MODIFICATION OF THE SURFACE REACTIVITY OF MO(110) UPON CARBIDE FORMATION

被引：53

作者：

FRUHBERGER, B ^{[1
]}

CHEN, JG ^{[1
]}

机构：

[1] EXXON RES & ENGN CO,CORP RES LABS,ANNANDALE,NJ 08801

来源：

SURFACE SCIENCE | 1995年 / 342卷 / 1-3期

关键词：

ALKENES; AUGER ELECTRON SPECTROSCOPY; CARBIDES; CARBON MONOXIDE; CHEMISORPTION; ELECTRON ENERGY LOSS SPECTROSCOPY; LOW INDEX SINGLE CRYSTAL SURFACES; MOLYBDENUM; THERMAL DESORPTION SPECTROSCOPY;

D O I：

10.1016/0039-6028(95)00837-3

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：

The surface reactivity of thin molybdenum carbide films, prepared on a Mo(110) surface, has been investigated by using CO and ethylene molecules as chemical probes. Analytical techniques used include high-resolution electron energy loss spectroscopy (HREELS), Auger electron spectroscopy (AES), temperature-programmed desorption (TPD), low energy electron diffraction (LEED) and X-ray photoelectron spectroscopy (XPS). The carbide layers remain active towards the decomposition of CO and ethylene. Comparison with the clean Mo(110) surface as well as with the oxygen-modified Mo(110) surface indicates significant differences in surface reactivity of the molybdenum carbide films. These differences lend support to the assumption of an electronic modification upon surface carbide formation, rather than pure site-blocking by carbon atoms.

引用

页码：38 / 46

页数：9

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