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Electroreduction of Mo(VI) Compounds in Ammonium–Acetate Solutions

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Abstract

The kinetics of cathodic reactions in ammonium acetate solutions proposed for electrodeposition of metallic molybdenum was studied. The reduction of molybdenum compounds in the oxidation state +6 was found to occur stepwise according to the scheme Mo(VI) → Mo(V) → Mo(III). The waves observed on the polarograms are complicated by adsorption effects. The reduction of molybdenum to the metallic state is possible only at high negative potentials of the cathode; under the polarographic analysis conditions, this wave was not recorded. The deposit that formed on the surface of the solid cathode during cathodic polarization (i = 0.5 A cm–2) contains both molybdenum in the metallic state and molybdenum oxides. The ratio between the electrolysis products depends on the temperature of solution: a decrease in the temperature leads to an increase in the amount of metallic molybdenum.

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Authors and Affiliations

  1. Mendeleev University of Chemical Technology of Russia, Moscow, 125047, Russia

    V. V. Kuznetsov, M. A. Volkov, D. A. Zhirukhin & E. A. Filatova

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  1. V. V. Kuznetsov
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  2. M. A. Volkov
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  3. D. A. Zhirukhin
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  4. E. A. Filatova
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Correspondence to V. V. Kuznetsov.

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Original Russian Text © V.V. Kuznetsov, M.A. Volkov, D.A. Zhirukhin, E.A. Filatova, 2018, published in Elektrokhimiya, 2018, Vol. 54, No. 12, pp. 1025–1031.

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Kuznetsov, V.V., Volkov, M.A., Zhirukhin, D.A. et al. Electroreduction of Mo(VI) Compounds in Ammonium–Acetate Solutions. Russ J Electrochem 54, 1006–1011 (2018). https://doi.org/10.1134/S1023193518130256

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  • DOI: https://doi.org/10.1134/S1023193518130256

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