Catalysis Letters

, Volume 100, Issue 3–4, pp 125–133 | Cite as

Electrochemical promotion of RuO2 catalysts for the combustion of toluene and ethylene

  • I. Constantinou
  • I. Bolzonella
  • C. Pliangos
  • Ch. Comninellis
  • C. G. Vayenas
Article

The electrochemical promotion of the complete catalytic oxidation of ethylene and toluene on RuO2Catalyst films deposited on Y2O3-stabilized-ZrO2 (YSZ) has been investigated at temperatures 400 to 500°C. Anodic polarization (1.5 V), i.e. O2− supply from the YSZ support to the catalyst, is found to enhance the rates of ethylene and toluene oxidation by a factor of 10 and 8 respectively. Cathodic polarization (−1.5 V) i.e. oxygen removal from the catalyst, enhances the oxidation rates by a factor of 3 and 4, respectively. These rate enhancements are strongly nonFaradaic. The kinetics, positive order in both reactants, and the promotional results, inverted-volcano type for both reactions, conform to the recently found rules of electrochemical promotion.

key words

ethylene oxidation toluene oxidation RuO2 Yttria-stabilized zirconia electrochemical promotion 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • I. Constantinou
    • 1
  • I. Bolzonella
    • 2
  • C. Pliangos
    • 1
  • Ch. Comninellis
    • 2
  • C. G. Vayenas
    • 1
  1. 1.Department of Chemical EngineeringUniversity of PatrasPatrasGreece
  2. 2.Institute of Chemical EngineeringSwiss Federal Institute of TechnologyLausanneSwitzerland

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