Nenastina T. Improvement of the electrochemical technique for palladium and palladium-nickel alloy catalytic coating

Research object: electrochemical processes for creation of catalytically active methods for palladium-containing systems. Research purpose: improvement of galvanic methods used for catalytically active palladium-containing systems production. Research methods: linear and cyclic voltammetry, potentiometry, photocolorimetric method, X-ray fluorescence analysis, electronic scanning microscopy, impedance spectroscopy. Theoretical and practical results, novelty: the author proposed an electrochemical method of heat-resistant alloy carrier surface preparation; determined the kinetic parameters of highly-developed specific surface formation process; determined instability constants for pyrophosphate and pyrophosphate-ammonia palladium complexes; established the pattern of palladium cathodic reduction from a complex electrolyte and proved that the previous chemical stage of complexes' dissociation is the limiting one; in order to identify palladium-containing coatings deposition process proposed the implementation of pulse modes for electrolysis which allowed to increase the content of base metal in the alloy and the current efficiency; determined corrosion resistance and catalytic activity of palladium-containing coatings in electrochemical processes and gas-cycle reactions. A process flow-sheet for palladium-nickel galvanic alloy production process is developed. There are 3 declarative invention patents of Ukraine obtained according to the thesis results. Implementation degree: implemented. Usage area: cassette catalyst converters for motor vehicles