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Synthesis and structural, magnetic and electrochemical characterization of PtCo nanoparticles prepared by water-in-oil microemulsion

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Abstract

PtCo nanoparticles with homogeneous size (around 3–4 nm) have been synthesized in a water-in-oil microemulsion of water/polyethylenglycol–dodecylether (BRIJ®30)/n-heptane. X-ray diffraction study revealed the formation of a cubic phase with a gradual decrease of the cell parameter with increasing cobalt incorporation in the crystalline lattice of platinum. In relation to their magnetic properties, the PtCo nanoparticles present a superparamagnetic behaviour even after annealing, although higher permeability was induced by the thermal treatment. Finally, the electrocatalytic activity of the particles towards oxalic acid oxidation in H2SO4 was evaluated. The Pt74Co26 nanoparticles showed the highest reactivity for this reaction.

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Acknowledgements

This study has been financially supported by the Ministerio de Educación y Ciencia of Spain through projects CSD2006-12 and CTQ2006-04071/BQU. E. Gómez and E. Vallés wish to thank also the Serveis Cientificotècnics (Universitat de Barcelona) for the use of their equipment.

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Authors and Affiliations

  1. Instituto de Electroquímica, Universidad de Alicante, Apartado 99, 03080, Alicante, Spain

    J. Solla-Gullón, Antonio Aldaz & Juan M. Feliu

  2. Departamento Química Física, Instituto de Nanociencia y Nanotecnologia de la Universidad de Barcelona (IN2UB), Martí i Franquès 1, 08028, Barcelona, Spain

    Elvira Gómez & Elisa Vallés

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  1. J. Solla-Gullón
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  2. Elvira Gómez
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  3. Elisa Vallés
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  4. Antonio Aldaz
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  5. Juan M. Feliu
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Correspondence to J. Solla-Gullón.

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Solla-Gullón, J., Gómez, E., Vallés, E. et al. Synthesis and structural, magnetic and electrochemical characterization of PtCo nanoparticles prepared by water-in-oil microemulsion. J Nanopart Res 12, 1149–1159 (2010). https://doi.org/10.1007/s11051-009-9680-4

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