Olívia B.M. Aranha , Thiago O. Pereira , André L. Menezes de Oliveira , Ricardo F. Alves , Bruno A. S. G. Lima , Alex M. Neris , Marco A. Morales , Alexandre B. Oliveira , Márcio M. Soares , Daniel A. Macedo , Ieda M. Garcia dos Santos
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引用次数: 0
Abstract
α-Fe2WO6 (FWO) was successfully synthesized by the modified Pechini method and applied as an electrocatalyst for the oxygen evolution reaction (OER) for the first time. The FWO sample was systematically investigated by XRD, FTIR, Raman, FE-SEM/EDS, TEM, EPR and Mössbauer spectroscopy to understand its properties. FWO showed promising electrochemical performance with an overpotential of 306 mV@10 mA cm−2 and a Tafel slope of 48.5 mV dec−1, associated with the charge balance in the materials lattice involving essentially Fe3+ and W6+ cations. The catalyst exhibited excellent short-term stability for 24 h at 10 mA cm−2, indicating its potential as a cost-effective alternative for OER.
采用改进的Pechini方法成功合成了α-Fe2WO6 (FWO)，并首次将其作为析氧反应（OER）的电催化剂。采用XRD、FTIR、Raman、FE-SEM/EDS、TEM、EPR、Mössbauer等方法对样品进行了系统的表征。该材料的过电位为306 mV@10 mA cm−2，Tafel斜率为48.5 mV dec−1，具有良好的电化学性能，主要涉及Fe3+和W6+阳离子。该催化剂在10 mA cm−2条件下表现出24小时的优异短期稳定性，表明其具有作为OER替代品的经济效益。
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
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