Direct electro-deposition of graphene from aqueous suspensions

Hilder, Matthias, Winther-Jensen, Bjorn, Li, Dan, Forsyth, Maria and MacFarlane, Douglas R. 2011, Direct electro-deposition of graphene from aqueous suspensions, Physical chemistry chemical physics, vol. 13, no. 20, pp. 9187-9193.

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Title Direct electro-deposition of graphene from aqueous suspensions
Author(s) Hilder, Matthias
Winther-Jensen, Bjorn
Li, Dan
Forsyth, Maria
MacFarlane, Douglas R.
Journal name Physical chemistry chemical physics
Volume number 13
Issue number 20
Start page 9187
End page 9193
Total pages 7
Publisher Royal Society of Chemistry
Place of publication Cambridge, U. K.
Publication date 2011
ISSN 1463-9076
1463-9084
Summary We describe the direct electro-chemical reduction of graphene oxide to graphene from aqueous suspension by applying reduction voltages exceeding -1.0 to -1.2 V. The conductivity of the deposition medium is of crucial importance and only values between 4-25 mS cm-1 result in deposition. Above 25 mS cm-1 the suspension de-stabilises while conductivities below 4 mS cm-1 do not show a measurable deposition rate. Furthermore, we show that deposition can be carried out over a wide pH region ranging from 1.5 to 12.5. The electro-deposition process is characterised in terms of electro-chemical methods including cyclic voltammetry, quartz crystal microbalance, impedance spectroscopy, constant amperometry and potentiometric titrations, while the deposits are analysed via Raman spectroscopy, infra-red spectroscopy, X-ray photoelectron spectroscopy and X-ray diffractometry. The determined oxygen contents are similar to those of chemically reduced graphene oxide, and the conductivity of the deposits was found to be ~20 S cm -1.
Language eng
Field of Research 030699 Physical Chemistry not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2011, The Owner Societies
Persistent URL http://hdl.handle.net/10536/DRO/DU:30040351

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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