Journal of Applied Electrochemistry

, Volume 8, Issue 2, pp 135–143

Ruthenium dioxide-based film electrodes

III. Effect of chemical composition and surface morphology on oxygen evolution in acid solutions


  • G. Lodi
    • Laboratory of Electrochemistrythe University
  • E. Sivieri
    • Laboratory of Electrochemistrythe University
  • A. De Battisti
    • Laboratory of Electrochemistrythe University
  • S. Trasatti
    • Laboratory of Electrochemistrythe University

DOI: 10.1007/BF00617671

Cite this article as:
Lodi, G., Sivieri, E., De Battisti, A. et al. J Appl Electrochem (1978) 8: 135. doi:10.1007/BF00617671


Oxygen evolution from acid solutions has been investigated on two kinds of RuO2-based electrodes; compact and cracked (porous) films. The kinetic study has been carried out by means of potentiostatic curves. A method is suggested to estimate the surface concentration of active sites. The reaction order with respect to active sites and the activation energy have been determined. The mechanism is shown to differ on the two kinds of film in relation to theS(site)-OH bond strength and the surface concentration of intermediates. The behaviour of films on silica glass substrates is reported for the first time.

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© Chapman and Hall Ltd 1978