Search academic texts

Information × Registration Number 0212U004861, 0109U004722 , R & D reports Title Electrochemical laws governing electrode reactions for depositing functional coatings under the conditions of induced codeposition of iron group metals with tungsten and molybdenum popup.stage_title Head Kublanovsky Valery Semonovich, Доктор хімічних наук Registration Date 06-02-2012 Organization V.I.Vernadskii Institute of General and Inorganic Chemistry NASU popup.description2 Report on research work: 114 pages, 1 book, 78 figures, 18 tables, 135 references. Object of investigation: heterogeneous electrochemical processes which occur in complex salt electrolytes with the formation of electrochemically active complexes at the electrode; electroreduction of oxygen at electrocatalysts: heterobinuclear 3d metal complexes pyrolyzed on a carbon matrix. Aim of the work: studying kinetic laws governing the discharge of iron group metals with molybdenum and tungsten into an alloy from mono- and polyligand complex salt (citrate, pyrophosphate and glycinate) electrolytes. Investigating bimetallic palladium-base alloys with iron group triad and determining the tolerance of electrocatalysts towards ethanol in alkaline solutions in the case of oxygen reduction. Method of investigation: potentiostatic and potentiodynamic voltammetry, cyclic voltammetry, impedance spectroscopy, Auger spectroscopy, pH measurements, IR spectrometry, atomic adsorption spectroscopy, elemental thermogravimetric analysis, method of thermodesorption with mass spectrometric analysis of desorbing particles, X-ray phase analysis, scanning tunnel microscopy, tribology, microhardness measurements, mathematical computer simulation. Electrocatalytic nanostructures, based on heterobinuclear 3d metal complexes, for electrochemical power sources have been synthesized on a carbon matrix. It has been shown that the electrocatalytic activity for catalysts obtained on the basis of complexes with hmdta4- and 3d metals is in the order: Co>Cu>Fe>Mn>Zn>Ni>Cr depending on central atom. The interrelation between the composition, structure and corrosion resistance of electrolytic coatings deposited at different current densities on different substrates in the stationary and pulsed electrolysis modes with high sodium tungstate concentration has been studied. The laws governing the occurrence of complex electrochemical processes have been established, and a theory of controlling their kinetics has been worked out, which makes it possible to purposively choose electrocatalytic materials and electrolytes for electrochemical power sources, fuel cells, sensors, for the needs of functional electroplating technology. ELECTROCATALYSIS, ELECTROCATALYSTS, ELECTROCHEMICALLY ACTIVE COMPLEXES, ELECTROREDUCTION, FUNCTIONAL ELECTROPLATING TECHNOLOGY. Terms of submission of the report: according to agreement, V.I. Vernadskii Institute of General and Inorganic Chemistry of the Ukrainian NAS, prospect Palladina 32-34, 03680 Kyiv 142. Product Description popup.authors А.В. Березовська В.М. Нікітенко Г.В. Молодід К.П. Руденко О.Л. Берсірова С.В. Бик С.В. Нечипорчук С.Л.Фесик Ю.К. Пірський Ю.С. Японцена popup.nrat_date 2020-04-02 Close