Journal
DALTON TRANSACTIONS
Volume 52, Issue 17, Pages 5680-5686Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3dt00535f
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In this study, Fe/Ni NWs/NF catalysts with abundant active surface sites were prepared by hydrothermal and electrochemical deposition. The synthesized electrode possessed a 3D layered heterostructure and crystalline-amorphous interfaces, containing amorphous Fe nanosheets, which demonstrated excellent activity in OER.
The development of electrode materials with abundant active surface sites is important for large-scale hydrogen production by water electrolysis. In this study, Fe/Ni NWs/NF catalysts were prepared by hydrothermal and electrochemical deposition of iron nanosheets on nickel chain nanowires, initially grown on nickel foam. The synthesized Fe/Ni NWs/NF electrode possessed a 3D layered heterostructure and crystalline-amorphous interfaces, containing amorphous Fe nanosheets, which demonstrated excellent activity in the oxygen evolution reaction (OER). The newly prepared electrode material has a large specific surface area, and its electrocatalytic performance is characterized by a small Tafel slope and an oxygen evolution overpotential of 303 mV at 50 mA cm(-2). The electrode was highly stable in alkaline media with no degradation observed after 40 h of continuous OER operation at 50 mA cm(-2). The study demonstrates the significant promise of the Fe/Ni NWs/NF electrode material for large-scale hydrogen production by water electrolysis and provides a facile and low-cost approach for the preparation of highly active OER electrocatalysts.
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