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Carboxylated, Fe‐Filled Multiwalled Carbon Nanotubes as Versatile Catalysts for O 2 Reduction and H 2 Evolution Reactions at Physiological pH
Author(s) -
Bracamonte M. Victoria,
Melchionna Michele,
Stopin Antoine,
Giulani Angela,
Tavagnacco Claudio,
Garcia Yann,
Fornasiero Paolo,
Bonifazi Davide,
Prato Maurizio
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201501144
Subject(s) - catalysis , oxygen reduction reaction , electron transfer , carbon nanotube , chemical engineering , materials science , carbon fibers , leaching (pedology) , electrocatalyst , redox , electrode , chemistry , nanotechnology , inorganic chemistry , electrochemistry , photochemistry , organic chemistry , environmental science , composite material , composite number , soil science , engineering , soil water
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 H 2 O reactants and providing a cocoon that prevents uncontrolled Fe oxidation or leaching.