Abstract
Comparative study of two types of single-wall carbon nanotubes and standard carbon black Vulcan XC-72 as supports for catalysts of reactions proceeding in fuel cells is carried out. The nanotubes were prepared by arc method; they differed in the degree of their purifying from amorphous carbon and metal impurities. The structure and hydrophobic-hydrophilic properties of these carbon supports are studied by etalon porosimetry. The effect of the supports’ specific surface area on the deposited catalyst particles size and specific surface area is studied. The catalysts (Pt-Ru and Pt) were deposited from aqueous solutions of their salts. Platinum was also deposited by thermal decomposition of ethoxy clusters. It is shown that in methanol oxidation reaction at the Pt-Ru catalysts the current values per unit true surface area do not depend on the support nature, provided the catalyst loading is equal and the particle size is similar. When oxygen is reduced at platinum deposited onto purified nanotubes and the carbon black Vulcan XC-72, specific kinetic currents also are close to each other. It is shown that the degree of nanotubes purification and their structure affect the kinetics of this reaction significantly.
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Original Russian Text © E.K. Tuseeva, N.A. Mayorova, V.E. Sosenkin, N.F. Nikol’skaya, Yu. M. Vol’fkovich, A.V. Krestinin, G.I. Zvereva, V.A. Grinberg, O.A. Khazova, 2008, published in Elektrokhimiya, 2008, Vol. 44, No. 8, pp. 955–964.
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Tuseeva, E.K., Mayorova, N.A., Sosenkin, V.E. et al. Carbon nanotubes as a support for Pt-and Pt-Ru-catalysts of reactions proceeding in fuel cells. Russ J Electrochem 44, 884–893 (2008). https://doi.org/10.1134/S1023193508080028
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DOI: https://doi.org/10.1134/S1023193508080028