KINETICS OF ELECTROCHEMICAL REACTIONS ON MODEL SUPPORTED CATALYSTS: READSORPTION AND MASS TRANSPORT

Vladimir P. Zhdanov () and Bengt Kasemo
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Vladimir P. Zhdanov: Competence Center for Catalysis, Chalmers University of Technology, S-412 96 Göteborg, Sweden;
Bengt Kasemo: Competence Center for Catalysis, Chalmers University of Technology, S-412 96 Göteborg, Sweden

Surface Review and Letters (SRL), 2008, vol. 15, issue 06, 745-751

Abstract: To bridge the structure gap, electrochemical reactions can be studied in flow cells with nm-sized catalyst particles deposited or fabricated on the cell walls. The understanding of the role of mass transport in such cells is now limited. To clarify the likely effects in this field, we analyze the simplest reaction scheme including intermediate desorption, readsorption, and subsequent reaction and show how the net rate of the formation of intermediate can be influenced by its diffusion in the liquid phase. With certain approximations, we derive analytical results describing reaction and diffusion near catalyst particles and in more remote regions in the simplest 1D case and more complex 2D and 3D situations.

Keywords: Electrochemical reactions; nm-sized supported catalyst particles; intermediate desorption and readsorption; mass transport; laminar-flow conditions; reaction–diffusion equations; diffusion length; 82.65.+r; 82.45.Jn; 81.07.-b; 68.43.Mn (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1142/S0218625X08011962

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