratory, Upton

来源：

CHEMICAL PHYSICS LETTERS | 1995年 / 240卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(95)00550-N

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 adsorption of Pt on polycrystalline Al leads to the formation of surface alloys. The electronic properties of these systems have been examined using XPS and ab initio SCF calculations. The Pt-Al surface alloys display a Pt(5d) band that appears at much higher binding energy (approximate to 1.8 eV) than in metallic Pt. This is accompanied by positive shifts in the Pt 4f (approximate to 1.2 eV) and Al 2s (approximate to 0.2 eV) levels. The Pt-Al bond is complex, involving an Al(3s, 3p) --> Pt(6s, 6p) charge transfer and a Pt(5d) --> Pt(6s, 6p) rehybridization that localize electrons in the region between the two metal centers.

引用

页码：435 / 441

页数：7

共 37 条

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