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Nanostructured Cobalt-Containing Carbon Supports for New Platinum Catalysts

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Abstract

Materials containing from 3.1 to 7.7 wt % of cobalt were obtained by electrodeposition of cobalt on Vulcan XC72 carbon powder in suspension. The composition and average diameter of CoO crystallites formed as result of cobalt oxidation in the process of filtering and drying materials, depending on the electrolysis conditions and electrolyte composition, were studied using thermogravimetry and XRD. It is shown that the maximum amount of cobalt can be deposited from electrolytes containing, along with cobalt sulfate, additives of copper and nickel sulfates. Calculations by the Scherrer equation showed that an increase in the CoO content leads to a decrease in the diameter of crystallites, the size of which is in the nano-range. The analysis of X-ray and electrochemical studies indicates the formation, in the course of the borohydride’s synthesis, of combined catalysts containing nanoparticles of the Pt3Co solid solution. The best PtCo/C material demonstrated significant improvement in ORR activity and superior stability compared to commercial Pt/C catalyst of the same platinum loading.

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Authors and Affiliations

  1. Southern Federal University, Rostov-on-Don, Russia

    L. M. Skibina, D. K. Mauer, V. A. Volochaev & V. E. Guterman

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  1. L. M. Skibina
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  2. D. K. Mauer
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  3. V. A. Volochaev
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  4. V. E. Guterman
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Correspondence to L. M. Skibina.

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Russian Text © The Author(s), 2019, published in Elektrokhimiya, 2019, Vol. 55, No. 4, pp. 424–435.

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Skibina, L.M., Mauer, D.K., Volochaev, V.A. et al. Nanostructured Cobalt-Containing Carbon Supports for New Platinum Catalysts. Russ J Electrochem 55, 438–448 (2019). https://doi.org/10.1134/S1023193519050136

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  • DOI: https://doi.org/10.1134/S1023193519050136

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