2‐Methoxyhydroquinone from Vanillin for Aqueous Redox‐Flow Batteries

We show the synthesis of a redox‐active quinone, 2‐methoxy‐1,4‐hydroquinone (MHQ), from a bio‐based feedstock and its suitability as electrolyte in aqueous redox flow batteries. We identified semiquinone intermediates at insufficiently low pH and quinoid radicals as responsible for decomposition of...

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Detalles Bibliográficos
Autores principales: Schlemmer, Werner, Nothdurft, Philipp, Petzold, Alina, Riess, Gisbert, Frühwirt, Philipp, Schmallegger, Max, Gescheidt‐Demner, Georg, Fischer, Roland, Freunberger, Stefan A., Kern, Wolfgang, Spirk, Stefan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7891622/
https://www.ncbi.nlm.nih.gov/pubmed/32815619
http://dx.doi.org/10.1002/anie.202008253
Descripción
Sumario:We show the synthesis of a redox‐active quinone, 2‐methoxy‐1,4‐hydroquinone (MHQ), from a bio‐based feedstock and its suitability as electrolyte in aqueous redox flow batteries. We identified semiquinone intermediates at insufficiently low pH and quinoid radicals as responsible for decomposition of MHQ under electrochemical conditions. Both can be avoided and/or stabilized, respectively, using H(3)PO(4) electrolyte, allowing for reversible cycling in a redox flow battery for hundreds of cycles.

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