Molecular beam study of CO and O-2 sticking coefficients on Rh model catalysts

被引：16

作者：

Nehasil, V

Stara, I

Matolin, V

机构：

[1] Dept. Electronics and Vacuum Phys., Faculty of Mathematics and Physics, Charles University, V Holesovckach 2

来源：

SURFACE SCIENCE | 1997年 / 377卷 / 1-3期

关键词：

carbon monoxide; oxygen; rhodium; sticking coefficient; surface diffusion;

D O I：

10.1016/S0039-6028(96)01510-5

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 CO and O-2 on Rh foil and Rh small particles supported by an Al2O3 polycrystalline substrate were investigated by means of a molecular beam technique. The supported Rh particles of different sizes were prepared by evaporation using the principle of electron bombardment. The Rh foil used was plane annealed and Ar+ ion bombarded. The effect of Rh surface morphology on the results is discussed. All the sticking coefficients obtained on small particles show that the part of adsorbed molecules the Rh particles by diffusion across the Al2O3 substrate. The diameters of the diffusion zones are calculated.

引用

页码：813 / 818

页数：6

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