THE ROLE OF HYDRATED OXIDES IN FORMATION AND STRUCTURE OF DSA-TYPE OXIDE ELECTROCATALYSTS

The form and the interaction of species in precursor solutions for DSA -type electrocatalysts preparation have been investigated. These facto rs correlation with the real composition and structure of these oxide electrodes, characterized by XDA, TEM, SEM, XPS and IRS has been found . The great degree of the original metal salt hydrolysis and the forma tion of hydrated oxide intermediates have been revealed. Participation of hydrated oxide forms at the hydrolytic as well as the pyrolytic st age of coating formation is the general and the most typical feature t hat determines the composition and structure of all investigated oxide electrodes.