Electrochemical Reduction Pathways from Goethite to Green Iron in Alkaline Solution with Silicate Additive.

ABSTRACT: Energy-efficient and low-temperature iron electrolysis in alkaline solutions is a low-cost and sustainable ironmaking process with zero-carbon emissions when renewable electrical sources are involved. However, its implementation is hindered by electrochemically inert Fe₃O₄ and parasitic H₂ gas formation during the electrochemical reduction process, resulting in the low energy efficiency of iron electrolysis. Here, we further explore the potential of electrochemical reduction of goethite (FeOOH) by employing a low concentration of silicate additive in an alkaline solution to mitigate Fe₃O₄ accumulation and H₂ generation. Electrochemical measurements coupled with operando X-ray diffraction and X-ray absorption spectroscopy sug

SUBMITTER: Arumugam D 

PROVIDER: S-EPMC12308757 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature