In Situ Manipulation of Surface Spin Configurations for Enhanced Performance in Oxygen Evolution Reactions

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-01-13 DOI:10.1021/acs.nanolett.4c05609

Chao Zhong, Wenda Zhou, Xingfang Luo, Tingfeng Li, Fujin Huang, Jiayong Hu, Zhenzhen Jiang, Ce Hu, Wen Lei, Cailei Yuan

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Abstract

In situ studies of the relationship between surface spin configurations and spin-related electrocatalytic reactions are crucial for understanding how magnetic catalysts enhance oxygen evolution reaction (OER) performance under magnetic fields. In this work, 2D Fe₇Se₈ nanosheets with rich surface spin configurations are synthesized via chemical vapor deposition. In situ magnetic force microscopy and Raman spectroscopy reveal that a 200 mT magnetic field eliminates spin-disordered domain walls, forming a spin-ordered single-domain structure, which lowers the OER energy barrier, as confirmed by theoretical calculations. Electrochemical tests show that under a 200 mT magnetic field, the OER overpotential of multidomain Fe₇Se₈ nanosheets at 10 mA cm^–2 decreases from 346 mV to 259 mV, while the magnetic field has minimal effect on single-domain nanosheets. These findings highlight the critical role of spin configurations in enhancing electrocatalytic performance, offering new insights into the design of magnetic catalysts for industrial applications.

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原位操纵表面自旋构型以提高氧进化反应性能

对表面自旋构型与自旋相关电催化反应之间关系的现场研究，对于了解磁性催化剂如何在磁场下提高氧进化反应（OER）性能至关重要。本研究通过化学气相沉积合成了具有丰富表面自旋构型的二维 Fe7Se8 纳米片。原位磁力显微镜和拉曼光谱显示，200 mT 的磁场消除了自旋有序的畴壁，形成了自旋有序的单畴结构，从而降低了 OER 能垒，理论计算也证实了这一点。电化学测试表明，在 200 mT 磁场下，多域 Fe7Se8 纳米片在 10 mA cm-2 下的 OER 过电位从 346 mV 降至 259 mV，而磁场对单域纳米片的影响微乎其微。这些发现凸显了自旋构型在提高电催化性能方面的关键作用，为工业应用磁性催化剂的设计提供了新的见解。

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

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.