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Au–MIL Nanocomposites with Enhanced Borohydride Oxidation Kinetics for Potential Use in Direct Liquid Fuel Cells

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  • Ines Belhaj

    (Centre of Physics and Engineering of Advanced Materials, Laboratory of Physics for Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal)

  • Alexander Becker

    (Centre of Physics and Engineering of Advanced Materials, Laboratory of Physics for Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
    Technical University of Clausthal, 38678 Clausthal-Zellerfeld, Germany)

  • Alexandre M. Viana

    (LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal)

  • Filipe M. B. Gusmão

    (Centre of Physics and Engineering of Advanced Materials, Laboratory of Physics for Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal)

  • Miguel Chaves

    (LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal)

  • Biljana Šljukić

    (Centre of Physics and Engineering of Advanced Materials, Laboratory of Physics for Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal)

  • Salete S. Balula

    (LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal)

  • Luís Cunha-Silva

    (LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal)

  • Diogo M. F. Santos

    (Centre of Physics and Engineering of Advanced Materials, Laboratory of Physics for Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal)

Abstract

A series of metal–organic framework-based materials of the MIL-101 family was prepared for potential application as anodic electrocatalysts in the direct borohydride fuel cell. The MIL-101-based materials were tested for borohydride oxidation reaction using cyclic voltammetry and chronoamperometry in alkaline media, with Au@MIL-101-NH 2 showing high responsiveness. The obtained data allow for the determination of kinetic parameters that characterize the borohydride oxidation on the prepared electrocatalysts. The activation energy for borohydride oxidation using an Au@MIL-101-NH 2 electrocatalyst was as low as 13.6 kJ mol −1 with a reaction order of 0.4. The anodic charge transfer coefficient was 0.85, and the number of transferred electrons was 7.97, matching the theoretical maximum value of 8 electrons transferred during the borohydride oxidation reaction. The promising performance of Au@MIL-101-NH 2 suggests its potential application as an anode for direct borohydride fuel cells.

Suggested Citation

  • Ines Belhaj & Alexander Becker & Alexandre M. Viana & Filipe M. B. Gusmão & Miguel Chaves & Biljana Šljukić & Salete S. Balula & Luís Cunha-Silva & Diogo M. F. Santos, 2025. "Au–MIL Nanocomposites with Enhanced Borohydride Oxidation Kinetics for Potential Use in Direct Liquid Fuel Cells," Energies, MDPI, vol. 18(17), pages 1-21, August.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:17:p:4503-:d:1731828
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    1. Uzundurukan, Arife & Akça, Elif Seda & Budak, Yağmur & Devrim, Yılser, 2021. "Carbon nanotube-graphene supported bimetallic electrocatalyst for direct borohydride hydrogen peroxide fuel cells," Renewable Energy, Elsevier, vol. 172(C), pages 1351-1364.
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