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Synthesis of Co–Pd alloys by co-electroreduction of aquachloro-cobalt(II) and palladium(II) complexes

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Abstract

The work presents results of the studies on the synthesis of Co–Pd alloys from acid electrolytes containing chloride ions. The main aim of the tests was to identify reactions responsible for alloy formation and to determine an influence of the electrolysis parameters, i.e. working electrode potential, electrolyte composition and temperature on the composition of the resulted alloy coatings. Electrochemical investigations were performed by applying cyclic voltammetry (CV) combined with electrochemical quartz crystal microbalance (EQCM). The electrolyte composition was selected based on a thermodynamic analysis and spectrophotometric tests which were described in our previous papers [1, 2]. They allowed determination of equilibrium distribution of the metals complex forms and a stability analysis of the electrolyte. The alloys were synthesized within the potential range from −0.7 to −1.1 V. The tests indicate a possibility of alloys synthesis already at the potential range < −0.5 V. The alloys composition was analysed with the use of the EDS technique. The obtained alloys featured Pd content from 0.84 to 71.37 at.%.

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Acknowledgments

This work was supported by Polish National Science Centre under grant 2011/01/N/ST5/05509 and Polish Ministry of Science and Higher Education under grant IP2012/001072.

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Authors and Affiliations

  1. Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals, Faculty of Non-Ferrous Metals, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059, Krakow, Poland

    K. Mech, P. Zabiński & R. Kowalik

  2. Department of Materials Science and Non-Ferrous Metals Engineering, Faculty of Non-Ferrous Metals, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059, Krakow, Poland

    G. Boczkal & P. Pałka

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  1. K. Mech
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  2. G. Boczkal
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  5. R. Kowalik
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Correspondence to K. Mech.

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Mech, K., Boczkal, G., Pałka, P. et al. Synthesis of Co–Pd alloys by co-electroreduction of aquachloro-cobalt(II) and palladium(II) complexes. J Solid State Electrochem 18, 3121–3127 (2014). https://doi.org/10.1007/s10008-013-2363-1

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  • DOI: https://doi.org/10.1007/s10008-013-2363-1

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