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Microstructural and electrochemical properties of vertically aligned few layered graphene (FLG) nanoflakes and their application in methanol oxidation

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Soin, N, Roy, SS, Lim, TH and McLaughlin, JAD (2011) Microstructural and electrochemical properties of vertically aligned few layered graphene (FLG) nanoflakes and their application in methanol oxidation. Materials Chemistry and Physics, 129 (3). pp. 1051-1057. [Journal article]

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URL: http://dx.doi.org/10.1016/j.matchemphys.2011.05.063

DOI: doi:10.1016/j.matchemphys.2011.05.063

Abstract

Vertically aligned few layered graphene (FLG) nanoflakes were synthesised on silicon substrates by microwave plasma enhanced chemical vapour deposition (MPECVD) method. Transmission electron microscopy (TEM) shows that the structures have highly graphitized terminal planes of 1–3 layers of graphene. Raman spectroscopy revealed a narrow G band with a FWHM of 23 cm−1 accompanied by a strong G′ (2D) band, with a FWHM of 43 cm−1 and an IG/IG′ ratio of 1, which are all the characteristics of highly crystallized few layered graphene. The FLG electrodes demonstrate fast electron transfer (ET) kinetics for Fe(CN)63−/4− redox system with an electron transfer rate, ΔEp, of 60 mV. Platinum (Pt) nanoparticles of 6 nm diameter were deposited on as grown FLGs using magnetron DC sputtering for methanol oxidation studies. When used as electrodes for methanol oxidation, a mass specific peak current density of 62 mA mg−1 cm−2 of Pt is obtained with a high resistance to carbon monoxide (CO) poisoning as evident by a high value of 2.2 for the ratio of forward to backward anodic peak currents

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:18888
Deposited By:Mrs Ann Blair
Deposited On:19 Jul 2011 09:21
Last Modified:30 Sep 2013 15:24

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