Studies of electrochemical behaviour of RuO2-PVC film electrodes: dependence on oxide preparation temperature

Ruthenium dioxide electrodes, prepared on a Pt substrate using coatings of PVC-RuO₂ mixed in THF (designated as RuO₂-PVC film electrode) have been studied for their redox behaviour in 1 M NaOH using variable scan cyclic voltammetry. The various redox transitions in the oxidation state of the central metal ion are characterized using electrochemical parameters such as peak potential, peak current, and surface charge. The effect of oxide preparation temperature, in the range 300–700 °C, on the redox characteristics has also been studied and correlated with the electrochemically active surface area (as measured using small amplitude cyclic voltammetry) and the true surface area (by the BET method). Received: 12 August 1997 / Accepted: 18 October 1999