Three-dimensional nickel nanowires modified by amorphous Fe nanosheets as electrocatalysts for the oxygen evolution reaction. Issue 17 (6th April 2023)

• Record Type: Journal Article
• Authors: Zhou, Guoxu; Gao, Denghe; Dong, Yucheng; Wang, Lan; Wang, Hui; Wang, Xuyun; Linkov, Vladimir; Wang, Rongfang
• Is Part Of: Dalton transactions. Volume 52:Issue 17(2023)
• Page Start: 5680
• Page End: 5686
• Publication Date: 2023-04-06
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d3dt00535f
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Fe/Ni NWs/NF catalysts were prepared by growing iron nanosheets on chain nickel nanowires. The Fe/Ni NWs/NF electrode has a 3D layered heterostructure, on which the Fe nanosheets are amorphous and show good oxygen evolution activity. Abstract : 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.