材料科学
纳米棒
等离子体子
纳米颗粒
双金属片
飞秒
光电流
光热治疗
表面等离子共振
纳米技术
光电子学
贵金属
激光器
催化作用
金属
光学
化学
物理
冶金
生物化学
作者
Mohammadreza Nazemi,Sajanlal R. Panikkanvalappil,Chih-Kai Liao,Mahmoud A. Mahmoud,Mostafa A. El‐Sayed
出处
期刊:ACS Nano
[American Chemical Society]
日期:2021-05-25
卷期号:15 (6): 10241-10252
被引量:22
标识
DOI:10.1021/acsnano.1c02347
摘要
Utilizing solar energy for chemical transformations has attracted a growing interest in promoting the clean and modular chemical synthesis approach and addressing the limitations of conventional thermocatalytic systems. Under light irradiation, noble metal nanoparticles, particularly those characterized by localized surface plasmon resonance, commonly known as plasmonic nanoparticles, generate a strong electromagnetic field, excited hot carriers, and photothermal heating. Plasmonic nanoparticles enabling efficient absorption of light in the visible range have moderate catalytic activities. However, the catalytic performance of a plasmonic nanoparticle can be significantly enhanced by incorporating a highly catalytically active metal domain onto its surface. In this study, we demonstrate that femtosecond laser-induced atomic redistribution of metal domains in bimetallic Au–Pd nanorods (NRs) can enhance its photocurrent response by 2-fold compared to parent Au–Pd NRs. We induce structure changes on Au–Pd NRs by irradiating them with a femtosecond pulsed laser at 808 nm to precisely redistribute Pd atoms on AuNR surfaces, resulting in modified electronic and optical properties and, thereby, enhanced catalytic activity. We also investigate the trade-off between the effect of light absorption and catalytic activity by optimizing the structure and composition of bimetallic Au–Pd nanoparticles. This work provides insight into the design of hybrid plasmonic–catalytic nanostructures with well-tailored geometry, composition, and structure for solar-fuel-based applications.
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