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Park, Jongnam
Materials and Chemistry Lab.
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Graphene Multilayer Supported Gold Nanoparticles for Efficient Electrocatalysts Toward Methanol Oxidation

Author(s)
Choi, YuriGu, MinsuPark, JongnamSong, Hyun-KonKim, Byeong-Su
Issued Date
2012-12
DOI
10.1002/aenm.201200214
URI
https://scholarworks.unist.ac.kr/handle/201301/3170
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84872315486
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.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
1614-6832
Keyword (Author)
graphenegold nanoparticlelayer-by-layer assemblymethanol oxidationfuel cell
Keyword
OXYGEN REDUCTION REACTIONFUEL-CELLSELECTROCHEMICAL IMPEDANCEAU NANOPARTICLESCATHODE CATALYSTHOLLOW CAPSULESAQUEOUS-MEDIAOXIDECARBONSURFACE

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