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Kim, Kyoung Taek
KT Kim Group at UNIST
Research Interests
  • Polymer Chemistry

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Carbon nanotubes/heteroatom-doped carbon core-sheath nanostructures as highly active, metal-free oxygen reduction electrocatalysts for alkaline fuel cells

Cited 2 times inthomson ciCited 2 times inthomson ci
Title
Carbon nanotubes/heteroatom-doped carbon core-sheath nanostructures as highly active, metal-free oxygen reduction electrocatalysts for alkaline fuel cells
Author
Sa, Young JinPark, ChiyoungJeong, Hu YoungPark, Seok-HeeLee, ZonghoonKim, Kyoung TaekPark, Gu-GonJoo, Sang Hoon
Keywords
carbon nanotubes; electrocatalysts; fuel cells; ionic liquids; oxygen reduction
Issue Date
201404
Publisher
WILEY-V C H VERLAG GMBH
Citation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.53, no.16, pp.4102 - 4106
Abstract
A facile, scalable route to new nanocomposites that are based on carbon nanotubes/heteroatom-doped carbon (CNT/HDC) core-sheath nanostructures is reported. These nanostructures were prepared by the adsorption of heteroatom-containing ionic liquids on the walls of CNTs, followed by carbonization. The design of the CNT/HDC composite allows for combining the electrical conductivity of the CNTs with the catalytic activity of the heteroatom-containing HDC sheath layers. The CNT/HDC nanostructures are highly active electrocatalysts for the oxygen reduction reaction and displayed one of the best performances among heteroatom-doped nanocarbon catalysts in terms of half-wave potential and kinetic current density. The four-electron selectivity and the exchange current density of the CNT/HDC nanostructures are comparable with those of a Pt/C catalyst, and the CNT/HDC composites were superior to Pt/C in terms of long-term durability and poison tolerance. Furthermore, an alkaline fuel cell that employs a CNT/HDC nanostructure as the cathode catalyst shows very high current and power densities, which sheds light on the practical applicability of these new nanocomposites. A facile, scalable route for the synthesis of new nanocomposites that are based on carbon nanotubes/heteroatom- doped carbon (CNT/HDC) core-sheath nanostructures has been developed. The CNT/HDC nanostructures exhibit excellent electrocatalytic activity, kinetics, and durability for the oxygen reduction reaction, and they also performed well as the cathode catalysts in alkaline fuel cells.
URI
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DOI
http://dx.doi.org/10.1002/anie.201307203
ISSN
1433-7851
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SNS_Journal Papers
UCRF_Journal Papers
MSE_Journal Papers
ECHE_Journal Papers

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