IrO and TaO 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 carded out in order to characterize these materials. Electrochemical tests found the highest electrocatalytic activity for 50% IRO-50% TaO electrodes. SIMS analyses are in harmony with these results, and it is shown that IrO 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 TaO stabilizer.
Secondary ion mass spectrometry characterization of IrO2 -Ta2 O5 thin films: Effect of relative composition on electrode properties
Fabrizio M;Piccirillo C
1998
Abstract
IrO and TaO 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 carded out in order to characterize these materials. Electrochemical tests found the highest electrocatalytic activity for 50% IRO-50% TaO electrodes. SIMS analyses are in harmony with these results, and it is shown that IrO 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 TaO stabilizer.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
