Abstract
We investigate the activity of bimetallic PtM/C (M = Ni, Co) catalysts with different microstructures and platinum catalysts supported on a nanostructured composite carrier (SnO2/C) in the electrooxidation reaction of methanol. For bimetallic catalysts, the effect of heat treatment on their structural and functional characteristics is also studied. Among bimetallic catalysts in the as-obtained state, the Pt@Ni/C catalyst prepared by the subsequent reduction of nickel and platinum from solutions of their compounds exhibited the highest activity in the methanol electrooxidation, significantly exceeding that for the commercial Pt/C product. Heat treatment at 350°C increased the activity of the PtCo/C catalyst containing nanoparticles of a solid solution but adversely affected the tolerance of all the studied bimetallic catalysts to the intermediate products of methanol oxidation. All the studied Pt/(SnO2/C) materials demonstrated a higher mass activity in the electrooxidation reaction of methanol compared to commercial Pt/C and bimetallic systems, while the catalyst with a weight fraction of platinum of 12% and a molar ratio of Pt: SnO2 of 1: 1.1 showed the highest mass activity.
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Original Russian Text © V.S. Menshchikov, S.V. Belenov, V.E. Guterman, I.N. Novomlinskiy, A.K. Nevel’skaya, A.Yu. Nikulin, 2018, published in Elektrokhimiya, 2018, Vol. 54, No. 11, pp. 915–927.
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Menshchikov, V.S., Belenov, S.V., Guterman, V.E. et al. Methanol Electrooxidation on PtM/C (M = Ni, Co) and Pt/(SnO2/C) Catalysts. Russ J Electrochem 54, 937–948 (2018). https://doi.org/10.1134/S1023193518130293
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DOI: https://doi.org/10.1134/S1023193518130293