Photodecomposition of 1,1,2-trichloroethane: spectroscopic evidence for vinyl formation on Pt(111)

被引：10

作者：

Hsiao, GS ^{[1
]}

Erley, W ^{[1
]}

Ibach, H ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Grenzflachenforsch & Vakuumphys, D-52425 Julich, Germany

来源：

SURFACE SCIENCE | 1998年 / 396卷 / 1-3期

关键词：

alkenes; chlorocarbon; electron energy loss spectroscopy; low index single crystal surfaces; photochemistry; platinum; surface chemical reaction; thermal desorption spectroscopy;

D O I：

10.1016/S0039-6028(97)00697-3

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：

High-resolution electron energy loss spectroscopy (HREELS) and temperature programmed desorption (TPD) Here applied to the study of 1.1.2-trichloroethane adsorbed on Pt(111) and its reaction products. Adsorption at 85 K occurred molecularly. as verified by HREELS and TDS measurements. Upon heating. the molecule desorbed intact, Irradiation of the sample with a mercury are lamp resulted in cleavage of the carbon-chlorine bonds and the formation of a new surface moiety: vinyl. HREELS measurements of both the deuterated and non-deuterated species confirmed this. Vinyl is stable until 450 K. After flashing to higher temperatures a new surface species was formed: chlorocarbyne. This species was no longer observed by 600 K. Throughout the entire heating procedure there was no evidence for the formation of ethylidyne. (C) 1998 Elsevier Science B.V.

引用

页码：422 / 430

页数：9

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