ELECTROCHEMICAL PROPERTIES OF MOLYBDENUM IN AN AQUEOUS SOLUTION OF DIMETHYLESULPHOXIDE

Molybdenum and its compounds are widely used in production and industry due to their properties, such as mechanical strength, heat resistance, high electrical conductivity, high melting point and electrochemical catalytic activity. Therefore, their processing is undoubtedly a very urgent problem. One of the ways to solve this problem is associated with the use of aqueous-organic electrolyte solutions. The purpose of the work: to determine the patterns of electrochemical dissolution of molybdenum in aqueous solutions of dimethyl sulfoxide. Research methods. The work uses electrochemical (polarization measurements, electrolysis), X-ray spectral, microphotographs, and mathematical analysis methods. Results and discussion. Electrochemical dissolution of molybdenum in 0.25 M, 0.5 M, and 2 M LiCl solutions in an aqueous solution of dimethyl sulfoxide at different potential transfer rates is considered. The presence of water in electrolytes enhances the process of molybdenum transition into solution, the appropriate concentration of 0.25 M LiCl water was 38 mol/L H2O. At these electrolyte concentrations, the thickness of the film formed on the molybdenum surface was estimated, the distance between adjacent defects, and the electrical conductivity of the film were determined. Concept. Electrochemical properties of the molybdenum electrode in an aqueous solution of dimethyl sulfoxide do not obey the laws of classical electrochemistry. Separation of molybdenum from the solid phase under such electrolytic conditions will undoubtedly have great application, for example, in the processing of solid foundry waste and the production of biosensors.