BROWSE

Related Researcher

Author's Photo

Kim, Byeong-Su
Soft and Hybrid Nanomaterials Lab
Research Interests
  • Carbon materials, polymer, Layer-by-Layer (LbL) assembly, hyperbranched polymer, polyglycerol (PG), bio-applications

ITEM VIEW & DOWNLOAD

Mussel-inspired nitrogen-doped graphene nanosheet supported manganese oxide nanowires as highly efficient electrocatalysts for oxygen reduction reaction

Cited 1 times inthomson ciCited 0 times inthomson ci
Title
Mussel-inspired nitrogen-doped graphene nanosheet supported manganese oxide nanowires as highly efficient electrocatalysts for oxygen reduction reaction
Author
Lee, TaeminJeon, Eun KyungKim, Byeong-Su
Keywords
METAL-FREE ELECTROCATALYSTS; AIR BATTERIES; NANOSTRUCTURED MATERIALS; ENERGY-CONVERSION; CARBON NANOTUBES; STORAGE DEVICES; FUEL-CELLS; CATALYSTS; PERFORMANCE; SUPERCAPACITORS
Issue Date
2014-05
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.2, no.17, pp.6167 - 6173
Abstract
Electrocatalysts for oxygen reduction reaction (ORR) play a vital role in determining the performance of fuel cells and metal–air batteries. Carbon nanomaterials doped with heteroatoms are highly attractive by virtue of their excellent electrocatalytic activity, high conductivity and large surface area. This study reports the synthesis of a highly efficient electrocatalyst based on nitrogen-doped (N-doped) graphene nanosheets (NG) using mussel-inspired dopamine as a nitrogen source. Dopamine undergoes oxidative polymerization that can functionalize the surface of graphene and also introduces nitrogen atoms onto the graphene nanosheets upon pyrolysis. N-doping not only leads to improved catalytic activity, but it also provides anchoring sites for the growth of electroactive amorphous manganese oxide nanowires on the graphene nanosheets (NG/MnOx). On the basis of a Koutecky–Levich plot, it is found that the hybrid NG/MnOx catalyst exhibits excellent catalytic activity with a direct four-electron pathway in ORR. Furthermore, the hybrid electrocatalyst possesses superior stability and gives a low yield of peroxide compared to commercial Pt/C catalysts. This suggests that the unique combination of an N-doped graphene support and amorphous MnOx nanowires can synergistically improve the catalytic activity for ORR.
URI
Go to Link
DOI
10.1039/C3TA14147K
ISSN
2050-7488
Appears in Collections:
SNS_Journal Papers
Files in This Item:
000333580700027.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU