IrO2 and Ta2O5 mixed oxide coatings were deposited on Ti supports in order to fabricate dimensionally stable electrodes used in chloro-alkali technology. Secondary ion mass spectrometry (SIMS) and electrochemical experiments were carried out in order to characterize these materials. Electrochemical tests found the highest electrocatalytic activity for 50% IrO2–50% Ta2O5 electrodes. SIMS analyses are in harmony with these results, and it is shown that IrO2 is more diluted on the surface for noble metal oxide concentrations higher than 50%. Finally, it was observed by SIMS that support material migration was favoured at the highest concentrations of Ta2O5 stabilizer.

Secondary Ion Mass Spectrometry Characterization of IrO2-Ta2O5 Thin Films: Effect of Relative Composition on Electrode Properties

DE BATTISTI, Achille;NANNI, Luca;
1998

Abstract

IrO2 and Ta2O5 mixed oxide coatings were deposited on Ti supports in order to fabricate dimensionally stable electrodes used in chloro-alkali technology. Secondary ion mass spectrometry (SIMS) and electrochemical experiments were carried out in order to characterize these materials. Electrochemical tests found the highest electrocatalytic activity for 50% IrO2–50% Ta2O5 electrodes. SIMS analyses are in harmony with these results, and it is shown that IrO2 is more diluted on the surface for noble metal oxide concentrations higher than 50%. Finally, it was observed by SIMS that support material migration was favoured at the highest concentrations of Ta2O5 stabilizer.
1998
S., Daolio; DE BATTISTI, Achille; M., Fabrizio; Nanni, Luca; C., Piccirillo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1200746
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