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Analysis of the Composition of Bromide Anion Oxidation Products in Aqueous Solutions with Different pH via Rotating Ring-Disk Electrode Method

We measured the ring collection coefficient of bromide anion oxidation products in a neutral and slightly alkaline medium on a rotating ring-disk electrode (glassy carbon disk, platinum ring) varying the following parameters: disk electrode rotation velocity, sodium bromide concentration, pH of the...

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Autores principales: Pichugov, Roman, Konev, Dmitry, Speshilov, Ivan, Abunaeva, Lilia, Petrov, Mikhail, Vorotyntsev, Mikhail Alexeevich
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504282/
https://www.ncbi.nlm.nih.gov/pubmed/36135839
http://dx.doi.org/10.3390/membranes12090820
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author Pichugov, Roman
Konev, Dmitry
Speshilov, Ivan
Abunaeva, Lilia
Petrov, Mikhail
Vorotyntsev, Mikhail Alexeevich
author_facet Pichugov, Roman
Konev, Dmitry
Speshilov, Ivan
Abunaeva, Lilia
Petrov, Mikhail
Vorotyntsev, Mikhail Alexeevich
author_sort Pichugov, Roman
collection PubMed
description We measured the ring collection coefficient of bromide anion oxidation products in a neutral and slightly alkaline medium on a rotating ring-disk electrode (glassy carbon disk, platinum ring) varying the following parameters: disk electrode rotation velocity, sodium bromide concentration, pH of the medium (in the range of 6–12), anode current on the disk, and the electroreduction potential of the bromide anion oxidation products on the ring. The data obtained are presented via dependences of the cathode ring current on the disk current ratio vs. the ring electrode potential. The analysis of the results was carried out by comparing the experimental polarization curves of the ring electrode with the data of cyclic voltammetry in model solutions to determine the electrical activities of various bromine compounds in positive oxidation states. We claim that the RRDE method could be used to obtain quantitative and qualitative data on the electrooxidation of bromide ions in neutral and alkaline solutions. For the most effective regeneration of the spent oxidizer, the values of pH > 10 and moderate concentrations of NaBr should be used.
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spelling pubmed-95042822022-09-24 Analysis of the Composition of Bromide Anion Oxidation Products in Aqueous Solutions with Different pH via Rotating Ring-Disk Electrode Method Pichugov, Roman Konev, Dmitry Speshilov, Ivan Abunaeva, Lilia Petrov, Mikhail Vorotyntsev, Mikhail Alexeevich Membranes (Basel) Article We measured the ring collection coefficient of bromide anion oxidation products in a neutral and slightly alkaline medium on a rotating ring-disk electrode (glassy carbon disk, platinum ring) varying the following parameters: disk electrode rotation velocity, sodium bromide concentration, pH of the medium (in the range of 6–12), anode current on the disk, and the electroreduction potential of the bromide anion oxidation products on the ring. The data obtained are presented via dependences of the cathode ring current on the disk current ratio vs. the ring electrode potential. The analysis of the results was carried out by comparing the experimental polarization curves of the ring electrode with the data of cyclic voltammetry in model solutions to determine the electrical activities of various bromine compounds in positive oxidation states. We claim that the RRDE method could be used to obtain quantitative and qualitative data on the electrooxidation of bromide ions in neutral and alkaline solutions. For the most effective regeneration of the spent oxidizer, the values of pH > 10 and moderate concentrations of NaBr should be used. MDPI 2022-08-23 /pmc/articles/PMC9504282/ /pubmed/36135839 http://dx.doi.org/10.3390/membranes12090820 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pichugov, Roman
Konev, Dmitry
Speshilov, Ivan
Abunaeva, Lilia
Petrov, Mikhail
Vorotyntsev, Mikhail Alexeevich
Analysis of the Composition of Bromide Anion Oxidation Products in Aqueous Solutions with Different pH via Rotating Ring-Disk Electrode Method
title Analysis of the Composition of Bromide Anion Oxidation Products in Aqueous Solutions with Different pH via Rotating Ring-Disk Electrode Method
title_full Analysis of the Composition of Bromide Anion Oxidation Products in Aqueous Solutions with Different pH via Rotating Ring-Disk Electrode Method
title_fullStr Analysis of the Composition of Bromide Anion Oxidation Products in Aqueous Solutions with Different pH via Rotating Ring-Disk Electrode Method
title_full_unstemmed Analysis of the Composition of Bromide Anion Oxidation Products in Aqueous Solutions with Different pH via Rotating Ring-Disk Electrode Method
title_short Analysis of the Composition of Bromide Anion Oxidation Products in Aqueous Solutions with Different pH via Rotating Ring-Disk Electrode Method
title_sort analysis of the composition of bromide anion oxidation products in aqueous solutions with different ph via rotating ring-disk electrode method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9504282/
https://www.ncbi.nlm.nih.gov/pubmed/36135839
http://dx.doi.org/10.3390/membranes12090820
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