Realizing the key role of magnetic domain walls in magnetic field-enhanced oxygen evolution reaction

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2025-02-06 DOI:10.1063/5.0252458

Yanli Jin, Jiawei Liu, Wenda Zhou, Ce Hu, Zhenzhen Jiang, Hang Zhou, Chengwu Zou, Yong Yang, Ting Yu, Xingfang Luo, Wen Lei, Cailei Yuan

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引用次数: 0

Abstract

Understanding the relationship between magnetic structures (magnetic domains and domain walls) and enhanced activity is crucial for elucidating the mechanism behind magnetic field-assisted oxygen evolution reaction (OER). In this work, two-dimensional CoSe2 nanosheets with room-temperature ferromagnetic properties and structural stability were synthesized using chemical vapor deposition. Electrochemical measurements suggest that OER performance of CoSe2 nanosheets is improved under a 200 mT magnetic field, with the overpotential at 10 mA cm−2 reduced by 81 mV. Moreover, magnetic force microscopy observations on CoSe2 nanosheets reveal that spin disorder in the magnetic domain wall region transforms to spin order under the 200 mT magnetic field, resulting in improved OER performance. Although the magnetic field has a negligible effect on the OER performance of single-domain CoSe2 nanosheets, these findings reveal the decisive role of magnetic domain walls in enhancing OER performance under an applied magnetic field, pointing to the potential for industrial applications of magnetic field-assisted catalysis.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.