TY  - JOUR
TI  - The influence of acidic edge groups on the electrochemical performance of graphene nanoflakes
EP  - 34
SP  - 28
AV  - public
VL  - 753
Y1  - 2015/09/15/
N1  - © 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/).
ID  - discovery1476945
N2  - 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.
SN  - 1572-6657
UR  - http://dx.doi.org/10.1016/j.jelechem.2015.05.010
JF  - Journal of Electroanalytcal Chemistry
KW  - Graphene
KW  -  [Fe(CN)(6)](3-/4-)
KW  -  Oxygen-containing functionalities
KW  -  pH
KW  -  Isotope effect
KW  -  Cyclic voltammetry
KW  -  Spectroelectrochemistry
KW  -  ATR-FTIR spectroscopy
KW  -  Modified electrodes
A1  - Lounasvuori, MM
A1  - Rosillo-Lopez, M
A1  - Salzmann, CG
A1  - Caruana, DJ
A1  - Holt, KB
ER  -