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.

壳隔离纳米颗粒增强拉曼光谱（SHINERS）是一种非常有用和灵敏的光谱表征工具，它不仅允许我们研究分子的结构，还允许我们跟踪原位/操作中的反应。原位/操作分析允许在真实的时间内研究反应和过程，因此，可以看到任何中间物质和反应。拉曼光谱本身不够灵敏，无法完成对反应中痕量物质和中间体的详细分析，这通常是由于小的拉曼截面和有限的寿命，这导致产生弱信号。这导致难以确定观察到了什么。使用金属纳米颗粒，如金、银和铜，我们可以利用表面等离子体共振现象来增强被检测的信号。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-2 O3）中，它们成为壳隔离纳米颗粒（SHIN）。这允许利用金属纳米颗粒的增强效果，而不会对所研究的反应、过程或分子产生影响。SHINERS在使用过渡金属的催化过程的原位研究中显示出巨大的潜力，因为SHINs不会干扰该过程，因此可以提供对经常发生的复杂反应的深入了解。SHINERS还允许基于这些原因原位研究电化学过程。在这项研究中，金纳米粒子将被包裹在SiO2或Al 2 O3的惰性层中，通过拉曼光谱研究使用铂和铜的醛氢化的催化过程。这些壳隔离的金纳米颗粒也将用于研究电池电极上发生的过程和降解机制。这项研究将与Johnson-Matthey PLC合作进行。