Surface species formed as a function of the temperature during the preparation of RuO2/TiO2 mixed oxide films were identified by emission FTIR and FT-Raman spectroscopy. The formation of surface carbonyls from precursor mixtures of hydrated RuCl3 and Ti diisopropoxide bis(2,4-pentanedionate) was confirmed. The intensity of the CO stretching band increases with decreasing Ru content due to the increasing dispersity of the noble metal. The negative emission bands of the coating 20% Ru + 80% Ti proves the occurrence of a segregation phenomenon resulting in a TiO2-enriched surface layer. The results obtained are in agreement with those of previous measurements by simultaneous thermogravimetry-DTA (TGA-DTA), thermogravimetry combined with mass spectrometry (TGA-MS), and SIMS.
Investigation on the formation of RuO2-based mixed-oxide films by spectroscopic methods
DE BATTISTI, Achille
1995
Abstract
Surface species formed as a function of the temperature during the preparation of RuO2/TiO2 mixed oxide films were identified by emission FTIR and FT-Raman spectroscopy. The formation of surface carbonyls from precursor mixtures of hydrated RuCl3 and Ti diisopropoxide bis(2,4-pentanedionate) was confirmed. The intensity of the CO stretching band increases with decreasing Ru content due to the increasing dispersity of the noble metal. The negative emission bands of the coating 20% Ru + 80% Ti proves the occurrence of a segregation phenomenon resulting in a TiO2-enriched surface layer. The results obtained are in agreement with those of previous measurements by simultaneous thermogravimetry-DTA (TGA-DTA), thermogravimetry combined with mass spectrometry (TGA-MS), and SIMS.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
