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Electrocatalytic reduction ofo andm-nitroanilines at a Ti/ceramic TiO2 cathode

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Abstract

Galvanostatic reduction ofo andm-nitroanilines to the corresponding phenylenediamines has been carried out in aqueous H2SO4 medium at a Ti/ceramic TiO2 cathode under varying conditions of acid strength, current density and temperature. The best conditions for obtaining maximum yields of the corresponding diamines have been established. Results show higher current efficiency for diamine formation at a Ti/ceramic TiO2 cathode in comparison with those obtained at a copper cathode under identical conditions, thus indicating the electrocatalytic nature of the former. Experiments on the re-use of the electrolyte have also been carried out, the results of which show that the yields of the corresponding diamines are not affected up to the fourth re-use of the electrolyte. Cyclic voltammetric studies on the reduction of these compounds confirm that the reduction of the nitro group is catalysed by Ti4+/Ti3+ redox species at the electrode.

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Ravichandran, C., Vasudevan, D. & Anantharaman, P.N. Electrocatalytic reduction ofo andm-nitroanilines at a Ti/ceramic TiO2 cathode. J Appl Electrochem 22, 1192–1196 (1992). https://doi.org/10.1007/BF01297423

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  • DOI: https://doi.org/10.1007/BF01297423

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