High-resolution XPS and NEXAFS study of SO2 adsorption on Pt(111): Two surface SO2 species

被引：64

作者：

Polcik, M

Wilde, L

Haase, J

Brena, B

Comelli, G

Paolucci, G

机构：

[1] SINCROTRONE TRIESTE, I-34012 TRIESTE, ITALY

[2] INST CZECH ACAD SCI, PRAGUE 16253 6, CZECH REPUBLIC

来源：

SURFACE SCIENCE | 1997年 / 381卷 / 01期

关键词：

chemisorption; near-edge X-ray absorption fine structure (NEXAFS); platinum; single crystal surfaces; sulphur dioxide; X-ray photoelectron spectroscopy;

D O I：

10.1016/S0039-6028(97)00060-5

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 and condensation as well as the temperature-dependent decomposition of SO2 on Pt(111) have been studied by high-resolution core-level photoemission and near-edge X-ray absorption fine structure. The data analysis shows that SO2 adsorbs molecularly at 150 K forming a monolayer phase with two SO2 species of different binding energy and quite different molecular orientation. On increasing the temperature to 210 K only SO2 molecules of 0.43 monolayer coverage survive with molecular planes being tilted by alpha = 31 degrees +/- 10 degrees with respect to the surface normal. For condensed SO2 multilayers an SO4 species is formed close to 300 K. (C) 1997 Elsevier Science B.V.

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收藏

页码：L568 / L572

页数：5

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