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Park, Noejung
Computational Physics & Electronic Structure Lab.
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Direct nitrogen fixation at the edges of graphene nanoplatelets as efficient electrocatalysts for energy conversion

Author(s)
Jeon, In-YupChoi, Hyun-JungJu, Myung JongChoi, In TaekLim, KiminKo, JaejungKim, Hwan KyuKim, Jae CheonLee, Jae-JoonShin, DongbinJung, Sun-MinSeo, Jeong-MinKim, Min-JungPark, NoejungDai, LimingBaek, Jong-Beom
Issued Date
2013-07
DOI
10.1038/srep02260
URI
https://scholarworks.unist.ac.kr/handle/201301/7356
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84880785891
Citation
SCIENTIFIC REPORTS, v.3, pp.2260
Abstract
Nitrogen fixation is essential for the synthesis of many important chemicals (e.g., fertilizers, explosives) and basic building blocks for all forms of life (e.g., nucleotides for DNA and RNA, amino acids for proteins). However, direct nitrogen fixation is challenging as nitrogen (N2) does not easily react with other chemicals. By dry ball-milling graphite with N2, we have discovered a simple, but versatile, scalable and eco-friendly, approach to direct fixation of N2 at the edges of graphene nanoplatelets (GnPs). The mechanochemical cracking of graphitic C-C bonds generated active carbon species that react directly with N2 to form five- and six-membered aromatic rings at the broken edges, leading to solution-processable edge-nitrogenated graphene nanoplatelets (NGnPs) with superb catalytic performance in both dye-sensitized solar cells and fuel cells to replace conventional Pt-based catalysts for energy conversion.
Publisher
NATURE PUBLISHING GROUP
ISSN
2045-2322
Keyword
SENSITIZED SOLAR-CELLSCOUNTER ELECTRODEFUNCTIONALIZED GRAPHENEOXYGEN REDUCTIONCARBONPERFORMANCEFILMSOXIDENANOSHEETSGRAPHITE

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