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Electrochemical Preparation of N-Doped Cobalt Oxide Nanoparticles with High Electrocatalytic Activity for the Oxygen-Reduction Reaction.
- Source :
- Chemistry - A European Journal; Mar2014, Vol. 20 Issue 12, p3457-3462, 6p
- Publication Year :
- 2014
-
Abstract
- Nitrogen-doped CoO (N-CoO) nanoparticles with high electrocatalytic activity for the oxygen-reduction reaction (ORR) were fabricated by electrochemical reduction of CoCl<subscript>2</subscript> in acetonitrile solution at cathodic potentials. The initially generated, highly reactive nitrogen-doped Co nanoparticles were readily oxidized to N-CoO nanoparticles in air. In contrast to their N-free counterparts (CoO or Co<subscript>3</subscript>O<subscript>4</subscript>), N-CoO nanoparticles with a N content of about 4.6 % exhibit remarkable ORR electrocatalytic activity, stability, and immunity to methanol crossover in an alkaline medium. The CoN<subscript> x</subscript> active sites in the CoO nanoparticles are held responsible for the high ORR activity. This work opens a new path for the preparation of nitrogen-doped transition metal oxide nanomaterials, which are promising electrocatalysts for fuel cells. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 20
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 94914844
- Full Text :
- https://doi.org/10.1002/chem.201303814