Self-accelerating kinetics of CO2 formation on Ir(110)

被引：16

作者：

Burghaus, U ^{[1
]}

Ding, JQ ^{[1
]}

Weinberg, WH ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

来源：

SURFACE SCIENCE | 1998年 / 396卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

carbon monoxide; catalysis; iridium; Ir(111); molecular beams; oxygen; self-accelerating CO2 formation;

D O I：

10.1016/S0039-6028(97)00676-6

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：

We report measurements of CO oxidation by CO molecular beam titration measurements on an Ir(110) surface precovered with atomically bonded oxygen. During the course of the titration, both the reaction product CO2 and the backscattered CO intensity were detected. The oxygen precoverage, the kinetic energy of the molecular CO and the surface temperature were varied. The CO2 formation rate increases with increasing CO exposure time and depends strongly on surface temperature. The self-accelerating CO2 formation kinetics are semi-quantitatively discussed using computer simulations with rate equations of the Langmuir-Hinshelwood type with coverage-dependent reaction rate coefficients and adsorption probabilities. (C) 1998 Elsevier Science B.V.

引用

页码：273 / 283

页数：11

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