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Antimony-doped Graphene Nanoplatelets

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, Jong-Beom Baek

Nat Commun. 2015 May 22;6:7123.

PMID: 25997811

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 (Sb(3+) and Sb(5+)) 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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS71746	Graphene nanoplatelets			Price

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