Advanced Infrared Spectroscopy and Imaging of Electrochemical and Chemical Reactions

电化学和化学反应的先进红外光谱和成像

• 批准号: RGPIN-2019-04032
• 负责人: Burgess, Ian
• 金额: $ 3.5万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=713893
• 关键词: Advanced; Infrared; Spectroscopy; Imaging; Electrochemical

The long-term objective of this on-going research program is generation of new scientific understanding of electrochemical interfaces and reactions through the development of advanced infrared spectroscopy and imaging capabilities. Modern society requires ever increasingly efficient means to chemically store, generate and utilize electricity for anthropogenic activity. Practical applications include batteries, fuel cells, electrochemical processing and metal recovery. At the fundamental level, all of these processes involve one or more interfaces where electric fields drive electronic, molecular and ionic redistributions integral to underlying physical and chemical manipulations. Despite the importance of these interfaces, much remains unknown about the structure of the chemical species that comprise a dynamic electrochemical surface such as a solid electrode immersed in a solution. Extracting key levels of understanding requires application of in situ techniques that provide information on the molecular level. This research program seeks to both advance the sensitivity of a class of such techniques (surface enhanced vibrational spectroscopy) and exploit improved methodologies to create new knowledge of electrochemical interfaces. For example, we are exploring the fundamentals of light-matter interactions to understand how to produce interfaces capable of providing discernible signals from very small numbers of molecules using surface enhanced vibrational spectroscopy. We also use unique sources of infrared radiation generated at Canada's only synchrotron facility (the Canadian Light Source located in Saskatoon, Saskatchewan) to follow the fate of molecules at electrode surfaces on the time scale of 1/100,000 of a second. Our methodological advances not only spur greater capabilities for fundamental studies of electrified interfaces but also introduce improved capabilities for chemical sensing and molecular recognition.

这项正在进行的研究计划的长期目标是通过开发先进的红外光谱和成像能力，对电化学界面和反应产生新的科学认识。现代社会需要越来越有效的手段来化学储存、发电和利用电力进行人类活动。实际应用包括电池、燃料电池、电化学加工和金属回收。从根本上讲，所有这些过程都涉及一个或多个界面，其中电场驱动电子、分子和离子重新分布，这是基础物理和化学操作不可或缺的一部分。尽管这些界面很重要，但关于构成动态电化学表面（例如浸入溶液中的固体电极）的化学物质的结构仍然未知。提取关键水平的理解需要应用提供分子水平信息的原位技术。该研究项目旨在提高此类技术（表面增强振动光谱）的灵敏度，并利用改进的方法来创建电化学界面的新知识。例如，我们正在探索光与物质相互作用的基础原理，以了解如何产生能够使用表面增强振动光谱从极少数分子提供可辨别信号的界面。我们还使用加拿大唯一的同步加速器设施（位于萨斯喀彻温省萨斯卡通的加拿大光源）产生的独特红外辐射源，以 1/100,000 秒的时间尺度跟踪电极表面分子的命运。我们的方法论进步不仅激发了电气化界面基础研究的更大能力，而且还提高了化学传感和分子识别的能力。