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Journal of Thermal Analysis and Calorimetry

, Volume 86, Issue 1, pp 141–146 | Cite as

Investigation of RuO2-IrO2-SnO2 thin film evolution

A thermoanalytical and spectroscopic study
  • Elizabet Horváth
  • J. Kristóf
  • L. Vázquez-Gómez
  • Á. Rédey
  • V. Vágvölgyi
Article

Abstract

The thermal evolution process of RuO2–IrO2–SnO2 mixed oxide thin films of varying noble metal contents has been investigated under in situ conditions by thermogravimetry-mass spectrometry (TG-MS), infrared emission spectroscopy (IR) and cyclic voltammetry (CV). The gel-like films prepared from aqueous solutions of the precursor compounds RuOHCl3, H2IrCl6 and Sn(OH)2(CH3COO)2–xClx on titanium metal support were heated in an atmosphere containing 20% O2 and 80% Ar up to 600°C. Chlorine evolution takes place in a single step between 320 and 500°C accompanied with the decomposition of the acetate ligand. The decomposition of surface species formed like carbonyls, carboxylates and carbonates occurs in two stages between 200 and 500°C. The temperature of chlorine evolution and that of the final film formation increases with the increase of the iridium content in the films. The anodic peak charge shows a maximum value at 18% iridium content.

Keywords

electrocatalysis IrO2 RuO2 SnO2 sol–gel process thin films 

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Elizabet Horváth
    • 1
  • J. Kristóf
    • 2
  • L. Vázquez-Gómez
    • 3
  • Á. Rédey
    • 1
  • V. Vágvölgyi
    • 2
  1. 1.Department of Environmental Engineering and Chemical TechnologyUniversity of VeszprémVeszprémHungary
  2. 2.Department of Analytical ChemistryUniversity of VeszprémVeszprémHungary
  3. 3.Department of ChemistryUniversity of FerraraFerraraItaly

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