DEHYDROGENATION OF CYCLOHEXENE, 1,3-CYCLOHEXADIENE AND 1,4-CYCLOHEXADIENE TO BENZENE ON SI(111)7 X 7

被引：25

作者：

HU, DQ ^{[1
]}

MACPHERSON, CD ^{[1
]}

LEUNG, KT ^{[1
]}

机构：

[1] UNIV WATERLOO,DEPT CHEM,WATERLOO N2L 3G1,ONTARIO,CANADA

来源：

SURFACE SCIENCE | 1992年 / 273卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0039-6028(92)90272-8

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 a series of six-membered cyclic hydrocarbons including benzene, 1,3- and 1,4-cyclohexadiene and cyclohexene on clean and modified Si(111)7 x 7 surfaces has been studied using thermal desorption spectrometry. Room-temperature adsorption of these molecules on clean and sputtered Si(111)7 x 7 surfaces was found. In particular, two molecular desorption states (at 350 and at 430 K) were observed for benzene. Evidence of benzene formation by a dehydrogenation surface reaction, with at least three benzene evolution states (at approximately 350 K, between 400 and 500 K and at approximately 550 K), was found for the thermal desorption of cyclohexene, 1,3- and 1,4-cyclohexadiene. The room-temperature adsorption of these olefins appeared to be a crucial precursor step for the dehydrogenation surface reaction. Possible bonding geometries for these adsorption states were proposed. As well, the extent of the surface catalytic reforming property of Si(111)7 x 7 and amorphous Si was investigated.

引用

页码：21 / 30

页数：10

共 23 条

[1]

[Anonymous], 1962, VACUUM

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