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- Title
Reaction Kinetic-Induced Changes in the Electrochemically Promoted CH Oxidation on Pt/YSZ.
- Authors
Peng-ont, S.; Souentie, S.; Assabumrungrat, S.; Praserthdam, P.; Brosda, S.; Vayenas, C.
- Abstract
The electrochemical promotion of CH oxidation reaction has been investigated under various feed gas compositions and temperatures over a Pt/YO-stabilized ZrO catalyst electrode. It was found that under oxidizing conditions the reaction exhibits electrophobic behavior, i.e. the catalytic rate of CO 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 CH to O 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 CH and O. The results are in excellent agreement with the rules of electrochemical and chemical promotion. Graphical Abstract: [Figure not available: see fulltext.]
- Subjects
OXIDATION-reduction reaction; CATALYSTS; ELECTROPHILIC substitution reactions; ELECTRODES; OXIDATION of ethylene; ZIRCONIUM oxide; LOW temperatures
- Publication
Catalysis Letters, 2013, Vol 143, Issue 5, p445
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-013-0982-x