| 초록 |
Alongside rare-earth metals, Ni, Fe, Co, Cu are some of the critical materials that will be in huge demand thanks to growth in clean-energy sector. Through an effortless synthesis procedure and surface modification, a robust as well as a highly active anode scrap stainless steel wires (SSW) from worn-out tires exhibited low overpotentials especially at high current densities with remarkable durability and endurance. SSW by corrosion engineering is exercised as an in situ formed freestanding robust electrode for the oxygen evolution reaction (OER). By superficial corrosion of SSW, inherent active species are unmasked in the form of Ni/FeOOH nanocrystallites displaying efficient water oxidation by reaching 500 mA cm−2 at low overpotential (η500) of 287 mV in 1 m KOH. Promisingly, when used in industrial conditions, 5 m KOH, 343 K, this electrode demonstrate abnormal activity by yielding high anodic current density of 1000 mA cm−2 at η = 233 mV. This work may inspire researchers to explore and reutilize high-demand metals from scrap for addressing critical material shortfalls in clean-energy technologies. |
