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Electrochemical properties of Ti/SnO2-Sb2O5 electrodes prepared by the spray pyrolysis technique

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Abstract

Cyclic voltammetry for the ferri-ferrocyanide redox couple has been used to study the Ti/SnO2-Sb2O5 electrode prepared by spray-pyrolysis under different conditions. The obtained results shows that increasing the preparation temperature and the duration of coating deposition results in a decrease of i p and an increase of ΔE p for the ferri-ferrocyanide couple. This deviation from reversibility has been attributed to the formation of a titanium oxide layer at the Ti/coating interface. Concerning oxygen evolution at the Ti/SnO2-Sb2O5 anodes, a mechanism is proposed in which water is discharged at the anode forming hydroxyl radicals which are further oxidized to form dioxygen. Finally, a generalized mechanism for oxygen evolution at oxide electrodes has been proposed.

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Correspondence to A. De Battisti.

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Correa-Lozano, B., Comninellis, C. & De Battisti, A. Electrochemical properties of Ti/SnO2-Sb2O5 electrodes prepared by the spray pyrolysis technique. J Appl Electrochem 26, 683–688 (1996). https://doi.org/10.1007/BF00241508

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Keywords

  • Oxide
  • Oxygen
  • Titanium
  • Hydroxyl
  • Pyrolysis