In situ label-free monitoring of noble metal nanoparticle-catalyzed reactions using surface-enhanced Raman spectroscopy: correlative single particle studies and mechanistic investigations

使用表面增强拉曼光谱原位无标记监测贵金属纳米颗粒催化反应：相关单颗粒研究和机理研究

• 批准号: 410889534
• 负责人: Professor Dr. Sebastian Schlücker
• 金额: --
• 依托单位: Nankai University
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/410889534?language=en
• 关键词: situ; label; free; monitoring; noble

Noble metal nanoparticles are important catalysts for many chemical reactions. Surface-enhanced Raman scattering (SERS) is capable of in situ probing the underlying molecular transformations in a label-free manner with high chemical specificity, high sensitivity, and interface selectivity. In this joint NSFC/DFG proposal, the applicants from China (Xie) and Germany (Schlücker) want to continue their existing successful collaboration and to combine their expertise for investigating the nitro-to-amino conversion on the surface of gold, platinum, and palladium nanoparticles using hydride and molecular hydrogen as reducing agents. Various bifunctional noble metal core/satellite nanoparticles with both SERS and catalytic activity will be synthesized (Xie lab) and characterized in correlative SERS spectroscopic/electron microscopic experiments at the single-particle level in custom-made reactors (Schlücker lab). By synthesizing and investigating a set of rationally designed educt molecules with the nitro group at various positions (Xie lab) we want to obtain a mechanistic understanding on how the nitro-to-amino conversion takes place. Finally, high-resolution SERS spectroscopy (Xie lab) in combination with accompanying DFT calculations (Schlücker lab) aims at resolving the corresponding reaction intermediates in a microfluidic reactor.

贵金属纳米粒子是许多化学反应的重要催化剂。表面增强拉曼散射（Sers）技术能够以无标记的方式原位探测潜在的分子转变，具有高化学特异性、高灵敏度和界面选择性。在这份国家自然科学基金/DFG联合提案中，来自中国（谢）和德国（施吕克尔）的申请人希望继续他们现有的成功合作，并将他们的专业知识联合收割机结合起来，研究使用氢化物和分子氢作为还原剂在金、铂和钯纳米颗粒表面上的硝基到氨基的转化。将合成具有Sers和催化活性的各种双功能贵金属核/卫星纳米颗粒（Xie实验室），并在定制反应器（Schlücker实验室）中在单颗粒水平上进行相关Sers光谱/电子显微镜实验。通过合成和研究一组合理设计的在不同位置具有硝基的离析物分子（谢实验室），我们希望获得关于硝基至氨基转化如何发生的机理理解。最后，高分辨率Sers光谱（Xie实验室）与伴随的DFT计算（Schlücker实验室）相结合，旨在解析微流控反应器中相应的反应中间体。