Fe0.7Ni0.3/Ni(OH)2 nanosheet arrays electrodeposited on nickel foam for alkaline oxygen evolution reaction

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-08-18 DOI:10.1016/j.materresbull.2025.113734

Huihui Li, Qianqian Zhu, Sijia Liu, Shifeng Li, Qingqing Zha, Yonghong Ni

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Abstract

Hydrogen energy, as an ideal alternative to fossil fuels, plays an important role in the process of energy transformation. In this work, Fe_0.7Ni_0.3/Ni(OH)₂ nanosheets were successfully constructed on nickel foam (labeled as Fe_0.7Ni_0.3/Ni(OH)₂/NF) by a cathodic electrodeposition technique, using ferrous sulfate and nickel sulfate as iron and nickel sources. Electrochemical measurements showed that the as-constructed Fe_0.7Ni_0.3/Ni(OH)₂/NF electrode owned excellent electrocatalytic OER activity. In 1 M KOH solution, the Fe_0.7Ni_0.3/Ni(OH)₂/NF electrode required only 198 mV of overpotential to achieve a current density of 10 mA cm^-2. In addition, at a large current density of 100 mA cm^-2, the Fe_0.7Ni_0.3/Ni(OH)₂/NF electrode could run stably for >210 h without marked potential attenuation, exhibiting excellent durability of the present self-supporting electrode. The in-situ Raman spectra studies revealed that the synergistic effect between Fe and Ni facilitated the production of the active substance NiOOH at a lower voltage, which effectively promotes the charge redistribution around the Ni/Fe site and the OER kinetics, further improving the OER performance. The present work provides a new strategy to construct highly-active and durable FeNi-based intermetallic electrocatalyst for oxygen evolution in alkaline media.

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在泡沫镍表面电沉积Fe0.7Ni0.3/Ni(OH)2纳米片阵列进行碱性析氧反应

氢能作为化石燃料的理想替代品，在能源转型过程中发挥着重要作用。本文以硫酸亚铁和硫酸镍为铁源和镍源，采用阴极电沉积技术在泡沫镍（标记为Fe0.7Ni0.3/Ni(OH)2/NF）上成功构建了Fe0.7Ni0.3/Ni(OH)2纳米片。电化学测试表明，构建的Fe0.7Ni0.3/Ni(OH)2/NF电极具有良好的电催化OER活性。在1 M KOH溶液中，Fe0.7Ni0.3/Ni(OH)2/NF电极仅需198 mV过电位即可达到10 mA cm-2的电流密度。此外，在100 mA cm-2的大电流密度下，Fe0.7Ni0.3/Ni(OH)2/NF电极可以稳定运行约210 h，没有明显的电位衰减，显示了该自支撑电极优异的耐用性。原位拉曼光谱研究表明，Fe和Ni之间的协同作用促进了活性物质NiOOH在较低电压下的生成，有效地促进了Ni/Fe位点周围电荷的重新分配和OER动力学，进一步提高了OER性能。本研究为构建高效耐用的碱性介质中析氧金属间电催化剂提供了新思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.