The effects of surface additives on the chemistry of CH3 on Rh(111) as studied by reflection absorption infrared spectroscopy

被引：31

作者：

Kiss, J ^{[1
]}

Kis, A ^{[1
]}

Solymosi, F ^{[1
]}

机构：

[1] Hungarian Acad Sci, React Kinet Res Grp, H-6701 Szeged, Hungary

来源：

SURFACE SCIENCE | 2000年 / 454卷

基金：

匈牙利科学研究基金会;

关键词：

alkali metals; alkynes; chemisorption; rhodium; surface chemical reaction; vibrations of adsorbed molecules;

D O I：

10.1016/S0039-6028(00)00118-7

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 gaseous CH3 on clean and modified Rh(111) has been studied using reflection absorption infrared spectroscopy and thermal desorption spectroscopy. It was found that preadsorbed K adatoms markedly stabilized the CH3 on Rh(lll) and increased its stability by > 10D K. This stabilization effect was attributed to the formation of a surface compound between CH3 and K. In contrast, coadsorbed Zn and I adatoms caused only very slight stabilization of CH3 on Rh due to the site blocking effect. The formation of methoxy species was observed in the CH3 + O coadsorbed layer on Rh(lll). The reaction pathways of surface complexes were also determined. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：273 / 279

页数：7

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