Characterization of doped tin dioxide anodes prepared by a sol-gel technique and their application in an SPE-reactor

Anodes for the electrocatalytic oxidation of organic pollutants in water ha ve been prepared by depositing novel Sb-doped SnO2 material on Ti supports by the sol-gel technique. Surface analysis of the anodes by nuclear micropr obe and XPS-measurements confirmed the formation of a doped film on the sub strate. Large scale porous titanium electrodes, up to 50 cm(2), have been c oated with doped SnO2 for a galvanostatic solid polymer electrolyte (SPE) a pplication, resulting in very low voltage across the stack, even without ad ding supporting electrolytes to the water. Assessment of the cell performan ce was carried out using N,N-dimethyl-p-nitrosoaniline (RNO) as a spin trap for . OH-radicals and phenol as a standard organic contaminant. Kinetic st udies were done for the formation of the . OH-radicals.