The University of Southampton
University of Southampton Institutional Repository

Electrochemical studies of decamethylferrocene in supercritical carbon dioxide mixtures

Electrochemical studies of decamethylferrocene in supercritical carbon dioxide mixtures
Electrochemical studies of decamethylferrocene in supercritical carbon dioxide mixtures
Detailed analysis of the voltammetry of decamethylferrocene at micro and macrodisc electrodes has been carried out in scCO2/MeCN (15 wt%), 20 mM [NBun4][BF4] and 309 K and 17.5 MPa. A passivating film needs to be removed from platinum electrodes before stable, reproducible voltammetry can be obtained. At low concentrations (0.22 mM) reversible 1e? behaviour is observed. Significant effects from natural convection are also present and it is demonstrated that fitting a baffle to the electrode dampens this effect. Limiting currents at microdisc electrodes at concentrations ranging from 0.22 to 11 mM and radii of 10 to 25 ?m all obey the microdisc equation. The diffusion coefficient is calculated to be 4.06 × 10?5 cm2 s?1 in scCO2/MeCN (15 wt%) with 20 mM [NBun4][BF4] and 309 K at 17.5 MPa. The solubility of decamethylferrocene is in excess of 11 mM for these conditions.
1463-9076
261-267
Branch, Jack A.
742797a7-a590-4bdd-b8f2-7310f0f58181
Cook, David A.
0fca0ffb-eef4-422f-b513-ce9a1f7de7cc
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Branch, Jack A.
742797a7-a590-4bdd-b8f2-7310f0f58181
Cook, David A.
0fca0ffb-eef4-422f-b513-ce9a1f7de7cc
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075

Branch, Jack A., Cook, David A. and Bartlett, Philip N. (2015) Electrochemical studies of decamethylferrocene in supercritical carbon dioxide mixtures. Physical Chemistry Chemical Physics, 17 (1), 261-267. (doi:10.1039/C4CP04545A).

Record type: Article

Abstract

Detailed analysis of the voltammetry of decamethylferrocene at micro and macrodisc electrodes has been carried out in scCO2/MeCN (15 wt%), 20 mM [NBun4][BF4] and 309 K and 17.5 MPa. A passivating film needs to be removed from platinum electrodes before stable, reproducible voltammetry can be obtained. At low concentrations (0.22 mM) reversible 1e? behaviour is observed. Significant effects from natural convection are also present and it is demonstrated that fitting a baffle to the electrode dampens this effect. Limiting currents at microdisc electrodes at concentrations ranging from 0.22 to 11 mM and radii of 10 to 25 ?m all obey the microdisc equation. The diffusion coefficient is calculated to be 4.06 × 10?5 cm2 s?1 in scCO2/MeCN (15 wt%) with 20 mM [NBun4][BF4] and 309 K at 17.5 MPa. The solubility of decamethylferrocene is in excess of 11 mM for these conditions.

Text
286.pdf - Version of Record
Restricted to Repository staff only
Request a copy

More information

Accepted/In Press date: 7 November 2014
e-pub ahead of print date: 12 November 2014
Published date: 7 January 2015
Organisations: Electrochemistry

Identifiers

Local EPrints ID: 376459
URI: https://eprints.soton.ac.uk/id/eprint/376459
ISSN: 1463-9076
PURE UUID: cd6e39dc-5c3d-4956-9a03-e1d4926d8e8d
ORCID for Philip N. Bartlett: ORCID iD orcid.org/0000-0002-7300-6900

Catalogue record

Date deposited: 28 Apr 2015 14:11
Last modified: 31 Jul 2018 00:36

Export record

Altmetrics

Contributors

Author: Jack A. Branch
Author: David A. Cook

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×