Journal
CHEMISTRY OF MATERIALS
Volume 23, Issue 17, Pages 3987-3992Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm201542m
Keywords
graphite; graphene; edge-functionalization; nitrogen-doped graphene; electrocatalytic activity
Funding
- WCU (World Class University)
- U.S. Korea NBIT
- Basic Research Laboratory (BRL) through National Research Foundation (NRF) of Korea
- Ministry of Education, Science and Technology (MEST)
- U.S. Air Force Office of Scientific Research through Asian Office of Aerospace RD (AFOSR-AOARD)
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Pristine graphite is edge-selectively functionalized with 4-aminobenzoic acid by a direct Friedel Crafts acylation reaction in a polyphosphoric acid/phosphorus pentoxide medium to produce 4-aminobenzoyl edge-functionalized graphite (EFG). The EFG is readily dispersible in N-methyl-2-pyrrolidone (NMP). Subsequent solution casting leads to the formation of large-area graphene film on a silicon wafer. The film shows sheet resistances of 60 and 200 Omega/sq, respectively, before and after heat treatment at 900 degrees C in an argon atmosphere. Upon the heat treatment, the EFG film becomes a N-doped graphene (N-graphene) film to display outstanding electrocatalytic activity for oxygen reduction reaction (ORR).
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