Novel Statistical Lattice Model for the Supported Nanoparticle. Features of the Reaction Performance Influenced by the Dynamically Changed Shape and Surface Morphology of the Supported Active Particle Full article
Journal |
PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084 |
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Output data | Year: 2003, Volume: 5, Number: 4, Pages: 784-790 Pages count : 7 DOI: 10.1039/b211949h | ||||||
Tags | RAPID HETEROGENEOUS REACTIONS; DISSOCIATIVE ADSORPTION; ROUGH SURFACES; KINETICS; SIMULATIONS | ||||||
Authors |
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Affiliations |
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Funding (1)
1 | Russian Foundation for Basic Research | 00-03-22004 |
Abstract:
The aim of this study is to reveal the mutual influence of the shape and the surface morphology of supported nanoparticles on the reaction kinetics. The analysis has been provided by means of the novel statistical lattice model, which imitates the physicochemical processes that proceed over the supported particles. To simulate the active metal particle the finite Kossel crystal located on the inert support has been chosen. The surface morphology of the particle is defined by distribution of heights of the metal atom columns. The metal atoms attract the nearest neighbour metal atoms and the atoms of the support. The attraction is characterised by interaction energies between the nearest neighbour metal atoms and between the metal atom and the support underneath. The change of morphology is caused by the thermal diffusion of the surface atoms. As a result the equilibrium shape of the particle has been observed to depend on the temperature and the relative ratio of metal–metal and metal–support energies. The model reaction 2A + B2 → 2AB has been studied, taking into account the roughening of the particle surface and the spillover phenomenon of the adsorbed Aads over the support. It has been shown that the kinetics of the roughened nanometer-sized particle can be notably different from those corresponding to the flat homogeneous surface. The shape of the nanoparticle can change under the influence of the adsorbed layer even in the absence of the adsorbate–metal interactions.
Cite:
Kovalyov E.V.
, Resnyanskii E.D.
, Elokhin V.I.
, Bal'zhinimaev B.S.
, Myshlyavtsev A.V.
Novel Statistical Lattice Model for the Supported Nanoparticle. Features of the Reaction Performance Influenced by the Dynamically Changed Shape and Surface Morphology of the Supported Active Particle
PCCP: Physical Chemistry Chemical Physics. 2003. V.5. N4. P.784-790. DOI: 10.1039/b211949h WOS Scopus РИНЦ
Novel Statistical Lattice Model for the Supported Nanoparticle. Features of the Reaction Performance Influenced by the Dynamically Changed Shape and Surface Morphology of the Supported Active Particle
PCCP: Physical Chemistry Chemical Physics. 2003. V.5. N4. P.784-790. DOI: 10.1039/b211949h WOS Scopus РИНЦ
Dates:
Submitted: | Dec 2, 2002 |
Accepted: | Dec 23, 2002 |
Published online: | Jan 20, 2003 |
Published print: | Jan 29, 2003 |
Identifiers:
Web of science | WOS:000181278300018 |
Scopus | 2-s2.0-0037442295 |
Elibrary | 13441073 |
Chemical Abstracts | 2003:73906 |
Chemical Abstracts (print) | 138:261053 |
OpenAlex | W2066635777 |