Iodobenzene on Pd(111) studied by thermal desorption spectroscopy and laser-induced thermal desorption-Fourier transform mass spectrometry

被引：22

作者：

Jaramillo, DM ^{[1
]}

Hunka, DE ^{[1
]}

Land, DP ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA

来源：

SURFACE SCIENCE | 2000年 / 445卷 / 01期

基金：

美国国家科学基金会;

关键词：

iodobenzene; laser-induced thermal desorption (LITD); Pd(111); phenyl iodide; thermal desorption spectroscopy;

D O I：

10.1016/S0039-6028(99)01033-X

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：

Iodobenzene decomposes on Pd(lll) and forms benzene, iodine, adsorbed carbon, and hydrogen. At low initial iodobenzene exposures no iodobenzene desorbs, benzene desorbs at 500 K, and hydrogen desorbs between 500 and 700 K, indicative of decomposition of some of the benzene. At high initial exposures iodobenzene desorbs at about 200 K and benzene desorbs at about 160 K; however, no hydrogen desorbs. Iodine desorbs from Pd(lll) around 1000 K. Adsorbed iodine atoms passivate the Pd(lll) surface toward the decomposition of iodobenzene and the dehydrogenation of benzene. Experiments with perdeuterated iodobenzene show that the benzene forms from reaction of phenyl with sub-surface hydrogen by 143 K. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：23 / 31

页数：9

共 27 条

[1] DEHALOGENATION OF FLUOROBENZENE AND CHLOROBENZENE ON PD(111) STUDIED BY ELECTRON-ENERGY LOSS SPECTROSCOPY [J].