The effect of electrochemical oxygen pumping on the steady-state and oscillatory behavior of CO oxidation on polycrystalline Pt
- Γεντεκακης Ιωαννης(http://users.isc.tuc.gr/~igentekakis)
- Gentekakis Ioannis(http://users.isc.tuc.gr/~igentekakis)
- Vayenas, Costas G(http://viaf.org/viaf/233557002)
DOIAbstract
Summarization: The effect of electrochemically pumping O2− to or from a porous polycrystalline Pt catalyst film used for CO oxidation at atmospheric pressure and temperatures 250–600 °C was studied. The Pt film served both as a catalyst and as an electrode of the solid electrolyte cell CO, O2, Full-size image (<1 K) (Full-size image (<1 K). Under open-circuit conditions the Pt catalyst film operates as a regular CO oxidation catalyst. It was found that electrochemical O2− pumping has a dramatic non-Faradaic effect on the steady-state and oscillatory behavior of CO oxidation on Pt. The steady-state reaction rate typically increases or decreases by a factor of 2 but a 500% increase in reaction rate is observed under severely reducing conditio...
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