期刊
SYNTHETIC METALS
卷 160, 期 21-22, 页码 2355-2360出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2010.09.011
关键词
Graphene; Polypyrrole; Silver nanoparticles; Electrochemical properties
资金
- IT Industrial Source Technology Development Business of the Ministry of Knowledge Economy, Korea
- Korea Evaluation Institute of Industrial Technology (KEIT) [KI002177] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this work, silver (Ag) nanoparticles were deposited on graphene sheets by chemical reduction and Ag-doped graphene (Ag-GR)/polypyrrole(PPy) nanocomposites were prepared by oxidation polymerization. The effect of the Ag-GR incorporation on the electrochemical properties of the PPy nanocomposites was investigated. It was found that highly dispersed Ag nanoparticles (2-5 nm) could be deposited onto the GR and that Ag-GR was successfully coated by PPy. From the cyclic voltammograms. Ag-GR showed higher electrocatalytic activity than that of pristine GR. Furthermore, the Ag-GR/PPy showed remarkably increased current density, quicker response, and better specific capacitance compared with GR/PPy. This indicates that, due to their high electrocatalytic activity, the Ag nanoparticles deposited onto the GR serve as an efficiency catalyst to improve electrochemical performance of the GR/PPy and that they resulted in the increase of the charge transfer between GR and PPy by bridge effect. (C) 2010 Elsevier B.V. All rights reserved.
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