Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 36, Pages 12769-12777Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201501144
Keywords
electrochemistry; iron; hydrogen evolution reaction; nanotubes; oxygen reduction reaction
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Funding
- Seventh Framework Programme [310651]
- ICTP TRIL Programme, Trieste, Italy
- FRS-FNRS (FRFC) [2.4.550.09]
- Belgian Government (IAP-PAI P7 network Functional Supramolecular Systems)
- MIUR through the FIRB Futuro in Ricerca SUPRACARBON [RBFR10DAK6]
- CONICET
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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 O-2 and H2O reactants and providing a cocoon that prevents uncontrolled Fe oxidation or leaching.
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