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发展先进的红外光谱和成像能力来产生对电化学界面和反应的新科学理解。现代社会需要越来越有效的手段来化学储存，产生和利用电力进行人为活动。实际应用包括电池，燃料电池，电化学处理和金属回收。在基本层面上，所有这些过程涉及一个或多个接口，其中电场驱动电子，分子和离子重新分布与潜在的物理和化学操作不可或缺的组成部分。尽管这些界面很重要，但对于包含动态电化学表面的化学物种的结构，例如浸入溶液中的固体电极。提取关键的理解水平需要应用原位技术，以提供有关分子水平的信息。该研究计划旨在提高一类此类技术（表面增强的振动光谱）的敏感性，并利用改进的方法来创造对电化学接口的新知识。例如，我们正在探索光 - 物质相互作用的基本原理，以了解如何使用表面增强的振动光谱法提供能够从少量分子提供可辨别信号的界面。我们还使用在加拿大唯一的同步器设施（位于萨斯喀彻温省萨斯卡通的加拿大光源）生成的独特的红外辐射来源，以在电极表面的分子命运下在一秒钟的1/100,000的时间尺度上遵循分子的命运。我们的方法论进步不仅促进了对电气界面的基本研究的更大能力，而且还提高了化学传感和分子识别的提高能力。