Steady-state macroscale voltammetry in a supercritical carbon dioxide medium

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.


Published in:
Physical Chemistry Chemical Physics, 15, 3, 972
Year:
2013
Publisher:
Cambridge, Royal Soc Chemistry
ISSN:
1463-9084
Laboratories:




 Record created 2013-01-31, last modified 2018-03-17

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