A UNIMOLECULAR REACTION MODEL APPROACH TO THE STUDY OF DESORPTION OF CARBON-MONOXIDE INDUCED BY CHEMICAL ACTIVATION

被引：5

作者：

KANG, H

PARK, KH

SALK, SHS

LEE, CW

机构：

[1] POHANG INST SCI & TECHNOL,DEPT PHYS,POHANG 790600,SOUTH KOREA

[2] KYUNGBUK NATL UNIV,COLL NAT SCI,DEPT CHEM,TAEGU 702701,SOUTH KOREA

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 193卷 / 1-3期

关键词：

D O I：

10.1016/0009-2614(92)85691-3

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：

A simple model based on the unimolecular reaction (RRKM) theory is described and used to calculate the desorption rate constant of carbon monoxide induced by the exoergic reaction between a gaseous oxygen atom and a surface carbon atom on nickel and platinum surfaces. We find that only a small number of neighbouring surface atoms may participate in the activated complex and are mainly responsible for energy quenching in chemically induced desorption. It is predicted that the desorption rate constant k(d) decreases with increasing number of the neighbouring surface atoms n, exhibiting an approximately linear relationship between log k(d) and n.

引用

页码：104 / 108

页数：5

共 19 条

[1] VIBRATIONAL EXCITATIONS AND STRUCTURE OF CO ADSORBED ON NI(100) [J].