Adsorption of benzene on ordered Sn/Pt(111) surface alloys

被引：29

作者：

Breitbach, J ^{[1
]}

Franke, D ^{[1
]}

Hamm, G ^{[1
]}

Becker, C ^{[1
]}

Wandelt, K ^{[1
]}

机构：

[1] Univ Bonn, Inst Phys Chem, D-53115 Bonn, Germany

来源：

SURFACE SCIENCE | 2002年 / 507卷

关键词：

platinum; tin; aromatics; electron energy loss spectroscopy (EELS); photoelectron spectroscopy; thermal desorption;

D O I：

10.1016/S0039-6028(02)01168-8

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 benzene (C6H6) on Pt(1 1 1) and two Sn/Pt(1 1 1) surface alloys has been investigated using high resolution electron energy loss spectroscopy, ultraviolet photoelectron spectroscopy and temperature programmed desorption. The two ordered Sn/Pt(1 1 1) alloys were prepared by annealing a thin Sri film deposited onto Pt(1 1 1). Depending on the temperature of annealing the surface exhibited a (2 x 2) or (root3 x root3)R30degrees LEED pattern corresponding to a surface composition of Pt3Sn and Pt2Sn, respectively. At temperatures below 350 K benzene adsorbs intact on the pure Pt(1 1 1) surface. The molecule is pi-bonded with its ring parallel to the substrate. Upon heating part of the benzene desorbs and the remaining amount dehydrogenates to carbon. On both Sn/Pt(1 1 1) alloys benzene is physisorbed and the decomposition is completely suppressed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：18 / 22

页数：5

共 11 条

[1] ADSORPTION STATES OF BENZENE AND TOLUENE ON PT(111) - A VIBRATIONAL EELS, DELTA-PHI, AES AND TDS STUDY [J].