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The anodic behaviour of Ebonex® in oxalic acid solutions

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Abstract

A study of the oxidation of aqueous solutions of oxalic acid in various supporting electrolytes, at an Ebonex® 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® 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® 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® in aqueous oxalic acid solutions.

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Authors and Affiliations

  1. Department of Chemical & Process Engineering, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, Great Britain

    K. Scott & H. Cheng

Authors
  1. K. Scott
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  2. H. Cheng
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Correspondence to K. Scott.

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Scott, K., Cheng, H. The anodic behaviour of Ebonex® in oxalic acid solutions. Journal of Applied Electrochemistry 32, 583–589 (2002). https://doi.org/10.1023/A:1020107631326

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  • DOI: https://doi.org/10.1023/A:1020107631326

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