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Electrochemical Approach for the Production of Layered Double Hydroxides with a Well‐Defined Co/Me III Ratio
Author(s) -
Musella Elisa,
Gualandi Isacco,
Scavetta Erika,
Gazzano Massimo,
Rivalta Arianna,
Venuti Elisabetta,
Christian Meganne,
Morandi Vittorio,
Tonelli Domenica
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201903288
Subject(s) - electrochemistry , layered double hydroxides , production (economics) , materials science , chemistry , inorganic chemistry , electrode , hydroxide , economics , macroeconomics
Layered double hydroxides (LDHs) have been widely studied for their plethora of fascinating features and applications. The potentiostatic electrodeposition of LDHs has been extensively applied in the literature as a fast and direct method to substitute classical chemical routes. However, the electrochemical approach does not usually allow for a fine control of the M II /M III ratio in the synthesized material. By employing a recently proposed potentiodynamic method, LDH films of controlled composition are herein prepared with good reproducibility, using different ratios of the trivalent (Fe or Al) to bivalent (Co) cations in the electrolytic solution. All the obtained materials are shown to be effective oxygen evolution reaction (OER) catalysts, and are thoroughly characterized by a multi‐technique approach, including FE‐SEM, XRD, Raman, AES and a wide range of electrochemical procedures.