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Author

Baek, Jong-Beom
Center for Dimension-Controllable Organic Frameworks
Research Interests
  • Covalent Organic Frameworks (COFs), Carbon Nanotubes(CNTs), graphene, Energy Conversion and Storage

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Edge-iodine/sulfonic acid-functionalized graphene nanoplatelets as efficient electrocatalysts for oxygen reduction reaction

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Title
Edge-iodine/sulfonic acid-functionalized graphene nanoplatelets as efficient electrocatalysts for oxygen reduction reaction
Author
Baek, Jong YeolJeon, In-YupBaek, Jong-Beom
Keywords
METAL-FREE ELECTROCATALYSTS; EXFOLIATED GRAPHITE OXIDE; DOPED GRAPHENE; CARBON; NANOSHEETS; STATE; XPS
Issue Date
201406
Publisher
ROYAL SOC CHEMISTRYROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.2, no.23, pp.8690 - 8695
Abstract
We report the synthesis of edge-iodine/sulfonic acid-functionalized, graphene nanoplatelets (ISGnPs) via two-step sequential ball-milling of graphite, and their use as electrocatalysts for oxygen reduction reaction (ORR) in fuel cells. Graphite is ball-milled in the presence of iodine to produce the edge-iodine functionalized GnP (IGnP) in the first step and the IGnP is subsequently ball-milled with sulfur trioxide to yield the ISGnP. The resultant ISGnP is highly dispersible in various polar solvents, allowing the fabrication of electrodes for ORR using solution processing. The capacitance and cycle stability of the ISGnP in an alkaline medium are superior to commercial Pt/C and its kinetic electron transfer number (n) is comparable to Pt/C.
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DOI
http://dx.doi.org/10.1039/c4ta00927d
ISSN
2050-7488
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