Carboxylated,Fe‐Filled Multiwalled Carbon Nanotubes as Versatile Catalysts for O2 Reduction and H2 Evolution Reactions at Physiological pH |
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| Authors: | M. Victoria Bracamonte Dr. Michele Melchionna Dr. Antoine Stopin Angela Giulani Prof. Claudio Tavagnacco Dr. Yann Garcia Prof. Paolo Fornasiero Prof. Davide Bonifazi Prof. Maurizio Prato |
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| Affiliation: | 1. Department of Chemical and Pharmaceutical Sciences and INSTM UdR Trieste, University of Trieste, Via L. Giorgieri 1, 34127 Trieste (Italy);2. Instituto de Física Enrique Gaviola (CONICET) and FaMAF, Universidad Nacional de Córdoba, Medina Allende s/n, X5000HUA Córdoba (Argentina);3. Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, 5000 Namur (Belgium);4. Institute of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de Louvain, Place L. Pasteur 1, Louvain‐la‐Neuve, 1348 (Belgium);5. ICCOM‐CNR Trieste Research Unit, Trieste (Italy) |
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| Abstract: | The development of new electrocatalysts for the oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) at physiological pH is critical for several fields, including fuel cells and biological applications. Herein, the assembly of an electrode based on carboxyl‐functionalised hydrophilic multiwalled carbon nanotubes (MWCNTs) filled with Fe phases and their excellent performance as electrocatalysts for ORR and HER at physiological pH are reported. The encapsulated Fe dramatically enhances the catalytic activity, and the graphitic shells play a double role of efficiently mediating the electron transfer to O2 and H2O reactants and providing a cocoon that prevents uncontrolled Fe oxidation or leaching. |
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| Keywords: | electrochemistry iron hydrogen evolution reaction nanotubes oxygen reduction reaction |
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