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Reaction Kinetic-Induced Changes in the Electrochemically Promoted C2H4 Oxidation on Pt/YSZ

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The electrochemical promotion of C2H4 oxidation reaction has been investigated under various feed gas compositions and temperatures over a Pt/Y2O3-stabilized ZrO2 catalyst electrode. It was found that under oxidizing conditions the reaction exhibits electrophobic behavior, i.e. the catalytic rate of CO2 formation increases with anodic potential application, while it shifts to electrophilic behaviour, i.e. the rate increases with cathodic potential application, under near stoichiometric feed conditions. At intermediate C2H4 to O2 ratios and low temperatures volcano type behavior is observed, i.e. the rate is poisoned both with anodic and cathodic potential application. The effect of feed gas composition on the electrochemical promotion behaviour is related to changes in the reaction kinetic order with respect to C2H4 and O2. The results are in excellent agreement with the rules of electrochemical and chemical promotion.

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Saranya Peng-ont, Suttichai Assabumrungrat, and Piyasan Praserthdam would like to thank the financial supports from the Royal Golden Jubilee PhD program under the Thailand Research Fund and Chulalongkorn University, and the TRF senior researcher scholar under the Thailand Research Fund. Susanne Brosda and Constantinos G. Vayenas gratefully thank the “Synergasia” and “Aristeia” programs of the Greek Secretary of Research and Technology (GSRT) for partial financial support.

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Correspondence to S. Brosda.

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Peng-ont, S., Souentie, S., Assabumrungrat, S. et al. Reaction Kinetic-Induced Changes in the Electrochemically Promoted C2H4 Oxidation on Pt/YSZ. Catal Lett 143, 445–453 (2013).

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  • Promotion
  • Electrochemical promotion
  • Catalytic kinetics
  • Promotional rules
  • Catalytic reaction classification
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