The processes of formation of RuO2/TiO2 coatings from precursor salts dissolved in isopropanol were followed by combined thermoanalytical and mass-spectrometric methods. The electrochemical characterization of the coatings was carried out by cyclic voltammetry. The pyrolysis of the titanium precursor salt, titanium diisopropoxide bis-2,4-pentanedionate, consists of four stages and involves the formation of elemental carbon in the coating. The steps of solvent desorption, oxidative cracking and combustion could be detected by comparison of the curves obtained. In the case of the pyrolysis of ruthenium and titanium salt mixtures, owing to the catalytic effect of the noble metal addition, the final decomposition temperature was reduced by more than 100 degrees C. In the main combustion step an almost complete conversion of the organic matter to CO2 and H2O takes place. The highest rate of decomposition and of heat release is observed for a coating composition between 10 and 30 mol% of Ru. Cyclic voltammetry experiments showed that the maximum charge-storage capacity, as indicated by larger surface areas, is also observed in this composition range.

Thermoanalytical investigation of the formation of RuO2-based mixed oxide films

DE BATTISTI, Achille;
1994

Abstract

The processes of formation of RuO2/TiO2 coatings from precursor salts dissolved in isopropanol were followed by combined thermoanalytical and mass-spectrometric methods. The electrochemical characterization of the coatings was carried out by cyclic voltammetry. The pyrolysis of the titanium precursor salt, titanium diisopropoxide bis-2,4-pentanedionate, consists of four stages and involves the formation of elemental carbon in the coating. The steps of solvent desorption, oxidative cracking and combustion could be detected by comparison of the curves obtained. In the case of the pyrolysis of ruthenium and titanium salt mixtures, owing to the catalytic effect of the noble metal addition, the final decomposition temperature was reduced by more than 100 degrees C. In the main combustion step an almost complete conversion of the organic matter to CO2 and H2O takes place. The highest rate of decomposition and of heat release is observed for a coating composition between 10 and 30 mol% of Ru. Cyclic voltammetry experiments showed that the maximum charge-storage capacity, as indicated by larger surface areas, is also observed in this composition range.
1994
DE BATTISTI, Achille; Kristof, J.; Liszi, J.; Barbieri, A.; Szabo, P.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/461091
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 28
  • ???jsp.display-item.citation.isi??? ND
social impact