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PtCu/C Materials Doped with Different Amounts of Gold as the Catalysts of Oxygen Electroreduction and Methanol Electrooxidation

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Abstract

The effect of the amount of gold used as the dopant of PtCu nanoparticles on the structure of PtCuAu/Cu catalysts and their activity in the reactions of oxygen reduction and methanol electrooxidation is studied. The PtCuAu/C materials containing from 3 to 20% of gold are prepared by galvanic displacement of copper atoms by gold atoms on the surface of already prepared PtCu nanoparticles. The addition of 5 at % Au to the composition of nanoparticles doubles their activity in the methanol oxidation and increases their activity in the oxygen reduction by a factor of 1.7 as compared with the commercial Pt/C material JM40. This study confirms that multicomponent platinum-containing nanoparticles supported by a highly disperse carbon material and having gold atoms deposited on their surface show promise as the efficient catalysts for the methanol fuel cells. In contrast, the materials containing 10 at % Au and more are characterized by the presence of gold nanoparticles on the carbon support surface and exhibit the lower catalytic activity as compared with those containing less amounts of gold.

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Funding

The study was financially supported by the Russian Scientific Foundation (project no. 18-73-00161).

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Authors and Affiliations

  1. Southern Federal University, Faculty of Chemistry, 344006, Rostov-on-Don, Russia

    S. V. Belenov, V. S. Men’shchikov, A. Yu. Nikulin & N. M. Novikovskii

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  1. S. V. Belenov
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  2. V. S. Men’shchikov
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  3. A. Yu. Nikulin
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  4. N. M. Novikovskii
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Correspondence to S. V. Belenov.

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Translated by T. Safonova

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Belenov, S.V., Men’shchikov, V.S., Nikulin, A.Y. et al. PtCu/C Materials Doped with Different Amounts of Gold as the Catalysts of Oxygen Electroreduction and Methanol Electrooxidation. Russ J Electrochem 56, 660–668 (2020). https://doi.org/10.1134/S1023193520080029

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