Structure and reactivity of VOx/Rh(111) model catalysts

被引：13

作者：

Hartmann, T

Knozinger, H

机构：

来源：

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS | 1996年 / 197卷

关键词：

model catalyst; CO dissociation; Vanadium oxide on Rh(111); promoter effect; XPS; X-ray photoelectron forward scattering;

D O I：

10.1524/zpch.1996.197.Part_1_2.113

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：

Vanadium oxide promoted Rh catalysts were modelled by deposition of small VOx clusters or islands on a Rh(111) single crystal surface. These model catalysts were structurally characterized by X-ray photoelectron forward scattering (XPD), and He+ low energy ion scattering spectroscopy (LEIS). XPS evidence is presented for the creation of new sites which are located along the perimeters of the VOx islands. These sites induce dissociative chemisorption of carbon monoxide at room temperature, a process which does not occur at this low temperature on the clean Rh(111) surface.

引用

页码：113 / 124

页数：12

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