SHINERS for the Study of Electrochemical and Catalytic Processes

用于电化学和催化过程研究的 SHINERS

• 批准号: 2599537
• 金额: --
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2599537
• 关键词: SHINERS; Study; Electrochemical; Catalytic; Processes

Shell isolated nanoparticle enhanced Raman spectroscopy (SHINERS) is a highly useful and sensitive spectroscopic characterisation tool that allows us not only to study the structure of a molecule but to follow reactions in situ/operando. In situ/operando analysis allows for reactions and processes to be studied in real time and therefore, for any intermediate species and reactions to be seen. Raman spectroscopy by itself is not sensitive enough to complete detailed analysis of trace amounts of species and intermediates in reactions, often due to small Raman cross sections and limited lifetimes, which lead to weak signals being produced. This leads to difficulty determining what has been observed. Using metal nanoparticles, such as gold, silver, and copper, we can use the surface plasmon resonance phenomenon to enhance the signals being detected. By covering these nanoparticles in a very thin (2-4 nm) inert layer, such as SiO2 or Al-2O3, they become shell isolated nanoparticles (SHINs). This allows for the enhancing effect of the metal nanoparticles to be utilised without having an effect on the reaction, process, or molecule being studied. SHINERS show great potential for use in the in situ study of catalytic processes that use transition metals, as the SHINs will not interfere with the process and can therefore provide insight into the often complex reactions taking place. SHINERS also allow for electrochemical processes to be studied in situ for these reasons. In this research endeavour, gold nanoparticles will be encased in an inert layer of SiO2 or Al2O3 to study the catalytic process of aldehyde hydrogenation using platinum and copper via Raman spectroscopy. These shell isolated gold nanoparticles will also be used to study processes occurring on and the degradation mechanism of battery electrodes. This research will be done in conjunction with Johnson-Matthey PLC.

壳分离的纳米颗粒增强的拉曼光谱（Shiners）是一种非常有用且敏感的光谱特征工具，它不仅可以研究分子的结构，还可以遵循原位/操作的反应。原位/操作分析允许实时研究反应和过程，因此，对于任何中间物种和反应，可以看到。拉曼光谱本身不够敏感，无法完成反应中物种和中间体的详细分析，这通常是由于小的拉曼横截面和有限的寿命引起的，这会导致产生较弱的信号。这导致难以确定观察到的内容。使用金属纳米颗粒，例如金，银和铜，我们可以使用表面等离子体共振现象来增强所检测到的信号。通过将这些纳米颗粒覆盖在非常薄（2-4 nm）的惰性层（例如SiO2或Al-2O3）中，它们成为壳分离的纳米颗粒（Shins）。这样可以利用金属纳米颗粒的增强作用，而不会对被研究的反应，过程或分子产生影响。 Shiners在对使用过渡金属的催化过程的原位研究中具有巨大的使用潜力，因为海绵不会干扰该过程，因此可以深入了解发生的经常复杂的反应。出于这些原因，Shiners还允许原位研究电化学过程。在这项研究的努力中，金纳米颗粒将被包裹在SiO2或Al2O3的惰性层中，以通过拉曼光谱法使用铂和铜来研究醛氢化的催化过程。这些壳分离的金纳米颗粒也将用于研究电池电极的发生的过程和降解机理。这项研究将与Johnson-Matthey Plc一起完成。