Catalytic activity of carbon supported Pt nano(electrocatalysts. Why reducing the size of Pt nanoparticles is not always beneficial

Abstract : Carbon-supported Pt catalysts prepared by the impregnation method in water - dimethyl sulfoxide (DMSO) solutions were investigated. Using X-ray diffraction (XRD) technique for estimation of the particle size and shapes, we show that morphology of the Pt/C catalysts depends strongly on the DMSO content in the solutions. The average particles size reduces and a shape of the Pt nanocrystals changes from a truncated octahedron to a cuboctahedron, and eventually to a truncated cube with increasing DMSO concentration in the reaction mixture. Antibate effects of the size and shape cause non-monotonic dependence of the catalytic activity for the oxygen reduction reaction (ORR) with electric current maximum at an average particle size of 2.7nm.
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Article dans une revue
Journal of Physical Chemistry C, American Chemical Society, 2011, 115 (13), pp.5429-5434. 〈10.1021/jp1109477〉
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https://hal.archives-ouvertes.fr/hal-00601363
Contributeur : Christine Vinée-Jacquin <>
Soumis le : vendredi 17 juin 2011 - 14:34:22
Dernière modification le : lundi 29 octobre 2018 - 14:34:18

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I.N. Leontyev, S.V. Belenov, V.E. Guterman, P. Haghi-Ashtiani, A.P. Shaganov, et al.. Catalytic activity of carbon supported Pt nano(electrocatalysts. Why reducing the size of Pt nanoparticles is not always beneficial. Journal of Physical Chemistry C, American Chemical Society, 2011, 115 (13), pp.5429-5434. 〈10.1021/jp1109477〉. 〈hal-00601363〉

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