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Media type:
E-Article
Title:
Bifunctional Metal‐Free Catalysis of Mesoporous Noble Carbons for Oxygen Reduction and Evolution Reactions
Contributor:
Sakaushi, Ken;
Fellinger, Tim‐Patrick;
Antonietti, Markus
Published:
Wiley, 2015
Published in:
ChemSusChem, 8 (2015) 7, Seite 1156-1160
Language:
English
DOI:
10.1002/cssc.201500102
ISSN:
1864-5631;
1864-564X
Origination:
Footnote:
Description:
AbstractElectrochemical oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are key reactions in lithium–oxygen batteries (LOBs) being a promising candidate to store renewable energies due to their high specific energy. However current development on LOBs is suffering from unsuitable catalysts. In particular, carbon‐based catalysts were found to perform poorly in this system. Here, we show that metal‐free mesoporous nitrogen‐doped carbons (meso‐NdCs) offer highly promising performances in both ORR and OER; they act as bifunctional catalysts, and can be synthesized by a very simple method. The efficient electrocatalytic activity of ORR and OER was used in a LOB cell during discharge and charge, respectively, and the present system showed a lower overpotential comparable to metal‐based catalysts in LOB system. Thus, we demonstrate that meso‐NdCs act as a new and affordable candidate for the efficient bifunctional oxygen catalysis, therefore can be applied to many energy‐related applications.