Cobalt-Based Active Species Molecularly Immobilized on Carbon Nanotubes for the Oxygen Reduction Reaction

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Hybrid systems in which molecule-based active species are combined with nanoscale materials may offer valuable routes to enhance catalytic performances for electrocatalytic reactions. The development of rationally designed, cost-effective, efficient catalysts for the oxygen reduction reaction (ORR) is a crucial challenge for applications in fuel cells and metal-air batteries. A new hybrid ORR catalyst has been synthesized through a well-defined reaction between Co-based organometallic molecules and N-doped multiwalled carbon nanotubes (MWCNTs) at room temperature. The hybrid ORR catalyst shows excellent catalytic performance with an onset potential of 0.95V [vs. the reversible hydrogen electrode (RHE)], superior durability, and good methanol tolerance. Chemical and structural characterization after many reaction cycles reveals that the Co-based organometallic species maintained the original structure of cobalt(II) acetylacetonate with coordination to the heteroatoms of the MWCNTs. A thorough electrochemical investigation indicates that the major catalytically active site is Co-O-4-N-CNT.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2017-09
Language
English
Article Type
Article
Keywords

NITROGEN-DOPED CARBON; HIGH-PERFORMANCE ELECTROCATALYSTS; NONPRECIOUS METAL CATALYST; MEMBRANE FUEL-CELLS; COORDINATION CHEMISTRY; SUPPORTED PLATINUM; ORGANIC FRAMEWORK; FE-N/C; GRAPHENE; ORR

Citation

CHEMSUSCHEM, v.10, no.17, pp.3473 - 3481

ISSN
1864-5631
DOI
10.1002/cssc.201701038
URI
http://hdl.handle.net/10203/226288
Appears in Collection
MS-Journal Papers(저널논문)
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