ADSORPTION - DESORPTION-KINETICS ON EPITAXIALLY ORIENTED PALLADIUM CLUSTERS

被引：43

作者：

HENRY, CR

CHAPON, C

DURIEZ, C

机构：

[1] CRMC2-CNRS, Campus Luminy, case 913, Marseille Cedex 9

来源：

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS | 1991年 / 19卷 / 1-4期

关键词：

D O I：

10.1007/BF01448326

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Palladium clusters with a low size dispersion and a single crystallographic shape have been obtained by epitaxial growth on (100) MgO. The isothermal adsorption-desorption kinetics of CO is obtained by a molecular beam method allowing the direct determination of the global adsorption probability and of the mean life time of CO molecules on the clusters. Three main results are deduced from these measurements: - an increase of the adsorption rate of CO on the clusters by the capture of CO molecules physisorbed on the substrate, - a faster desorption rate from (100) than from (111) facets at high coverage, - an increase of the adsorption energy for clusters smaller than 3 nm.

引用

页码：347 / 351

页数：5

共 33 条

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