Electrochemical properties of thermally treated platinized Ebonex ® with low content of Pt
By Kasian, O.I.; Luk’yanenko, T.V.; Demchenko, P.; Gladyshevskii, R.E.; Amadelli, R. & Velichenko, A.B.
Published in Electrochimica Acta
NULL
2013
Abstract
Effect of thermal treatment on the physicochemical and electrochemical properties of platinized Ebonex® electrodes, containing low amount of Pt has been investigated. New phases in systems Ti–O (310 °C) and Pt–Ti–O (410 °C) were found for treated Ebonex® that affects electrochemical behavior of electrodes. Ebonex®/Pt-electrodes were shown to be n-type highly doped semiconductors, as well as Ebonex®. Increase in treatment temperature leads to both oxidation of titanium suboxides and diffusion of Pt deep into substrate and results in shift of flatband potential to positive values and decrease in donor concentration as a rule. The peak of reduction of Pt phase oxides on the cathodic branch of voltammograms could be correlated with electrocatalytic activity of platinized Ebonex®-electrodes since it characterizes the amount of electrochemically active platinum on the electrode surface. Thermally treated platinized Ebonex® anodes could be applied in a trivalent chromium electroplating bath.
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