dc.identifier.uri | http://dx.doi.org/10.15488/1294 | |
dc.identifier.uri | http://www.repo.uni-hannover.de/handle/123456789/1319 | |
dc.contributor.author | Imbihl, R. | |
dc.date.accessioned | 2017-04-06T07:29:16Z | |
dc.date.available | 2017-04-06T07:29:16Z | |
dc.date.issued | 2003 | |
dc.identifier.citation | Imbihl, R.: Fluctuations in catalytic surface reactions. In: New Journal of Physics 5 (2003), 62. DOI: https://doi.org/10.1088/1367-2630/5/1/362 | |
dc.description.abstract | The internal reaction-induced fluctuations which occur in catalytic CO oxidation on a Pt field emitter tip have been studied using field electron microscopy (FEM) as a spatially resolving method. The structurally heterogeneous Pt tip consists of facets of different orientations with nanoscale dimensions. The FEM resolution of roughly 2 nm corresponds to a few hundred reacting adsorbed particles whose variations in the density are imaged as brightness fluctuations. In the bistable range of the reaction one finds fluctuation-induced transitions between the two stable branches of the reaction kinetics. The fluctuations exhibit a behaviour similar to that of an equilibrium phase transition, i.e. the amplitude diverges upon approaching the bifurcation point terminating the bistable range of the reaction. Simulations with a hybrid Monte Carlo/mean-field model reproduce the experimental observations. Fluctuations on different facets are typically uncorrelated but within a single facet a high degree of spatial coherence is found. | eng |
dc.language.iso | eng | |
dc.publisher | Bristol : IOP Publishing Ltd. | |
dc.relation.ispartofseries | New Journal of Physics 5 (2003) | |
dc.rights | CC BY-NC-SA 3.0 Unported | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-sa/3.0/ | |
dc.subject | kinetic phase-transitions | eng |
dc.subject | co oxidation | eng |
dc.subject | field emitter | eng |
dc.subject | heterogeneous catalysis | eng |
dc.subject | crystal planes | eng |
dc.subject | reaction model | eng |
dc.subject | diffusion | eng |
dc.subject | dynamics | eng |
dc.subject | equilibrium | eng |
dc.subject | bistability | eng |
dc.subject.ddc | 530 | Physik | ger |
dc.title | Fluctuations in catalytic surface reactions | |
dc.type | Article | |
dc.type | Text | |
dc.relation.essn | 1367-2630 | |
dc.relation.doi | https://doi.org/10.1088/1367-2630/5/1/362 | |
dc.bibliographicCitation.volume | 5 | |
dc.bibliographicCitation.firstPage | 62 | |
dc.description.version | publishedVersion | |
tib.accessRights | frei zug�nglich |
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