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Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

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Enhanced activity and stability of Pt catalysts on functionalized graphene sheets for electrocatalytic oxygen reduction

Cited 313 times inthomson ciCited 331 times inthomson ci
Title
Enhanced activity and stability of Pt catalysts on functionalized graphene sheets for electrocatalytic oxygen reduction
Other Titles
Enhanced activity and stability of Pt catalysts on functionalized graphene sheets for electrocatalytic oxygen reduction
Author
Kou, RongShao, YuyanWang, DonghaiEngelhard, Mark H.Kwak, JahunWang, JunViswanathan, Vilayanur V.Wang, ChongminLin, YueheWang, YongAksay, Ilhan A.Liu, Jun
Keywords
Functionalized graphene sheets; Fuel cell; Pt; Cathode durability
Issue Date
2009-05
Publisher
ELSEVIER SCIENCE INC
Citation
ELECTROCHEMISTRY COMMUNICATIONS, v.11, no.5, pp.954 - 957
Abstract
Electrocatalysis of oxygen reduction using Pt nanoparticles supported on functionalized graphene sheets (FGSs) was studied. FGSs were prepared by thermal expansion of graphite oxide. Pt nanoparticles with average diameter of 2 nm were uniformly loaded on FGSs by impregnation methods. Pt-FGS showed a higher electrochemical surface area and oxygen reduction activity with improved stability as compared with the commercial catalyst. Transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical characterization suggest that the improved performance of Pt-FGS can be attributed to smaller particle size and less aggregation of Pt nanoparticles on the functionalized graphene sheets. Published by Elsevier B.V
URI
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DOI
10.1016/j.elecom.2009.02.033
ISSN
1388-2481
Appears in Collections:
ECHE_Journal Papers
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