Honeycomb nanosheets F-Ni2V2O7 grown in situ on nickel foam as efficient OER electrocatalysts

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-03-26 DOI:10.1016/j.matlet.2025.138464

Lingfang Zhao , Xi Sun , Hao Yang , Nannan Dou

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引用次数: 0

Abstract

To design and synthesize high-performance, low-cost, and binder-free oxygen evolution reaction (OER) electrocatalysts is of critical importance for enhancing efficiency of electrocatalytic water splitting (EWS). Honeycomb nanosheets F-Ni₂V₂O₇ electrocatalysts, which were grown in situ on nickel foam (NF), were prepared via a facile yet efficacious two-step hydrothermal and immersion methodology. Here F-Ni₂V₂O₇ manifested outstanding OER activity, requiring only 270 mV of overpotential to achieve a current density of 100 mA·cm⁻² and a low Tafel slope of 36 mV·dec^-1. Additionally, it maintained a remarkable stability over 12 h. The particular structural features of F-Ni₂V₂O₇ imparted it with the following advantages: (1) the honeycomb nanosheets structure provided an abundance of catalytic sites; (2) F-doping improved the electrical conductivity and augmented the intrinsic active sites; (3) F-doping adjusted the electronic structure, promoting the generation of oxygen vacancies.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive