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Nanostructured bimetallic alloys prepared via mechanochemical synthesis as PEMFC electrocatalysts for automotive applications

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Abstract

Pt–Co alloys prepared by high energy ball milling synthesis were tested as electrocatalysts for hydrogen fueled Polymer Electrolyte Membrane Fuel Cells (PEMFC). In the present contribution we report on the first results regarding the electrochemical behaviour of two samples of Pt–Co alloys. One sample contains 20 wt.% alloy Pt:Co in the molar ratio 0.25:0.75 and C 80 wt.% and the second one Pt:Co in the molar ratio 0.75:0.25 and C 80 wt.%. The electrochemically active surface (EAS) was determined by cyclic voltammetry data while the electrocatalyst performance in a real cell was obtained by assembling Membrane Electrode Assemblies (MEAs) with the considered sample at the cathode. The results obtained, though indicating a lower performance than all-Pt catalysts, are quite interesting as they point out the importance of the C/Pt, Nafion/Pt and Pt/Co ratios that exert a deep influence onto the cell performance.

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Acknowledgements

The Italian Regione Piemonte Council (research project C104) contributed in financing the present research. The authors are grateful to Prof. P. Spinelli (Politecnico di Torino) for the mathematical interpretation of the experimental results. A special acknowledgment is for Gabriele Mulas (Università di Sassari) for all his work on mechanical milling. Prof. N. Penazzi (Politecnico di Torino) is gratefully acknowledged for the helpful discussions and support.

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Authors and Affiliations

  1. Department of Materials Science and Chemical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy

    Mihaela Aneta Dumitrescu, Carlotta Francia & Elisa Paola Ambrosio

  2. HySyLab—Hydrogen System Laboratory, Environment Park S.p.A.Via Livorno 60, 10144, Torino, Italy

    Marialaura Lucariello

  3. Università di Sassari, Via Vienna n. 2, 07100, Sassari, Italy

    Elisabetta Arca

  4. Università degli Studi di Torino, Via Pietro Giuria 7, 10125, Torino, Italy

    Maela Manzoli

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  1. Mihaela Aneta Dumitrescu
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  2. Marialaura Lucariello
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  3. Elisabetta Arca
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  4. Maela Manzoli
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  5. Carlotta Francia
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  6. Elisa Paola Ambrosio
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Correspondence to Mihaela Aneta Dumitrescu.

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Dumitrescu, M.A., Lucariello, M., Arca, E. et al. Nanostructured bimetallic alloys prepared via mechanochemical synthesis as PEMFC electrocatalysts for automotive applications. J Appl Electrochem 39, 2115–2121 (2009). https://doi.org/10.1007/s10800-009-9879-1

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  • DOI: https://doi.org/10.1007/s10800-009-9879-1

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