Laser-Synthesized Defect-Rich Gold Nanoparticles with Exclusive Strain Effect for Enhanced Electrocatalytic Hydrogen Evolution

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-08-18 DOI:10.1007/s10562-025-05151-0

Yang Hu, Chao Zhang, Songbai Qiu

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引用次数: 0

Abstract

Introducing lattice defects represents a potent strategy to boost the electrocatalytic performance of metal nanoparticles (NPs) toward the hydrogen evolution reaction (HER). In this work, lattice distortion defect-rich Au NPs (Defect-Au NPs) is prepared via a non-equilibrium laser irradiation method. The lattice distortion defects induced strain effect in Defect-Au NPs could generate more exposed active sites and enhance the adsorption of H* intermediates, synergistically accelerating the reaction kinetics and promoting electrocatalytic HER activity. Leveraging this optimized defect configuration, Defect-Au NPs demonstrate an enhanced HER activity, which achieves a much lower overpotential of 185 mV at 10 mA cm^–2 in 0.5 M H₂SO₄ compare to Bulk Au (407 mV@10 mA cm^–2) and Au NPs without lattice defects (Defect free-Au NPs, 317 mV@10 mA cm^–2). More importantly, Defect-Au NPs also present high electrocatalytic stability for over 50 h at a current density of 50 mA cm^–2 without activity degradation, while post-reaction characterization confirms its structural stability with well-retained lattice distortion and strain. This work pioneers an innovative approach for designing highly efficient electrocatalysts towards diverse applications.

Graphical Abstract

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具有独占应变效应的激光合成富缺陷金纳米颗粒增强电催化析氢

引入晶格缺陷是提高金属纳米颗粒（NPs）对析氢反应（HER）电催化性能的有效策略。本文采用非平衡激光辐照法制备了晶格畸变缺陷丰富的Au NPs （Defect-Au NPs）。在Defect-Au NPs中，晶格畸变缺陷引起的应变效应可以产生更多暴露的活性位点，增强H*中间体的吸附，协同加速反应动力学，提高电催化HER活性。利用这种优化的缺陷结构，defect -Au NPs表现出增强的HER活性，与Bulk Au （407 mV@10 mA cm-2）和没有晶格缺陷的Au NPs （317 mV@10 mA cm-2）相比，在0.5 M H2SO4中，defect -Au NPs在10 mA cm-2下实现了185 mV的过电位。更重要的是，在50 mA cm-2的电流密度下，Defect-Au NPs还表现出50小时以上的高电催化稳定性，没有活性下降，而反应后的表征证实了它的结构稳定性，具有良好的晶格畸变和应变。这项工作开创了一种创新的方法来设计高效的电催化剂，用于各种应用。图形抽象

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

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.