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. 开发带有样品接口的无荧光测量紫外拉曼（248 nm）仪器。 2．在 bp.3 中探索拉曼应用的其他过程分析机会。水水解过程操作期间各种电极或电极涂层材料的拉曼显微镜原位电池的设计和构建4。结合替代电子显微镜和基于质谱的表征技术，探索选定电催化系统的催化剂降解、电极腐蚀和结垢。该博士项目旨在利用 248 nm 的新型激光技术开发拉曼光谱机会。美国宇航局最近在火星探测器上发射了一个最先进的例子（使用相同的激光），用于表征火星岩石样本。利用最近可用的紫外光学器件（例如光纤、滤波器（带通和陷波））以及对光谱的多元分析应用来优化这种新型光谱仪的灵敏度将提供强大的表征工具。 bp 感兴趣的几种应用已经被确定，例如荧光可能成为问题的机油和芳香族有机物的分析。对于这些应用，有必要开发静态池和流动池以与紫外拉曼系统配合使用。该项目的第二个主要目标是开发拉曼显微镜，用于制氢电催化电池的操作研究，以便对所涉及的过程有更详细的科学理解。许多先进的表征技术无法操作。开发用于在运行期间进行测量的定制表征系统是理解催化剂降解、电极腐蚀和污垢等挑战的重要进步。由于需要在不干扰正在观察的过程的情况下进行光学访问，因此现场或原位研究是​​一个真正的技术挑战。我们的团队与 Holmes 教授最近展示了直接甲醇燃料电池膜的实际研究的概念验证。拉曼显微镜（具有 785 nm 激发的雷尼绍 InVia 系统 - 此外，EPSRC 已申请资金用于 532 nm 激光器）将用于实现电催化反应中电极表面的二维化学表征。深度剖析也可以通过将激发激光的焦点改变到表面以下来实现，因此原则上可以进行化学成分的 3D 扫描。作为这项工作的一部分，还将探索其他最先进的拉曼技术，例如表面增强拉曼光谱（SERS）。由于激发光束与金属纳米粒子的耦合，这可以使信号增加几个数量级。对于项目的这一部分，与同事一起使用 UoM 和 bpICAM 提供的 XPS、SEM、TEM、SIMS 和 NMR 等其他先进表征技术探索类似系统将是有益的。