CoFeP纳米棒磁电化学析氧反应的实验与理论研究

IF 4.4 3区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Mohammed Arkham Belgami, Afsal S Shajahan, Erdenebayar Baasanjav, Vishwanath Ankalgi, Brahmananda Chakraborty, Sang Mun Jeong, Chandra Sekhar Rout
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引用次数: 0

摘要

追求低成本、高效、耐用的碱性介质析氧电催化剂对于水分解应用至关重要。本文报道了基于水热法合成由FeP、CoP和Fe2P组成的多相铁磁催化剂CoFeP。结构分析证实了相的共存,电化学研究显示了优异的OER活性。CoFeP在50 mA cm−2时的过电位为335 mV,无磁场时的Tafel斜率为116 mV dec−1,而在2000 G的磁场下,这两个值分别降至235 mV和93 mV dec−1。这种增强是由于磁场诱导的自旋极化、表面重建和ECSA从70到110 mF cm−2的增加,突出了磁调制提高催化性能的潜力。通过自旋极化密度泛函理论(DFT)模拟,阐明了CoFeP的结构和电子特征,为其在析氧反应(OER)中的作用提供了理论依据。本研究表明,外部磁场的应用显著降低了OER所需的过电位,因为中间物质的吸附由于更多的电荷转移而变得更强,这与实验观察结果一致。这些发现突出了磁场与电催化性能之间的相互作用,为提高能量转换效率提供了一条途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Experimental and Theoretical Investigations on Magneto-Electrochemical Oxygen Evolution Reaction of CoFeP Nanorods

Experimental and Theoretical Investigations on Magneto-Electrochemical Oxygen Evolution Reaction of CoFeP Nanorods

Experimental and Theoretical Investigations on Magneto-Electrochemical Oxygen Evolution Reaction of CoFeP Nanorods

Experimental and Theoretical Investigations on Magneto-Electrochemical Oxygen Evolution Reaction of CoFeP Nanorods

Experimental and Theoretical Investigations on Magneto-Electrochemical Oxygen Evolution Reaction of CoFeP Nanorods

The pursuit of low-cost, efficient, and durable electrocatalysts for oxygen evolution in alkaline media is vital for water-splitting applications. Herein, the hydrothermal-based synthesis of a multiphase ferromagnetic catalyst CoFeP, comprising FeP, CoP, and Fe2P is reported. Structural analyses confirm the coexistence of phases, and electrochemical studies reveal excellent OER activity. CoFeP exhibits an overpotential of 335 mV at 50 mA cm−2 and a Tafel slope of 116 mV dec−1 without a magnetic field, whereas under the magnetic field of 2000 G, these values lowered to 235 mV and 93 mV dec−1, respectively. The enhancement is attributed to magnetic-field-induced spin polarization, surface reconstruction, and increased ECSA from 70 to 110 mF cm−2, highlighting the potential of magnetic modulation for boosting catalytic performance. Through spin-polarized Density Functional Theory (DFT) simulations, the structural and electronic features of CoFeP, providing theoretical insights into its role in the Oxygen Evolution Reaction (OER) is elucidated. This investigation demonstrates that the application of an external magnetic field significantly reduces the overpotential required for OER as the adsorption of intermediate species becomes stronger due to more charge transfer, aligning with experimental observations. These findings highlight the interplay between magnetic fields and electrocatalytic performance, offering a pathway to enhance energy conversion efficiency.

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来源期刊
Advanced Materials Interfaces
Advanced Materials Interfaces CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
8.40
自引率
5.60%
发文量
1174
审稿时长
1.3 months
期刊介绍: Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018. The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface. Advanced Materials Interfaces covers all topics in interface-related research: Oil / water separation, Applications of nanostructured materials, 2D materials and heterostructures, Surfaces and interfaces in organic electronic devices, Catalysis and membranes, Self-assembly and nanopatterned surfaces, Composite and coating materials, Biointerfaces for technical and medical applications. Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.
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