Electrowinning for Room-Temperature Ironmaking: Mapping the Electrochemical Aqueous Iron Interface
Lance Kavalsky,
Venkatasubramanian Viswanathan
Abstract:A promising route toward room-temperature ironmaking is electrowinning, where iron ore dissolution is coupled with cation electrodeposition to grow pure iron. However, poor faradaic efficiencies against the hydrogen evolution reaction (HER) is a major bottleneck. To develop a mechanistic picture of this technology, we conduct a first-principles thermodynamic analysis of the Fe110 aqueous electrochemical interface. Constructing a surface Pourbaix diagram, we predict that the iron surface will always drive towar… Show more
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