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Park, Noejung
Computational Physics & Electronic Structure Lab
Research Interests
  • Electronic structure calculation, computational physics, computational material science

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Facile, scalable synthesis of edge-halogenated graphene nanoplatelets as efficient metal-free eletrocatalysts for oxygen reduction reaction

Cited 27 times inthomson ciCited 18 times inthomson ci
Title
Facile, scalable synthesis of edge-halogenated graphene nanoplatelets as efficient metal-free eletrocatalysts for oxygen reduction reaction
Author
Jeon, In-YupChoi, Hyun-JungChoi, MinSeo, Jeong-MinJung, Sun-MinKim, Min-JungZhang, ShengZhang, LipengXia, ZhenhaiDai, LimingPark, NoejungBaek, Jong-Beom
Keywords
Electrocatalysis; Fuel cells; Synthesis and processing; Synthesis of graphene
Issue Date
201306
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.3, no., pp.1810 -
Abstract
A series of edge-selectively halogenated (X = Cl, Br, I) graphene nanoplatelets (XGnPs = ClGnP, BrGnP, IGnP) were prepared simply by ball-milling graphite in the presence of Cl-2, Br-2 and I-2, respectively. High BET surface areas of 471, 579 and 662 m(2)/g were observed for ClGnP, BrGnP and IGnP, respectively, indicating a significant extent of delamination during the ball-milling and subsequent workup processes. The newly-developed XGnPs can be well dispersed in various solvents, and hence are solution processable. Furthermore, XGnPs showed remarkable electrocatalytic activities toward oxygen reduction reaction (ORR) with a high selectivity, good tolerance to methanol crossover/CO poisoning effects, and excellent long-term cycle stability. First-principle density-functional calculations revealed that halogenated graphene edges could provide decent adsorption sites for oxygen molecules, in a good agreement with the experimental observations.
URI
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DOI
http://dx.doi.org/10.1038/srep01810
ISSN
2045-2322
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SNS_Journal Papers
ECHE_Journal Papers
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