Fluctuations and patterns in nanoscale surface reaction systems: Influence of reactant phase separation during CO oxidation

TitleFluctuations and patterns in nanoscale surface reaction systems: Influence of reactant phase separation during CO oxidation
Publication TypeJournal Article
Year of Publication2007
AuthorsLiu DJ, Evans JW
Journal TitlePhysical Review B
Volume75
Pages073401
Date PublishedFeb
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000244533400017
Keywordsbehavior, FIELD ELECTRON, microscopy, model
Abstract

A realistic atomistic model is used to assess spatiotemporal behavior in nanoscale CO oxidation systems at higher pressures than for traditional ultrahigh vacuum studies. The strong influence of adspecies interactions in this regime of high reactant coverages leads to phase separation between oxygen-rich and CO-rich reactive states. Time-series studies reveal fluctuation-induced transitions between these states, as well as transitions between reactive and inactive states. In addition, we observe flickering spatial patterns with sharp boundaries.

DOI10.1103/PhysRevB.75.073401
Alternate JournalPhys. Rev. B