Operando Studies of Electrocatalysis for Hydrogen Production Using Pioneering Vibrational Spectroscopic Techniques

使用开创性振动光谱技术进行电催化制氢的操作研究

• 批准号: 2860036
• 金额: --
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2860036
• 关键词: Operando; Studies; Electrocatalysis; Hydrogen; Production

1. Development of UV Raman (248 nm) instrument for fluorescence free measurements with sample interface.2. Explore additional process analytical opportunities for Raman applications within bp.3. Design and construction of in situ cell for Raman microscopy of various electrodes or electrode coating materials during operation for water hydrolysis processes4. Exploration of catalyst degradation, electrode corrosion and fouling of selected electrocatalytic systems in combination with alternative electron microscopy and mass spectrometry- based characterisation techniques.This PhD project aims to develop the Raman spectroscopy opportunities with new laser technology at 248 nm. A recent state-of-art example of this (with the same laser) was launched by NASA on the Mars rover for characterisation of Martian rock samples. Optimising the sensitivity of this novel spectrometer with recently available uv optics such as fibre optics, filters (band-pass and notch) as well as the application of multivariate analysis to the spectra will provide a powerful characterisation tool. Several applications of bp interest have already been identified such as the analysis of motor oils and aromatic organics where fluorescence can be a problem. For these applications it will be necessary to develop both static and flow cells for use with the UV Raman system. The second main aim of the project is the development of Raman microscopy for in operando studies of electrocatalytic cells for hydrogen production in order to develop a more detailed scientific understanding of the processes involved. Many advanced characterisation techniques cannot operate in operando. The development of bespoke characterisation systems to measure during operation is an important advance to understanding the challenges such as catalyst degradation, electrode corrosion and fouling. In operando or in situ studies are a real technical challenge due to the requirements for optical access without disturbing the processes being observed. Our group, with Prof Holmes, have recently demonstrated a proof of concept for the in operando study of direct methanol fuel cell membranes. Raman microscopy (Renishaw InVia system with 785 nm excitation - additionally, funding has been applied from EPSRC for a 532 nm laser) will be used to enable 2D chemical characterisation of the electrode surface in the electrocatalytic reactions. Depth profiling can be also achieved by varying the focus of the excitation laser to below the surface so in principle 3D scans of chemical composition can be made. Other state of the art Raman techniques such as surface enhanced Raman spectroscopy (SERS) will also be explored as part of this work. This can give several orders of magnitude signal increase due to coupling of the excitation beam with metal nano-particles. For this part of the project it will be beneficial to explore similar systems with other advanced characterisation techniques such as XPS, SEM, TEM, SIMS and NMR available at UoM and bpICAM with colleagues.

1。使用样品接口的紫外拉曼（248 nm）仪器的开发。2。探索BP.3中拉曼应用程序的其他过程分析机会。在操作过程中，用于水解过程中各种电极或电极涂料材料的拉曼显微镜的原位细胞的设计和构建4。探索催化剂降解，电极腐蚀和选定的电催化系统结合替代电子显微镜和基于质谱 - 基于质谱的特征技术的探索。该博士学位项目旨在开发Raman光谱机会与248 NM的新激光技术开发Raman光谱机会。 NASA在火星漫游车上发起了最新的最新例子（具有相同激光），以表征火星岩石样品。通过最近可用的UV光学元件（例如光纤，过滤器（频道和凹槽））以及将多元分析应用于光谱，优化了这种新型光谱仪的灵敏度，将提供一个强大的表征工具。已经确定了BP兴趣的几种应用，例如对荧光可能是问题的机油和芳香有机物的分析。对于这些应用，有必要同时开发静态和流动单元，以与紫外线拉曼系统一起使用。该项目的第二个主要目的是开发拉曼显微镜用于用于氢生产的电催化细胞的操作研究，以便对所涉及的过程有更详细的科学理解。许多先进的特征技术无法在Operando中运行。在操作过程中测量定制表征系统的开发是理解诸如催化剂降解，电极腐蚀和结垢等挑战的重要进步。在Operando或原位研究中，由于对光学访问的要求而不干扰观察到的过程，因此是一个真正的技术挑战。我们的小组与福尔摩斯教授一起最近证明了直接甲醇燃料电池膜的操作研究概念证明。拉曼显微镜（具有785 nm激发的Renishaw Invia系统 - 此外，将使用EPSRC进行资金用于532 nm激光器）将用于启用电催化反应中电极表面的2D化学表征。还可以通过将激发激光器的焦点变为表面下方，从而实现深度分析，从而使化学组成的原理3D扫描。这项工作的一部分也将探索其他最先进的拉曼技术，例如表面增强的拉曼光谱（SER）。由于激发梁与金属纳米粒子的耦合，这可以给出几个数量级信号的增加。对于该项目的这一部分，探索具有其他高级特征技术（例如XPS，SEM，TEM，SIMS和NMR）的类似系统将是有益的，该系统可在UOM和BPICAM带有​​同事提供。