Alternating magnetic fields enhanced non-magnetic confined-ruthenium nanoparticles for efficient oxygen evolution reaction

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2025-02-20 DOI:10.1063/5.0242792

Fujin Huang, Zhenzhen Jiang, Xingfang Luo, Jiayong Hu, Chengwu Zou, Hang Zhou, Ce Hu, Wenda Zhou, Wen Lei, Cailei Yuan

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Abstract

Magnetic heating by alternating magnetic field (AMF) is a fascinating solution to break the bottleneck in oxygen evolution reaction (OER) catalyst improvement. However, practical applications of AMF in electrochemistry are always impeded by the inherent characteristics of the catalyst (i.e., non-magnetic nature and oxidizable feature). Here, a self-heating working electrode substrate of C/Fe3O4/C is proposed to be fabricated, on which non-magnetic Ru nanoparticles confined within the amorphous carbon matrix are deposited as the catalytic layer. Under AMF, magnetic Fe3O4 particle can be stimulated and generate the magnetic heating associated with Néel relaxation, which improves the OER efficiency of Ru nanoparticles with the overpotential at 10 mA cm−2 reduced by 72 mV. Together with the high stability rendered by confined structure, the exploitation of AMF on non-magnetic catalyst is confirmed, and the developed strategy offers a general pathway to advance OER catalyst performance in the future.

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交变磁场增强非磁性受限钌纳米颗粒的高效析氧反应

交变磁场磁加热是突破析氧反应催化剂改进瓶颈的一个很有前途的解决方案。然而，AMF在电化学中的实际应用总是受到催化剂固有特性（即非磁性和可氧化性）的阻碍。本研究提出了一种自加热的C/Fe3O4/C工作电极衬底，在其上沉积非磁性纳米钌作为催化层，并将其限制在非晶碳基体中。在AMF作用下，Fe3O4磁性粒子被激发产生与nsamel弛豫相关的磁加热，提高了Ru纳米粒子的OER效率，10 mA cm−2的过电位降低了72 mV。结合约束结构所带来的高稳定性，证实了AMF在非磁性催化剂上的开发，为今后提高OER催化剂性能提供了一般途径。

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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.