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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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Forming indium-carbon (In-C) bonds at the edges of graphitic nanoplatelets

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Title
Forming indium-carbon (In-C) bonds at the edges of graphitic nanoplatelets
Author
Jeon, I-YKim, S-WShin, S-HJung, S-MBaek, Jong-Beom
Issue Date
2020-06
Publisher
ELSEVIER
Citation
MATERIALS TODAY ADVANCES, v.6
Abstract
Indium (In), one of the soft and malleable post-transition metals, was introduced along the broken edges of graphitic nanoplatelets (GnPs) by mechanochemically ball-milling graphite in the presence of solid state In beads. After completely leaching off unreacted In using royal water (aqua regia), the formation of In-C bonds in the resulting In-doped graphitic nanoplatelets (InGnPs) was confirmed using various analytical techniques, including atomic-resolution transmission electron microscopy (AR-TEM). Scanning TEM (STEM) image shows that In elements instead of In clusters were uniformly distributed in the InGnPs, suggesting the formation of In-C bonds. The content of In in the InGnPs was 0.34 at% (3.01 wt%), as determined by X-ray photoelectron spectroscopy (XPS). The mechanochemically induced chemical reaction was powerful enough to form In-C bonds. Further, the InGnPs demonstrated catalytic activity toward the oxygen reduction reaction (ORR) comparable to commercial Pt/C catalysts, as well as excellent durability and tolerance against impurities (methanol and CO) in alkaline medium.
URI
https://scholarworks.unist.ac.kr/handle/201301/52868
URL
https://www.sciencedirect.com/science/article/pii/S2590049819301043
DOI
10.1016/j.mtadv.2019.100030
ISSN
2590-0498
Appears in Collections:
ECHE_Journal Papers
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