Electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes

Electrochemical oxidation using Boron-doped diamond (BDD) electrodes is a promising purification technique to remove organic pollutants, such as benzoic acid, from wastewaters. In this study the oxidation of benzoic acid has been investigated on rotating disk electrodes and in flow cells with well-d...

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Autores principales:	Anke Arts, Kevin P. van den Berg, Matheus T. de Groot, John van der Schaaf
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Benzoic acid Electrooxidation Boron doped diamond Mass transfer Rotating disk Flow cell Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/452e033d8d8f477e9e813fc2e100a70d
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spelling	oai:doaj.org-article:452e033d8d8f477e9e813fc2e100a70d2021-11-22T04:30:46ZElectrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes2666-086510.1016/j.crgsc.2021.100217https://doaj.org/article/452e033d8d8f477e9e813fc2e100a70d2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666086521001648https://doaj.org/toc/2666-0865Electrochemical oxidation using Boron-doped diamond (BDD) electrodes is a promising purification technique to remove organic pollutants, such as benzoic acid, from wastewaters. In this study the oxidation of benzoic acid has been investigated on rotating disk electrodes and in flow cells with well-defined mass transfer. The oxidation of benzoic acid on BDD proceeds via the formation of 4-hydroxybenzoic acid, which reacts in consecutive steps towards hydroquinone and benzoquinone. The ring opening in the oxidation of benzoquinone results in the formation of aliphatic carboxylic acids. It was shown that the intermediates 4-hydroxybenzoic acid and hydroquinone can be oxidized prior to water oxidation, which suggests the reaction occurs via a DET mechanism. Benzoquinone is not oxidized before water oxidation and can presumably solely be oxidized by ·OH radicals. This means that in order to oxidize benzoic acid completely to CO2 the formation of ·OH radicals is needed. Finally, the effects of mass transfer were analyzed. It was shown that the conversion rates of benzoic acid, benzoquinone and 4-hydroxybenzoic acid were below the limiting mass transfer rates, implying that these reactions are primarily limited by kinetics.Anke ArtsKevin P. van den BergMatheus T. de GrootJohn van der SchaafElsevierarticleBenzoic acidElectrooxidationBoron doped diamondMass transferRotating diskFlow cellChemistryQD1-999ENCurrent Research in Green and Sustainable Chemistry, Vol 4, Iss , Pp 100217- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Benzoic acid Electrooxidation Boron doped diamond Mass transfer Rotating disk Flow cell Chemistry QD1-999
spellingShingle	Benzoic acid Electrooxidation Boron doped diamond Mass transfer Rotating disk Flow cell Chemistry QD1-999 Anke Arts Kevin P. van den Berg Matheus T. de Groot John van der Schaaf Electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes
description	Electrochemical oxidation using Boron-doped diamond (BDD) electrodes is a promising purification technique to remove organic pollutants, such as benzoic acid, from wastewaters. In this study the oxidation of benzoic acid has been investigated on rotating disk electrodes and in flow cells with well-defined mass transfer. The oxidation of benzoic acid on BDD proceeds via the formation of 4-hydroxybenzoic acid, which reacts in consecutive steps towards hydroquinone and benzoquinone. The ring opening in the oxidation of benzoquinone results in the formation of aliphatic carboxylic acids. It was shown that the intermediates 4-hydroxybenzoic acid and hydroquinone can be oxidized prior to water oxidation, which suggests the reaction occurs via a DET mechanism. Benzoquinone is not oxidized before water oxidation and can presumably solely be oxidized by ·OH radicals. This means that in order to oxidize benzoic acid completely to CO2 the formation of ·OH radicals is needed. Finally, the effects of mass transfer were analyzed. It was shown that the conversion rates of benzoic acid, benzoquinone and 4-hydroxybenzoic acid were below the limiting mass transfer rates, implying that these reactions are primarily limited by kinetics.
format	article
author	Anke Arts Kevin P. van den Berg Matheus T. de Groot John van der Schaaf
author_facet	Anke Arts Kevin P. van den Berg Matheus T. de Groot John van der Schaaf
author_sort	Anke Arts
title	Electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes
title_short	Electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes
title_full	Electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes
title_fullStr	Electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes
title_full_unstemmed	Electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes
title_sort	electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/452e033d8d8f477e9e813fc2e100a70d
work_keys_str_mv	AT ankearts electrochemicaloxidationofbenzoicacidanditsaromaticintermediatesonborondopeddiamondelectrodes AT kevinpvandenberg electrochemicaloxidationofbenzoicacidanditsaromaticintermediatesonborondopeddiamondelectrodes AT matheustdegroot electrochemicaloxidationofbenzoicacidanditsaromaticintermediatesonborondopeddiamondelectrodes AT johnvanderschaaf electrochemicaloxidationofbenzoicacidanditsaromaticintermediatesonborondopeddiamondelectrodes
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Electrochemical oxidation of benzoic acid and its aromatic intermediates on boron doped diamond electrodes

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