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Electrochemical modification of the catalytic activity of TiO2/YSZ supported rhodium films

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The electrochemical activation of ethylene oxidation was studied over rhodium catalysts of different thickness (40, 100 and 160 nm) sputtered on top of a thin layer of TiO2 deposited on YSZ. The strong relationship between catalytic activity and oxidation state of rhodium was confirmed. Under open-circuit operation the catalyst potential appears as a suitable indicator of the surface oxidation state of rhodium allowing a prediction of the catalytic behavior from solid electrolyte potentiometric measurements. Under closed-circuit conditions the catalyst potential was used as a tool to tune the catalytic activity of rhodium which showed increasing promotional efficiency with decreasing catalyst film thickness.

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Authors and Affiliations

  1. Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland

    E. A. Baranova, G. Fóti & Ch. Comninellis

  2. Institute of Physics of the Complex Matter, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland

    H. Jotterand

Authors
  1. E. A. Baranova
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  2. G. Fóti
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  3. H. Jotterand
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  4. Ch. Comninellis
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Correspondence to G. Fóti.

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Baranova, E.A., Fóti, G., Jotterand, H. et al. Electrochemical modification of the catalytic activity of TiO2/YSZ supported rhodium films. Top Catal 44, 355–360 (2007). https://doi.org/10.1007/s11244-006-0127-1

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  • DOI: https://doi.org/10.1007/s11244-006-0127-1

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