PtIr/C Catalysts Synthesized by Electrochemical Dispersion Method for Proton Exchange Membrane Fuel Cells
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PtIr/C electrocatalyst with the metal phase uniformly distributed over the carbon support surface and the average size of PtIr nanoparticles of 5.9 nm is synthesized by electrochemical dispersion of Pt90Ir10 alloy under the action of alternating pulse current. It is shown that the presence of iridium within the composition of a Pt/C catalyst lowers down the overpotential of CO oxidation and increases catalyst’s specific activity with respect to electrochemical oxidation of ethanol.
Keywordsiridium platinum electrochemical dispersion electrocatalysis fuel cell
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- 6.Tayal, J., Rawat, B., and Basu, S., Bi-metallic and trimetallic Pt–Sn/C, Pt–Ir/C, Pt–Ir–Sn/C catalysts for electro-oxidation of ethanol in direct ethanol fuel cell, Int. J. Hydrogen Energy, 2011, vol. 36, p. 14884.Google Scholar
- 7.Sahin, O., Kivrak, H., Karaman, M., and Atbas, D., The effect of iridium addition to platinum on the alcohol electrooxidation activity, Amer. J. Mater. Sci., 2015, vol. 3, p. 15.Google Scholar
- 8.Da Silva, S.G., Assumpção, M.H.M.T., De Souza, R.F.B., Buzzo, G.S., Spinacé, E.V., Neto, A.O., and Silva, J.C.M., Electrochemical and fuel cell evaluation of PtIr/C electrocatalysts for ethanol electrooxidation in alkaline medium, Electrocatalysis, 2014, vol. 5, p. 438.Google Scholar
- 14.Leontyev, I.N., Kuriganova, A.B., Leontyev, N.G., Hennet, L., Rakhmatullin, A., Smirnova, N.V., and Dmitriev, V., Size dependence of the lattice parameters of carbon supported platinum nanoparticles: X-ray diffraction analysis and theoretical considerations, RSC Adv., 2014, vol. 4, p. 35959.CrossRefGoogle Scholar