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

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.

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Correspondence to C. G. Vayenas.

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*To whom correspondence should be addressed. E-mail: cat@chemeng.upatras.gr

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Constantinou, I., Bolzonella, I., Pliangos, C. et al. Electrochemical promotion of RuO2 catalysts for the combustion of toluene and ethylene. Catal Lett 100, 125–133 (2005). https://doi.org/10.1007/s10562-004-3440-y

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key words

  • ethylene oxidation
  • toluene oxidation
  • RuO2
  • Yttria-stabilized zirconia
  • electrochemical promotion