Lounasvuori, MM;
Rosillo-Lopez, M;
Salzmann, CG;
Caruana, DJ;
Holt, KB;
(2015)
The influence of acidic edge groups on the electrochemical performance of graphene nanoflakes.
Journal of Electroanalytcal Chemistry
, 753
pp. 28-34.
10.1016/j.jelechem.2015.05.010.
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Abstract
Graphene nanoflakes (GNF) with lateral dimensions of ca. 30 nm and edge-terminated with carboxylic acid functionalities have been characterised and the influence of acidic functionalities on the [Fe(CN)6]3−/4− redox couple studied using cyclic voltammetry and spectroelectrochemical methods. The presence of the COOH-terminated GNF in solution as well as immobilised onto an electrode surface was found to inhibit the redox reaction, supporting the conclusion that GNF promote instability of [Fe(CN)6]3−/4− in solution. The redox reaction was also much less influenced by the presence of GNF in D2O, highlighting the role played by readily available protons in destabilising the [Fe(CN)6]3−/4− redox couple. In the presence of GNF in solution, an additional, very intense cyanide stretch IR band was observed that was attributed to the formation of a new, non-soluble species. When D2O was used as the solvent, the IR spectrum showed no evidence of a new cyano species.
| Type: | Article |
|---|---|
| Title: | The influence of acidic edge groups on the electrochemical performance of graphene nanoflakes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jelechem.2015.05.010 |
| Publisher version: | http://dx.doi.org/10.1016/j.jelechem.2015.05.010 |
| Additional information: | © 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Graphene, [Fe(CN)(6)](3-/4-), Oxygen-containing functionalities, pH, Isotope effect, Cyclic voltammetry, Spectroelectrochemistry, ATR-FTIR spectroscopy, Modified electrodes |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1476945 |
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