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Investigation of RuO2-IrO2-SnO2 thin film evolution

A thermoanalytical and spectroscopic study

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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.

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Authors and Affiliations

  1. Department of Environmental Engineering and Chemical Technology, University of Veszprém, Veszprém, Hungary, 158, 8201

    Elizabet Horváth & Á. Rédey

  2. Department of Analytical Chemistry, University of Veszprém, Veszprém, Hungary, 158, 8201

    J. Kristóf & V. Vágvölgyi

  3. Department of Chemistry, University of Ferrara, Ferrara, Italy, 44100, Via L. Borsari 46

    L. Vázquez-Gómez

Authors
  1. Elizabet Horváth
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  2. J. Kristóf
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  3. L. Vázquez-Gómez
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  4. Á. Rédey
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  5. V. Vágvölgyi
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Correspondence to Elizabet Horváth.

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Horváth, E., Kristóf, J., Vázquez-Gómez, L. et al. Investigation of RuO2-IrO2-SnO2 thin film evolution. J Therm Anal Calorim 86, 141–146 (2006). https://doi.org/10.1007/s10973-006-7578-2

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  • DOI: https://doi.org/10.1007/s10973-006-7578-2

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