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The reduction of carbonyl compounds at carbon electrodes in acidic water/methanol mixtures

Record type: Article

The voltammetry of benzaldehyde in acidic methanol/water mixtures is shown to depend strongly on the cathode material. At pH 1, benzaldehyde always reduces in two 1e(-) steps and the first step is always reversible. On the other hand, the potential for the second reduction step varies strongly with cathode material; at vitreous carbon, the second step occurs at much more negative potential than at lead or mercury, giving much better resolution of the two reduction waves. In citrate buffer, pH 4, the first reduction step is shifted negative; as a result, at lead a single 2e(-) wave is seen but at vitreous carbon, two 1e(-) steps are still observed. These changes in voltammetry with cathode material are shown to be general for both aldehydes and ketones.

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Citation

Libot, C. and Pletcher, D. (2000) The reduction of carbonyl compounds at carbon electrodes in acidic water/methanol mixtures Electrochemistry Communications, 2, (3), pp. 141-144. (doi:10.1016/S1388-2481(99)00157-5).

More information

Published date: 1 March 2000
Keywords: benzaldehyde, reduction, carbon cathodes, rotating disc electrode voltammetryaromatic-aldehydes, flow cell, electrosyntheses

Identifiers

Local EPrints ID: 18924
URI: http://eprints.soton.ac.uk/id/eprint/18924
ISSN: 1388-2481
PURE UUID: ec474cff-6b8c-4acc-b928-348fcebbe87c

Catalogue record

Date deposited: 19 Jan 2006
Last modified: 17 Jul 2017 16:34

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Contributors

Author: C. Libot
Author: D. Pletcher

University divisions


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