One-step electrodeposition of V-doped NiFe nanosheets for low-overpotential alkaline oxygen evolution

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 52; no. 45; pp. 16963 - 16973
• Main Authors: Kong, Qingxiang, Wang, Junli, Liu, Zhenwei, Wu, Song, Tong, Xiaoning, Zong, Naixuan, Huang, Bangfu, Xu, Ruidong, Yang, Linjing
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 21.11.2023
• Subjects: Anodes; Catalysts; Electrocatalysts; Electrode materials; Electrodeposition; Hydroxides; Intermetallic compounds; Iron compounds; Nanosheets; Nickel compounds; Noble metals; Oxygen evolution reactions; Terpolymers; Threshold currents
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/d3dt03066k

As a non-noble metal electrocatalyst for the oxygen evolution reaction (OER), the binary NiFe layer double hydroxide (LDH) is expected to replace Ru-based and Ir-based anode materials for water decomposition. To attain threshold current density, nevertheless, a somewhat significant overpotential is still needed. In this work, layered double hydroxides of NiFe LDH are doped with V to form the terpolymer NiFeV LDH, which greatly increases the intrinsic activity of NiFe LDH and improves OER performance. This process is a straightforward and quick one-step electrodeposition process. Notably, NiFeV/NF has a low overpotential (218 mV at 10 mA cm −2 ) and faster kinetics (Tafel slope of 31 mV dec −1 ) as well as excellent durability and stability in 1 M KOH solution. In addition, the OER performance of the catalyst prepared in this work is better than that of a non-valuable metal catalyst that was recently reported. The V-doped NiFe LDH layered double hydroxides and the investigation of electrodeposition electrocatalytic methods in this work offer a fresh opportunity for the advancement of electrochemical technology. This paper reports the construction of a V-doped NiFe nanosheet electrolytic water oxygen evolution catalyst (NiFeV/NF) by one-step electrodeposition. The catalyst has excellent reaction kinetics and amazing oxygen evolution performance.