CGO-based electrochemical catalysts for low temperature combustion of propene
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This study has shown that the phenomenon of electrochemical promotion of catalysis or NEMCA effect can be used to activate a metal catalyst for the propene deep oxidation in the presence of water in the feed and in both stoichiometric and lean-burn conditions. The electrochemical catalysts were based on sputtered Pt films interfaced with gadolinium-doped ceria solid electrolyte. This system allows implementing NEMCA effect at quite low temperatures and electrochemical activation of propene deep oxidation was evidenced at temperatures as low as 190 °C. In addition, a new design of electrochemical catalysts was proposed by depositing a interlayer of strontium-doped lanthanum manganite between the CGO dense support and an ultra-thin coating of Pt. This concept allows to drastically decrease the Pt loading since the electronic conductivity is ensured by the perovskite layer.
KeywordsElectrochemical promotion EPOC NEMCA effect Electrochemical catalyst CGO Strontium-doped lanthanum manganite interlayer Propene combustion Wet condition
The authors are grateful to the CNRS (Centre National de la Recherche Scientifique) and Peugeot Citroën Automobiles for the funding of this study.
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