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

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...

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Veröffentlicht in:	Nanomaterials (Basel, Switzerland) Switzerland), 2020-09, Vol.10 (9), p.1832
Hauptverfasser:	Duquesne, Elise, Betelu, Stéphanie, Seron, Alain, Ignatiadis, Ioannis, Perrot, Hubert, Debiemme-Chouvy, Catherine
Format:	Artikel
Sprache:	eng
Schlagworte:	Anion exchanging Chemical Sciences Communication electrochemical quartz crystal microbalance (EQCM) Electrochemistry Electrodes Electrolytes Gold Hydrogen evolution reactions Hydroxides Interlayers Investigations ionic exchanges Iron layered double hydroxide (LDH) Magnesium Nanoparticles Nanosheets Nitrates Oxidation pH effects Quartz crystal microbalance Quartz crystals Redox properties redox reactions Spectrum analysis Valence
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Zusammenfassung:	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.
ISSN:	2079-4991 2079-4991
DOI:	10.3390/nano10091832