Fluctuation-Induced Transitions in a Bistable Surface Reaction: Catalytic CO Oxidation on a Pt Field Emitter Tip

Journal Article · Mon Mar 01 00:00:00 EST 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.82.1907· OSTI ID:321552

Suchorski, Y; Imbihl, R ^[1]; Beben, J ^[2]; James, E W; Evans, J W ^[3]

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1. Institut fuer Physikalische Chemie und Elektrochemie, Universitaet Hannover, Callinstrasse 3-3a, D-30167 Hannover (Germany)
2. Institute of Experimental Physics, University of Wroclaw, Plac Maxa Borna 9, PL-50-204 Wroclaw (Poland)
3. Ames Laboratory and Department of Mathematics, Iowa State University, Ames, Iowa 50011 (United States)

Fluctuations which arise in catalytic CO oxidation on a Pt field emitter tip have been studied with field electron microscopy as the imaging method. Fluctuation-driven transitions between the active and the inactive branch of the reaction are found to occur sufficiently close to the bifurcation point, terminating the bistable range. The experimental results are modeled with Monte Carlo simulations of a lattice-gas reaction model incorporating rapid CO diffusion. {copyright} {ital 1999} {ital The American Physical Society}

• Research Organization: Ames National Laboratory
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 321552
• Journal Information: Physical Review Letters, Vol. 82, Issue 9; Other Information: PBD: Mar 1999
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
CARBON MONOXIDE
CHEMICAL REACTIONS
FLUCTUATIONS
HETEROGENEOUS CATALYSIS
PLATINUM
ION MICROSCOPY
BIFURCATION
SIMULATION
MONTE CARLO METHOD
OXIDATION