SECONDARY-ION MASS-SPECTROMETRY STUDIES ON THE FORMATION OF THE VALVEMETAL-OXIDE IN RUTHENIUM-BASED AND IRIDIUM-BASED MIXED-OXIDE ELECTRODES

The process of TiO2 evolution from titanium diisopropoxide bis-2,4-pen tanedionate precursor on nickel and titanium supports was followed by secondary ion mass spectrometry, Concentration depth profiles of rutil e (TiO2) al higher temperatures showed completely different patterns f or the two supports, indicating the influence of the base metal on the formation and properties of the oxide coating. The formation and surf ace accumulation of elemental carbon during combustion of the organic matter were followed as a function of temperature, The results obtaine d are in agreement with those of previous measurements by simultaneous thermogravimetry-differential thermal analysis, thermogravimetry comb ined with mass spectrometry and emission FTIR spectrometry.