用干涉电光显微镜成像纳米二硫化钼的动态电催化过程

IF 60.1 1区材料科学 Q1 ENERGY & FUELS

Nature Energy Pub Date : 2026-04-24 DOI:10.1038/s41560-026-02043-4

Kaijie Ma (马凯捷), Yu Cui (崔宇), Yizhang Ren (任奕璋), Qiunan Liu (刘秋男), Song Luo (罗嵩), Jiaxin Mao (毛嘉欣), Guopeng Li (李国鹏), Yueshao Zheng (郑月哨), Kazu Suenaga (末永和知), Jiang Zeng (曾犟), Yung-Chang Lin (林永昌), Song Liu (刘松), Rui Hao (郝瑞)

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引用次数: 0

摘要

了解电化学界面析氢反应的动态非均质性对推进析氢电催化具有重要意义。然而，传统的电化学成像方法提供有限的同时空间和时间分辨率，阻碍了动态电催化电流分布的捕获。在这里，我们引入干涉式电光显微镜，以纳米和毫秒分辨率同时绘制电催化电流的原位图。我们用Au和Pt电催化剂验证了干涉电光显微镜，并应用它来研究双层MoS2的HER活性。HER电流的空间演化揭示了HER位点沿着与二硫化钼之形或扶手椅方向对齐的轨迹的顺序激活。相关的原子水平结构分析和模拟表明，定向链电催化反应动力学源于纳米尺度应变条纹上更有利的吸附自由能。这种方法揭示了纳米级电化学界面上动态变化的结构关系，并确定了与应变相关的电催化性能，有望促进电催化剂的合理设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Imaging dynamic electrocatalytic processes on nano-strained MoS2 using interferometric electro-optical microscopy

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Imaging dynamic electrocatalytic processes on nano-strained MoS2 using interferometric electro-optical microscopy

Understanding the dynamic heterogeneity of the hydrogen evolution reaction (HER) at electrochemical interfaces is crucial for advancing HER electrocatalysis. However, conventional electrochemical imaging methods offer limited simultaneous spatial and temporal resolution, hindering capture of dynamic electrocatalytic current distributions. Here we introduce interferometric electro-optical microscopy to in situ map electrocatalytic current with simultaneous nanometre and millisecond resolution. We validate interferometric electro-optical microscopy with Au and Pt electrocatalysts and apply it to investigate the HER activity of bilayer MoS2. The spatial evolution of HER currents reveals sequential activation of HER sites along trajectories aligned with the zigzag or armchair directions of MoS2. Correlative atomic-level structural analysis and simulations reveal that the directional chain electrocatalytic reaction dynamics originate from the more favourable adsorption free energy along nanoscale strain stripes. This method for uncovering dynamically evolving structure relationships at nanoscopic electrochemical interfaces and identifying strain-related electrocatalytic performance holds promise for advancing the rational design of electrocatalysts.

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来源期刊

Nature Energy Energy-Energy Engineering and Power Technology

CiteScore

75.10

自引率

1.10%

发文量

193

期刊介绍： Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies. With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector. Maintaining the hallmark standards of the Nature brand, Nature Energy boasts a dedicated team of professional editors, a rigorous peer-review process, meticulous copy-editing and production, rapid publication times, and editorial independence. In addition to original research articles, Nature Energy also publishes a range of content types, including Comments, Perspectives, Reviews, News & Views, Features, and Correspondence, covering a diverse array of disciplines relevant to the field of energy.