Paired electrosynthesis of aminoiminomethane-sulfonic acids

Aminoiminomethane-sulfonic acids were prepared by the cathodic indirect oxidation of the corresponding thioureas using a pertungstate/tungstate redox mediator driven by H 2O 2 electrogenerated from O 2 at a cathode and by the anodic indirect oxidation using a Cl 2/Cl − redox mediator at an anode. Af...

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Published in:Electrochimica acta 1999, Vol.44 (15), p.2605-2612
Main Authors: Li, Wei, Nonaka, Tsutomu
Format: Article
Language:English
Subjects:
Aminoiminomethane-sulfonic acid
Cathodic and anodic indirect oxidations
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Kinetics and mechanism of reactions
Paired electrosynthesis
Pertungstate/tungstate redox mediator
Thiourea
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description Aminoiminomethane-sulfonic acids were prepared by the cathodic indirect oxidation of the corresponding thioureas using a pertungstate/tungstate redox mediator driven by H 2O 2 electrogenerated from O 2 at a cathode and by the anodic indirect oxidation using a Cl 2/Cl − redox mediator at an anode. Affecting factors for this kind of paired electrosynthesis, such as pH, temperature, current density, amount of charge passed, supporting electrolyte and electrode material were optimized for both the cathodic and anodic oxidations. The paired electrosynthesis was carried out in H-type and flow-type divided cells, and maximum current efficiencies of 136 and 142% could be obtained, respectively. Mechanism of the both indirect electrooxidations was also investigated.
doi_str_mv 10.1016/S0013-4686(98)00393-4
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subjects Aminoiminomethane-sulfonic acid
Cathodic and anodic indirect oxidations
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Kinetics and mechanism of reactions
Paired electrosynthesis
Pertungstate/tungstate redox mediator
Thiourea
title Paired electrosynthesis of aminoiminomethane-sulfonic acids
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