Precise tuning of surface composition and electron-transfer properties of graphene oxide films through electroreduction

Adriano Ambrosi, Martin Pumera

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Graphene materials are generally prepared from the exfoliation of graphite oxide (GO) to graphene oxide, followed by subsequent chemical or thermal reduction. These methods, although efficient in removing most of the oxygen functionalities from the GO material, lack control over the extent of the reduction process. We demonstrate here an electrochemical reduction procedure that not only allows for precise control of the reduction process to obtain a graphene material with a well-defined C/O ratio in the range of 3 to 10, but also one that is able to tune the electrocatalytic properties of the reduced material. A method that is able to precisely control the amount and density of the oxygen functionalities on the graphene material as well as its electrochemical behaviour is very important for several applications such as electronics, bio-composites and electrochemical devices. Film studies: Electrochemical reduction allows for precise tuning of the surface composition of graphene oxide films by altering the content of the oxygen functionalities (see figure). The electrochemical activity of graphene oxide modified electrodes can therefore be adjusted to specific levels according to the desired application.

Original languageEnglish
Pages (from-to)4748-4753
Number of pages6
JournalChemistry - A European Journal
Volume19
Issue number15
DOIs
Publication statusPublished - 2013 Apr 8

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

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