RRDE experiments with independent potential scans at the ring and disk electrodes — 3D map of intermediates and products of electrode processes

The dual cyclic voltammetry technique and the electrochemical measuring system with rotating gold disk-gold ring electrodes have been tested in air-saturated and deaerated aqueous sulfuric acid solutions (selected as model systems). The oxygen reduction process has been chosen as model reaction. A n...

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Bibliographic Details
Published in:Electrochemistry communications 2012-06, Vol.19, p.1-4
Main Authors: Vesztergom, S., Ujvári, M., Láng, G.G.
Format: Article
Language:English
Subjects:
3D map
Chemistry
Dual cyclic voltammetry
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Other electrodes
Oxygen reduction
Rotating ring-disk electrode
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Summary:The dual cyclic voltammetry technique and the electrochemical measuring system with rotating gold disk-gold ring electrodes have been tested in air-saturated and deaerated aqueous sulfuric acid solutions (selected as model systems). The oxygen reduction process has been chosen as model reaction. A new 3D representation of the data has been proposed which can be used to reveal the formation of electroactive species (intermediates or products) at the disk. ► Study of a rotating gold disk-gold ring system in air-saturated and deaerated sulfuric acid solutions. ► Measuring system for recording voltammograms simultaneously at the disk and the ring. ► 3D maps have been constructed. ► The hydrogen peroxide formed at the disk could be effectively detected at sufficiently positive ring potentials.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2012.03.006