File Download

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

정후영

Jeong, Hu Young
UCRF Electron Microscopy group
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Antimony-doped graphene nanoplatelets

Author(s)
Jeon, In-YupChoi, MinChoi, Hyun-JungJung, Sun-MinKim, Min-JungSeo, Jeong-MinBae, Seo-YoonYoo, SeonyoungKim, GuntaeJeong, Hu YoungPark, NoejungBaek, Jong-Beom
Issued Date
2015-05
DOI
10.1038/ncomms8123
URI
https://scholarworks.unist.ac.kr/handle/201301/11681
Fulltext
http://www.nature.com/ncomms/2015/150522/ncomms8123/full/ncomms8123.html
Citation
NATURE COMMUNICATIONS, v.6, pp.7123
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
Publisher
NATURE PUBLISHING GROUP
ISSN
2041-1723
Keyword
OXYGEN REDUCTION REACTIONRAY PHOTOELECTRON-SPECTROSCOPYHIGH ELECTROCATALYTIC ACTIVITYMETAL-FREE ELECTROCATALYSTSCARBONGRAPHITEOXIDENANOPARTICLESPLATINUMCATALYST

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.