Rotating Ring-Disk Study of the Cu(II)/Cu(O) System on a Gold Electrode in Sulphuric Acid Solution

✍ Scribed by J. Vandenbruwaene; P. Kiekens; E. Temmerman

• Publisher: Wiley (John Wiley & Sons)
• Year: 2010
• Weight: 348 KB
• Volume: 92
• Category: Article
• ISSN: 0037-9646
• DOI: 10.1002/bscb.19830921104

✦ Synopsis

The reduction and oxidation reactions of the Cu(II)/Cu(O) system have been studied with a rotating gold ring-disk electrode in 0.2 M sulphuric acid solutions.

Two reduction waves R1 and R2 are obtained. R1 is mainly attributed to the underpotential deposition of copper while R 2 is associated with the convective-diffusional formation of bulk copper metal.

Three oxidation (stripping) peaks 01, 02 and 03 are observed. 01 at most positive potentials, is thought to result from the oxidation of underpotential copper. The second stripping peak 02 may originate from the dissolution of copper atoms in direct contact with the underpotential copper, having slightly different properties with respect to the bulk copper atoms. Bulk copper is supposed to be oxidized in the third stripping peak, 03.