Antimony-doped graphene nanoplatelets

In-Yup Jeon, Min Choi, Hyun-Jung Choi, Sun-Min Jung, Min-Jung Kim, Jeong-Min Seo, Seo-Yoon Bae, Seonyoung Yoo, Guntae Kim, Hu Young Jeong (), Noejung Park () and Jong-Beom Baek ()
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In-Yup Jeon: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Min Choi: School of Natural Science/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Hyun-Jung Choi: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Sun-Min Jung: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Min-Jung Kim: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Jeong-Min Seo: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Seo-Yoon Bae: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Seonyoung Yoo: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Guntae Kim: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Hu Young Jeong: UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST)
Noejung Park: School of Natural Science/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)
Jong-Beom Baek: School of Energy and Chemical Engineering/Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST)

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Heteroatom doping into the graphitic frameworks have been intensively studied for the development of metal-free electrocatalysts. However, the choice of heteroatoms is limited to non-metallic elements and heteroatom-doped graphitic materials do not satisfy commercial demands in terms of cost and stability. Here we realize doping semimetal antimony (Sb) at the edges of graphene nanoplatelets (GnPs) via a simple mechanochemical reaction between pristine graphite and solid Sb. The covalent bonding of the metalloid Sb with the graphitic carbon is visualized using atomic-resolution transmission electron microscopy. The Sb-doped GnPs display zero loss of electrocatalytic activity for oxygen reduction reaction even after 100,000 cycles. Density functional theory calculations indicate that the multiple oxidation states (Sb3+ and Sb5+) of Sb are responsible for the unusual electrochemical stability. Sb-doped GnPs may provide new insights and practical methods for designing stable carbon-based electrocatalysts.

Date: 2015
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DOI: 10.1038/ncomms8123

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