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Issue 3, 2013
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Steady-state macroscale voltammetry in a supercritical carbon dioxide medium

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Abstract

The electrochemical oxidation and reduction of decamethylferrocene is demonstrated in supercritical carbon dioxide at a macro gold disc electrode at 100 bar and 313 K. Fast mass transport effects were exhibited and the corresponding steady-state voltammetry was observed at high scan rates. A highly lipophilic room temperature ionic liquid that readily dissolved in supercritical CO2 with acetonitrile as a co-solvent was used as an electrolyte, allowing for a conducting supercritical single phase. Experimental observations along with simulation results confirmed the hypothesis that a thin layer of liquid-like phase of co-solvent is formed at the electrode surface and is restricted by a more supercritical phase of high natural convection and bulk concentration.

Graphical abstract: Steady-state macroscale voltammetry in a supercritical carbon dioxide medium

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Supplementary files

Article information


Submitted
15 Aug 2012
Accepted
24 Oct 2012
First published
25 Oct 2012

Phys. Chem. Chem. Phys., 2013,15, 972-978
Article type
Paper

Steady-state macroscale voltammetry in a supercritical carbon dioxide medium

K. E. Toghill, P. Voyame, D. Momotenko, A. J. Olaya and H. H. Girault, Phys. Chem. Chem. Phys., 2013, 15, 972
DOI: 10.1039/C2CP42856C

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