Adsorption of cyclic hydrocarbons on Pt and the interaction of the adsorbed species with hydrogen

被引：4

作者：

Hlavathy, Z ^{[1
]}

Tétényi, P ^{[1
]}

机构：

[1] Hungarian Acad Sci, CRC, Inst Isotopes, Dept Catalysis & Tracer Studies, H-1525 Budapest, Hungary

来源：

APPLIED SURFACE SCIENCE | 2005年 / 252卷 / 02期

关键词：

aromatic rings; pi-complex; work function change; AES;

D O I：

10.1016/j.apsusc.2005.01.017

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 six-membered hydrocarbon cycles and cyclopentane and the interaction of hydrogen with the adsorbed layer on polycrystalline Pt-foil have been studied. The work function change (Delta phi) was followed by a Kelvin probe and the C/Pt peak ratio was determined by Auger electron spectroscopy. Combining these two techniques made it possible to distinguish between chemisorption via sigma-bonds and pi-complex formation. Benzene and toluene adsorbed first as pi-complex while cyclohexane showed initially a partial aromatization and a pi-complex-like bonding to the surface. Excess hydrocarbon or addition of hydrogen transformed the pi-complex into Q-bonded species. Cyclopentane adsorbed via Q-bonds and showed no significant hydrogen effect. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：412 / 419

页数：8

共 33 条

[31] Unusual hydrogen effect in olefin dehydrogenation: 1-methylcyclohexene dehydrogenation initiated by excess hydrogen over Pt(111) surfaces, a combined sum frequency generation spectroscopy and kinetic study [J].