Topics in Catalysis

, Volume 44, Issue 3, pp 409–417 | Cite as

Effect of microstructure on the electrochemical behavior of Pt/YSZ electrodes

  • A. Jaccoud
  • G. Fóti
  • R. Wüthrich
  • H. Jotterand
  • Ch. Comninellis

Two types of O2,Pt/YSZ electrode preparation (Pt/YSZ cermet and sputtered platinum film) have been characterized by SEM and by cyclic voltammetry and chronoamperometry at 450 °C in 20 kPa oxygen. Cyclic voltammetry on the cermet and on the as-sputtered non-porous film electrode evidenced the characteristics of the PtO x /Pt couple. The corresponding redox reaction occurs at the metal/electrolyte interface and it manifests itself by an anodic wave and one of more cathodic peaks in the voltammogram. Heat treatment of the sputtered electrode at 700 °C in oxygen atmosphere resulted in a porous structure by coalescence of the film. Cyclic voltammetry of the porous film electrode featured the characteristics of the O2/O2− couple, i.e. the redox reaction of gaseous oxygen occurring at the tpb. Chronoamperometry at anodic potentials showed similar features for both electrode preparations: an initial inhibition, a current peak and a slow activation, the latter being related to the phenomenon of electrochemical promotion of catalysis.


Pt/YSZ cermet electrode Pt film electrode microstructure cyclic voltammetry chronoamperometry 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • A. Jaccoud
    • 1
  • G. Fóti
    • 1
  • R. Wüthrich
    • 2
  • H. Jotterand
    • 3
  • Ch. Comninellis
    • 1
  1. 1.Institute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
  2. 2.Institute of Manufacturing Systems and RoboticsEcole Polytechnique Fédérale de LausanneLausanneSwitzerland
  3. 3.Institute of Physics of the Complex MatterEcole Polytechnique Fédérale de LausanneLausanneSwitzerland

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