Role of Energy Dissipation and Surface Mobility in Heterogeneous Catalysis by Metals

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Title:Role of Energy Dissipation and Surface Mobility in Heterogeneous Catalysis by Metals
Creators:
Knor, Zlatko
Plšek, Jan
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 63, 11, pp. 1851-1868
Uncontrolled Keywords:Trapping sites, Catalysis by metals, Energy dissipation, Heterogeneous catalysis, Field emission microscopies, Reaction zone, Surface mobility

Abstract

The fundamental role of excess energy dissipation and of surface species mobility, both in the preparation of model metallic catalysts (bimetallic catalysts, bimetallic oxide-supported catalysts), and in the activation of reactant molecules on the catalyst surfaces (single crystals, bimetallic and bimetallic oxide-supported catalysts) are discussed. A generalized model of surface interactions is proposed which satisfactorily explains the trapping of particles from the gas phase at the atomic steps and recovery of the trapping sites due to migration of the trapped species towards flat terraces. Higher probability of encounter of these species with other reactants on flat terraces and easier desorption of the reaction products from there in comparison with the bound state at the edges of atomic steps can be expected. Results of FIM and FEM studies of Pt, Dy-W, Pd-W and Pd-Mo systems are used to illustrate selected features of the proposed general model. <p>

Title:Role of Energy Dissipation and Surface Mobility in Heterogeneous Catalysis by Metals
Creators:
Knor, Zlatko
Plšek, Jan
Uncontrolled Keywords:Trapping sites, Catalysis by metals, Energy dissipation, Heterogeneous catalysis, Field emission microscopies, Reaction zone, Surface mobility
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:63
Number:11
Page Range:pp. 1851-1868
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19981851UNSPECIFIED
ID Code:1425
Item Type:Article
Deposited On:06 Feb 2009 17:09
Last Modified:06 Feb 2009 16:09

Citation

Knor, Zlatko; Plšek, Jan (1998) Role of Energy Dissipation and Surface Mobility in Heterogeneous Catalysis by Metals. Collection of Czechoslovak Chemical Communications, 63 (11). pp. 1851-1868. ISSN 0010-0765

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