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Author

Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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Graphene Multilayer Supported Gold Nanoparticles for Efficient Electrocatalysts Toward Methanol Oxidation

Cited 4 times inthomson ciCited 4 times inthomson ci
Title
Graphene Multilayer Supported Gold Nanoparticles for Efficient Electrocatalysts Toward Methanol Oxidation
Author
Choi, YuriGu, MinsuPark, JongnamSong, Hyun-KonKim, Byeong-Su
Keywords
3-dimensional; Bi-layer; Catalytic surface area; Electroactive; Electrocatalytic; Electrocatalytic activity; Electronic conduction; Gold nanoparticle; Graphene multilayers; Graphene oxides; Layer-by-layer assemblies; Methanol Oxidation; Multi-layer thin film; SIMPLE method; Structural component; Supported gold; Tunable properties
Issue Date
201212
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED ENERGY MATERIALS, v.2, no.12, pp.1510 - 1518
Abstract
This study reports a simple method of integrating electroactive gold nanoparticles (Au NPs) with graphene oxide (GO) nanosheet support by layer-by-layer (LbL) assembly for the creation of 3-dimensional electrocatalytic thin films that are active toward methanol oxidation. This approach involves the alternating assembly of two oppositely charged suspensions of Au NPs with GO nanosheets based on electrostatic interactions. The GO nanosheets not only serve as structural components of the multilayer thin film, but also potentially improve the utilization and dispersion of Au NPs by taking advantages of the high catalytic surface area and the electronic conduction of graphene nanosheets. Furthermore, it is found that the electrocatalytic activity of the multilayer thin films of Au NPs with graphene nanosheet is highly tunable with respect to the number of bilayers and thermal treatment, benefiting from the advantageous features of LbL assembly. Because of the highly versatile and tunable properties of LbL assembled thin films coupled with electrocatalytic NPs, we anticipate that the general concept presented here will offer new types of electroactive catalysts for direct methanol fuel cells.
URI
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DOI
http://dx.doi.org/10.1002/aenm.201200214
ISSN
1614-6832
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