Suppression of formation of ethylidyne on Pt(111) by reversibly adsorbed di-σ-bonded ethylene studied by in situ IRAS

被引：16

作者：

Ohtani, T ^{[1
]}

Kubota, J ^{[1
]}

Kondo, JN ^{[1
]}

Hirose, C ^{[1
]}

Domen, K ^{[1
]}

机构：

[1] Tokyo Inst Technol, Resources Utilizat Res Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

SURFACE SCIENCE | 1998年 / 415卷 / 1-2期

关键词：

ethylene; ethylidyne; IRAS; Pt(111);

D O I：

10.1016/S0039-6028(98)00559-7

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 suppression of ethylidyne formation on Pt(Ill) by reversible adsorption of di-a-bonded ethylene in the presence of 1.3 x 10(2) Pa of ethylene was observed using infrared reflection absorption spectroscopy (IRAS). Di-B-bonded ethylene was converted to ethylidyne at 260-300 K in 1.3 x 10(2) Pa of ethylene, while it was converted at 240-260 K in vacuum. The vacant sites adjacent to di-sigma-bonded ethylene are regarded as being necessary for ethylidyne formation, which were occupied by di-sigma-bonded ethylene equilibrated with gaseous ethylene. The reversible adsorption of di-sigma-bonded ethylene was notified by an IRAS peak at 2906 cm(-1) even at 300 K, which was confirmed by the substitution of isotopically labeled ethylene at 200 K. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：L983 / L987

页数：5

共 24 条

[1] BONDING AND CHEMISTRY OF HYDROCARBON MONOLAYERS ON METAL-SURFACES [J].