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The anodic behaviour of Ebonex (R) in oxalic acid solutions

Lookup NU author(s): Emeritus Professor Keith Scott, Dr Hua Cheng

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Abstract

A study of the oxidation of aqueous solutions of oxalic acid in various supporting electrolytes, at an Ebonex(R) anode is reported. From data obtained by cyclic voltammetry, linear sweep voltammetry, chronopotentiometry, controlled potential coulometry and gas chramatography it has been shown that oxalic acid oxidation at an Ebonex(R) anode, does not proceed, to any significant extent. Data collected using different electrolytes showed that sulphuric acid supported higher current densities at similar electrode potentials. Ebonex(R) is essentially a selective oxygen evolver and is thus a suitable anode for the electroreduction of oxalic acid to glyoxylic acid in an undivided cell. The behaviour of a platinized titanium anode is also reported and this material has similar electrochemical characteristics to Ebonex(R) in aqueous oxalic acid solutions.

Publication metadata

Author(s): Scott K; Cheng H

Publication type: Article

Publication status: Published

Journal: Journal of Applied Electrochemistry

Year: 2002

Volume: 32

Issue: 6

Pages: 583-589

ISSN (print): 0021-891X

ISSN (electronic): 1572-8838

Publisher: Springer

URL: http://dx.doi.org/10.1023/A:1020107631326

DOI: 10.1023/A:1020107631326

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