eprintid: 1476945
rev_number: 26
eprint_status: archive
userid: 608
dir: disk0/01/47/69/45
datestamp: 2016-03-22 13:34:17
lastmod: 2021-10-04 01:39:05
status_changed: 2016-03-22 13:34:17
type: article
metadata_visibility: show
creators_name: Lounasvuori, MM
creators_name: Rosillo-Lopez, M
creators_name: Salzmann, CG
creators_name: Caruana, DJ
creators_name: Holt, KB
title: The influence of acidic edge groups on the electrochemical performance of graphene nanoflakes
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F56
keywords: Graphene, [Fe(CN)(6)](3-/4-), Oxygen-containing functionalities, pH, Isotope effect, Cyclic voltammetry, Spectroelectrochemistry, ATR-FTIR spectroscopy, Modified electrodes
note: © 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/).
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.
date: 2015-09-15
date_type: published
official_url: http://dx.doi.org/10.1016/j.jelechem.2015.05.010
oa_status: green
full_text_type: pub
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1058227
doi: 10.1016/j.jelechem.2015.05.010
lyricists_name: Caruana, Daren
lyricists_name: Holt, Katherine
lyricists_name: Rosillo-Lopez, Martin
lyricists_name: Salzmann, Christoph
lyricists_id: DJCAR76
lyricists_id: KHOLT76
lyricists_id: MROSI87
lyricists_id: CGSAL86
actors_name: Poirier, Elizabeth
actors_id: EPPOI23
actors_role: owner
full_text_status: public
publication: Journal of Electroanalytcal Chemistry
volume: 753
pagerange: 28-34
issn: 1572-6657
citation:        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 <https://doi.org/10.1016/j.jelechem.2015.05.010>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1476945/1/1-s2.0-S1572665715002313-main.pdf