Tuning Redox State and Ionic Transfers of Mg/Fe-Layered Double Hydroxide Nanosheets by Electrochemical and Electrogravimetric Methods

Autor: Elise Duquesne, Stéphanie Betelu, Alain Seron, Ioannis Ignatiadis, Hubert Perrot, Catherine Debiemme-Chouvy
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Nanomaterials, Vol 10, Iss 9, p 1832 (2020)
Druh dokumentu: article
ISSN: 2079-4991
DOI: 10.3390/nano10091832
Popis: Studying the electrogravimetric behavior of Mg/Fe-layered double hydroxide (LDH) nanoparticles with an electrochemical quartz crystal microbalance demonstrates its pseudocapacitance properties of mix cation and anion exchanger. The electrochemical control of the oxidation state of iron constituting the layered sheets allowed anion intercalation/deintercalation into the LDH interlayer space. Concomitantly, in agreement with the pH of zero point of net charge of the Mg/Fe-LDH, the interfacial pH increase via catalyzed hydrogen evolution reaction allows cation electroadsorption onto the external surfaces of the nanoplatelets.
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