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Electroreduction of Chlorine Gas at Platinum Electrodes in Several Room Temperature Ionic Liquids: Evidence of Strong Adsorption on the Electrode Surface Revealed by Unusual Voltammetry in Which Currents Decrease with Increasing Voltage Scan Rates

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Authors
Huang, X.
Silvester, Debbie
Streeter, I.
Aldous, L.
Hardacre, C.
Compton, R.
Date
2008
Type
Journal Article

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Huang, X. and Silvester, D. and Streeter, I. and Aldous, L. and Hardacre, C. and Compton, R. 2008. Electroreduction of Chlorine Gas at Platinum Electrodes in Several Room Temperature Ionic Liquids: Evidence of Strong Adsorption on the Electrode Surface Revealed by Unusual Voltammetry in Which Currents Decrease with Increasing Voltage Scan Rates. Journal of Physical Chemistry C. 112 (49): pp. 19477-19483.
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Journal of Physical Chemistry C
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Abstract

Voltammetry is reported for chlorine, Cl2, dissolved in various room temperature ionic liquids using platinum microdisk electrodes. A single reductive voltammetric wave is seen and attributed to the two-electron reduction of chlorine to chloride. Studies of the effect of voltage scan rate reveal uniquely unusual behavior in which the magnitude of the currents decrease with increasing scan rates. A model for this is proposed and shown to indicate the presence of strongly adsorbed species in the electrode reaction mechanism, most likely chlorine atoms, Cl.