Abstract
Iron electrowinning offers a greener path for steel production. While alkaline media has received the most significant attention, the acidic media declined due to low Faradaic efficiency and difficulties imposed by fragile deposits. This study proposes, for the first time, prospects for acidic Fe electrowinning using a mixed-acid electrolyte (H2SO4+C2H2O4), comparing the deposition from hematite suspensions and soluble Fe2+ salts (FeSO4.7H2O). Oxalic acid emerges as a key factor, facilitating Fe electrodeposition by forming iron complexes in solution, addressing the challenge associated with slow Fe2O3 dissolution in H2SO4.
Funder
CICECO-Aveiro Institute of Materials
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials