Emission FTIR studies on the formation mechanism of IrO2/TiO2 based coatings

J. Kristóf, J. Mink, A. De Battisti, J. Liszi

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Abstract

The formation reactions of IrO2/TiO2 mixed oxide films supported on metal titanium plate were followed by emission FTIR method. Coatings of the composition 50% Ir + 50% Ti obtained by thermal decomposition from the precursor mixture of IrCl3x3H2O/titanium(di-isopropoxide) bis-2,4-pentanedionate were preheated to 210, 392 and 500°C. At 210°C-in addition to 2,4-pentanedionate-the presence of surface carbonyls as a result of decomposition of solvent (isopropanol) chemisorbed to iridium was confirmed. At 500°C the negative emission bands of rutile prove the occurrence of a surface segregation phenomenon resulting in a TiO2 (or a TiO2-enriched) surface layer. The conversion of IrCl3 to IrO2 was also followed.

Original languageEnglish
Pages (from-to)1531-1535
Number of pages5
JournalElectrochimica Acta
Volume39
Issue number11-12
DOIs
Publication statusPublished - Aug 1994

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Keywords

  • electrocatalysis
  • electrode coatings
  • emission FTIR
  • mixed oxide films
  • thin films

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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