Direct electro-deposition of graphene from aqueous suspensions

Matthias Hilder*, Bjorn Winther Jensen, Dan Li, Maria Forsyth, Douglas R. MacFarlane

*この研究の対応する著者

研究成果: Article査読

182 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)9187-9193
ページ数7
ジャーナルPhysical Chemistry Chemical Physics
13
20
DOI
出版ステータスPublished - 2011 5月 28
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 物理学および天文学(全般)

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