Abstract
Effect of molybdate-ions on the kinetics of partial reactions of dimethylamine-borane oxidation and nickel-and molybdate-ions reduction in the process of their chemical-catalytic reduction during the Ni-Mo-B-coatings deposition is studied. Molybdenum is deposited as metal only in the codeposition with nickel, yielding amorphous alloys. Adding of low concentration of the molybdate-ions to the nickel-plating solution increases the hydrogen evolution and alloy deposition rates as a result of the accelerating of dimethylamine-borane heterogeneous hydrolysis. At high molybdate-ion concentrations in the solution, a denser film of the molybdate reduction intermediate products forms at the electrode surface; this decreases the system’s catalytic activity as regards the dimethylamine-borane heterogeneous hydrolysis and thus decreases the hydrogen and nickel ions reduction rates.
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Original Russian Text © V.M. Krutskikh, M.V. Ivanov, A.B. Drovosekov, E.N. Loubnin, B.F. Lyakhov, Yu.M. Polukarov, 2008, published in Elektrokhimiya, 2008, Vol. 44, No. 6, pp. 784–791.
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Krutskikh, V.M., Ivanov, M.V., Drovosekov, A.B. et al. Formation mechanism and structure of nickel-molybdenum-boron chemical-catalytic coatings. Russ J Electrochem 44, 728–735 (2008). https://doi.org/10.1134/S102319350806013X
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DOI: https://doi.org/10.1134/S102319350806013X