Journal
SCIENTIFIC REPORTS
Volume 3, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep01810
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Funding
- World Class University (WCU)
- US-Korea NBIT
- Mid-Career Researcher (MCR)
- Converging Research Center (CRC)
- Basic Research Laboratory (BRL) programs through the National Research Foundation (NRF) of Korea
- Ministry of Education, Science and Technology (MEST)
- US Air Force Office of Scientific Research through Asian Office of Aerospace RD (AFOSR-AOARD)
- AFOSR [FA9550-12-1-0037, FA-9550-12-1-0069]
- National Research Foundation of Korea [2010-0019408, 2010-00301, 2012R1A2A2A01045911] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.
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