Shmychkova O. Lead dioxide electrodes doped by metal compounds in high oxidation state

Electrocatalytic processes proceeding at high anodic potentials with oxygen-containing particles participation were the object of investigation. Electrodeposition regularities of lead dioxide electrodes doped with metal compounds in high oxidation states have been established in the thesis. The correlation between kinetic parameters of initial stages of crystallization and the phase composition of coatings, as well as the chemical composition and the electrocatalytic activity towards oxygen transfer reactions has been revealed. Methods: steady-state and cyclic voltammetry, chronoamperometry, electrode impedance, rotating disk electrode, photocolorimetry, fluorescence and specrophotometry, atomic absorption, high performance liquid chromatography, scanning electron and atomic force microscopy, X-Ray diffraction, energy dispersive X-ray spectroscopy. Theoretical and practical results: comprehensive data about the influence of additives on the kinetics of lead dioxide formation from methanesulfonate electrolytes were received. Lead dioxide, doped with bismuth ions was recommended as anode for the electrochemical conversion of p-nitrophenol and p-nitroaniline. The novelty of results: the presence of additives influences on kinetics of lead dioxide electrodeposition without process mechanism changing. It was proposed to use an amount of electricity that is coming on the formation of two dimensional nuclei as the correlation parameter to predict the phase composition of obtained deposits. The amount of hydroxyl radicals is proposed to use as a correlation parameter for predicting of electrocatalytic properties of materials. The field of use: results are essential for electrochemistry.