THE MECHANISM OF CO OXIDATION OVER CU(110) - EFFECT OF CO GAS ENERGY

被引：50

作者：

DOMAGALA, ME

CAMPBELL, CT

机构：

[1] Department of Chemistry, University of Washington, Seattle, 98195, Washington

来源：

CATALYSIS LETTERS | 1991年 / 9卷 / 1-2期

关键词：

CO OXIDATION ON CU(110); LANGMUIR-HINSHELWOOD MECHANISM;

D O I：

10.1007/BF00769083

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 effect of the temperature of gas phase CO upon the kinetics of the oxygen titration reaction: CO(g) + O(a) --> CO2,g, has been studied. It is found that the reaction's rate is independant of CO gas temperature between 300 and 623 K. The activation energy (6.5 kcal/mole), dependence upon CO pressure (first-order), and independence upon oxygen coverage for 0.1 less-than-or-equal-to theta-O less-than-or-equal-to 0.4 are all independent of the CO gas phase temperature. This result rules out any Eley-Rideal type mechanism whereby CO reacts directly from the gas phase with an oxygen adatom without first being accommodated to the surface temperature in an absorbed state. The result is instead interpretable in terms of a Langmuir-Hinshelwood mechanism.

引用

页码：65 / 70

页数：6

共 20 条

[1] A MOLECULAR-BEAM INVESTIGATION OF THE INTERACTIONS OF CO WITH A PT(111)SURFACE [J].