BROWSE

Related Researcher

Author's Photo

Lah, Myoung Soo
Nanoporous Materials Lab
Research Interests
  • Metal-Organic Frameworks (MOFs)
  • Crystal Engineering
  • Supramolecular coordination chemistry

ITEM VIEW & DOWNLOAD

Graphite oxide as an efficient and robust support for Pt nanoparticles in electrocatalytic methanol oxidation

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Graphite oxide as an efficient and robust support for Pt nanoparticles in electrocatalytic methanol oxidation
Author
Prabakar, S.J. RichardKim, YusinJeong, JaehyangJeong, SeokLah, Myoung SooPyo, Myoungho
Issue Date
2016-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v.188, pp.472 - 479
Abstract
Pt nanoparticles were encapsulated in graphite oxide (GTO) and used as electrocatalysts for methanol oxidation. When compared with Pt nanoparticles composited with graphene oxide (GO/Pt), Pt nanoparticles sandwiched between the graphene layers of a GTO framework (GTO/Pt) showed significantly improved electrocatalytic performance and stability for methanol oxidation. The simultaneous reduction of Pt4+ and oxygen moieties of GTO during the synthesis of GTO/Pt resulted in a composite with moderately stacked graphene layers. This structure enhanced the kinetic feasibility of methanol oxidation with no decrease in the active surface area of Pt nanoparticles, and also increased the tolerance for the adsorption of surface-adsorbed intermediates. In addition, in contrast to the GO/Pt composite, the Pt nanoparticles in GTO/Pt did not aggregate during the electrochemical reaction, which was responsible for the superior long-term stability of the GTO/Pt. Thermal reduction of GTO/Pt (rGTO/Pt) resulted in rather inferior electrocatalytic responses due to a decrease in the accessible surface area of Pt nanoparticles in the densely stacked graphene layers. Therefore, other than a synthetic convenience (GTO does not require a mechanical exfoliation step.), this work suggests that the use of GTO rather than GO as a support could be a more efficient tactic in preparing graphene composites when the electrochemical reaction on the surface of impregnated nanoparticles is important.
URI
https://scholarworks.unist.ac.kr/handle/201301/18011
URL
http://www.sciencedirect.com/science/article/pii/S0013468615309695
DOI
10.1016/j.electacta.2015.12.051
ISSN
0013-4686
Appears in Collections:
PHY_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

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

MENU