Ionics

, Volume 4, Issue 3–4, pp 207–214 | Cite as

Electrochemical promotion of electronically isolated and dispersed Pt catalysts

  • M. Marwood
  • S. Balomenou
  • A. Tsiliras
  • C. A. Cavalca
  • C. Pliangos
  • C. G. Vayenas
Article

Abstract

In this paper we discuss the first attempts to induce the effect of Electrochemical Promotion or Non-Faradaic Electrochemical Modification of Catalytic Activity (NEMCA) on highly dispersed catalyst-electrodes systems which can compete in terms of dispersion and surface area with industrial catalysts. Three systems are discussed:
  1. 1.

    Electrochemical promotion of C2H4 oxidation on electronically isolated Pt catalysts on Y2O3-stabilized-Zirconia (YSZ) where NEMCA is induced via potential application between two terminal Au electrodes also supported on the solid electrolyte (bipolar design).

     
  2. 2.

    Electrochemical promotion of C2H4 oxidation on a finely dispersed Pt catalyst deposited on a Au electrode which is supported on YSZ.

     
  3. 3.

    Induction of NEMCA during CH3OH oxidation on Pt without external voltage application by utilizing the potential difference developed between the catalyst and a catalytically inert counter electrode.

     

In all cases significant non faradaic behavior has been obtained. The underlying catalytic/ electro-catalytic phenomena are discussed together with some of the engineering challenges for potential practical applications.

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Copyright information

© IfI - Institute for Ionics 1998

Authors and Affiliations

  • M. Marwood
    • 1
  • S. Balomenou
    • 1
  • A. Tsiliras
    • 1
  • C. A. Cavalca
    • 1
  • C. Pliangos
    • 1
  • C. G. Vayenas
    • 1
  1. 1.Department of Chemical EngineeringUniversity of PatrasPatrasGreece

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