Local Forcing of a Nonlinear Surface Reaction: CO Oxidation on Pt(100)

被引：1

作者：

Bilbao, Daniel ^{[1
]}

McMillan, Noah ^{[1
]}

Lauterbach, Jochen ^{[1
]}

Snively, Christopher M. ^{[2
,3
]}

机构：

[1] Univ Delaware, Dept Chem Engn, Ctr Catalyt Sci & Technol, Newark, DE 19716 USA

[2] Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA

[3] Univ Delaware, Dept Mat Sci, Newark, DE 19716 USA

来源：

AICHE JOURNAL | 2009年 / 55卷 / 01期

关键词：

CO oxidation; pattern formation; external forcing; SPATIOTEMPORAL PATTERN-FORMATION; ENERGY ELECTRON-DIFFRACTION; CATALYTIC COOXIDATION; KINETIC OSCILLATIONS; SUBSURFACE OXYGEN; WAVE-PROPAGATION; PHASE-TRANSITION; ADSORPTION; PRESSURES; PLATINUM;

D O I：

10.1002/aic.11655

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A novel spatiotemporal perturbation method for nonlinear surface reactions is reported, thus allowing the creation of new spatially localized structures. Forcing was achieved by dosing reactant gases through a capillary positioned near the catalyst surface, providing control over the local surface coverage and reaction rate. The emergence of localized concentration patterns and oscillations in an otherwise stable System is attributed to a local modification of the catalytic propel-ties of the surface due to external forcing. Based on the spatial orientation, the temporal and thermal stability of the modified surface, as well as the affinity of CO toward the Perturbed surface, subsurface O is proposed as a possible source of the observed localized patterning and surface memory effect. (C) 2008 American Institute of Chemical Engineers AIChE J, 55: 172-179,2009

引用

页码：172 / 179

页数：8