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Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells

Author

Listed:
  • Maurizio Passaponti

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
    M.P. and L.L contributed equally to the manuscript.)

  • Leonardo Lari

    (Physics Department, University of York, Heslington, York YO10 5DD, UK
    The York-JEOL Nanocentre, Helix House, Science Park, Heslington, York YO10 5BR, UK
    M.P. and L.L contributed equally to the manuscript.)

  • Marco Bonechi

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy)

  • Francesca Bruni

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy)

  • Walter Giurlani

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy)

  • Gabriele Sciortino

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy)

  • Luca Rosi

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy)

  • Lorenzo Fabbri

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy)

  • Martina Vizza

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy)

  • Vlado K. Lazarov

    (Physics Department, University of York, Heslington, York YO10 5DD, UK
    The York-JEOL Nanocentre, Helix House, Science Park, Heslington, York YO10 5BR, UK)

  • Claudio Fontanesi

    (Department of Engineering ‘Enzo Ferrari’, University of Modena and Reggio Emilia, Via Vivarelli 10, 41125 Modena, Italy)

  • Massimo Innocenti

    (Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy)

Abstract

Oxygen Reduction Reaction (ORR) catalysts, from waste automobile tyres obtained from Microwave assisted pyrolysis (MAP), were enriched with Co and Cu using the simple treatments sonochemical and electrochemical deposition. Catalytic activity was evaluated through onset potential and number of exchanged electrons measurements. Electrochemical data demonstrate an improvement in catalytic activity of the electrochemical modified char with Co. Char electrodes enriched with Co show a maximum positive shift of 40 mV with respect to raw char electrodes with a number of exchanged electrons per O 2 molecule close to 4 (as for Pt) for the best sample. This corresponds to a reduction of the production of unwanted oxygen peroxide from 23% for raw char to 1%. Sample structure evolution before and after electrochemical deposition and electro-catalysis was investigated by scanning transmission electron microscopy and XPS. Such electrochemical treatments open new possibilities of refining waste chars and finding an economic alternative to noble metals-based catalysts for alkaline fuel cells.

Suggested Citation

  • Maurizio Passaponti & Leonardo Lari & Marco Bonechi & Francesca Bruni & Walter Giurlani & Gabriele Sciortino & Luca Rosi & Lorenzo Fabbri & Martina Vizza & Vlado K. Lazarov & Claudio Fontanesi & Massi, 2020. "Optimisation Study of Co Deposition on Chars from MAP of Waste Tyres as Green Electrodes in ORR for Alkaline Fuel Cells," Energies, MDPI, vol. 13(21), pages 1-13, October.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:21:p:5646-:d:436258
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    References listed on IDEAS

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    1. Chen, Kang-Shin & Lin, Yuan-Chung & Hsu, Kuo-Hsiang & Wang, Hsin-Kai, 2012. "Improving biodiesel yields from waste cooking oil by using sodium methoxide and a microwave heating system," Energy, Elsevier, vol. 38(1), pages 151-156.
    2. Gasparatos, A. & von Maltitz, G.P. & Johnson, F.X. & Lee, L. & Mathai, M. & Puppim de Oliveira, J.A. & Willis, K.J., 2015. "Biofuels in sub-Sahara Africa: Drivers, impacts and priority policy areas," Renewable and Sustainable Energy Reviews, Elsevier, vol. 45(C), pages 879-901.
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