Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6603333 | Electrochimica Acta | 2018 | 25 Pages |
Abstract
Ethylene glycol was studied as solvent for the electrodeposition of iron from both bivalent and trivalent iron chloride solutions. Using cyclic voltammetry (CV) on Pt electrodes, the impossibility to directly reduce Fe(III) ions to metallic state Fe(0) was evidenced with the formation of Fe(II) species as intermediate step for iron plating. Linear sweep voltammetries (LSVs) were carried out on copper substrate confirming the results previously obtained on platinum. Potentiostatic depositions were performed from both Fe(II) and Fe(III) solutions in a broad potential interval (from â1.5 to â2.3â¯V vs Pt) to define the threshold value for iron reduction and film formation: the best results were obtained at â1.7â¯V vs Pt for Fe(II) solution and at â2.3â¯V vs Pt for Fe(III) one. Deposits were characterized with field emission scanning electron microscope (FE-SEM) showing a nanostructured morphology with no traces of oxygen in the deposits, resulting in a pure metallic plated iron: films showed a corrosion potential (Ecorrâ¯=â¯â0.54â¯V vs Ag/AgCl ) in 3.5â¯wt% NaCl aqueous solution similar to high purity metallurgical iron sheet (Ecorrâ¯=â¯â0.4â¯V vs Ag/AgCl ). X-Ray diffraction patterns showed a preferential orientation of the nanocrystalline deposit along the BCC [110] direction. Vibrating sample magnetometer (VSM) analysis showed a good saturation magnetization (1500â¯Â±â¯100â¯kA/m) and low coercivity (â¼20â¯Oe) indicative of a high purity iron film.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Gabriele Panzeri, Alessandra Accogli, Eugenio Gibertini, Christian Rinaldi, Luca Nobili, Luca Magagnin,