Temporally and Spatially Resolved Electrochemical Infrared Spectroscopy

时空分辨电化学红外光谱

基本信息

批准号：
RGPIN-2014-05157
负责人：
Burgess, Ian
金额：
$ 3.93万
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：
2017
资助国家：
加拿大
起止时间：
2017-01-01 至 2018-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632460
关键词：
Temporally Spatially Resolved Electrochemical Infrared

项目摘要

Electrochemistry is of great value and importance to human activity and the global economy. For example, electrical power sources including batteries, dye-sensitized solar cells, fuels cells and supercapacitors all require electrochemical processes to generate electricity. Furthermore, many industrial practices rely on electrocatalytic transformations to manufacture valuable commodity chemicals and materials. Fundamental studies that lead to better understanding and more efficient means to perform electrochemical reactions would be of great societal benefit as it is estimated that electrochemical activities consume about 10% of the world’s electrical energy. Information pertaining to commercially important reaction mechanisms has traditionally been inferred from techniques that measure electrical characteristics (e.g. current- voltage relationships). A deficiency of using purely electrical methods to study electrochemical reactions is the lack of chemical sensitivity they provide and for this reason spectroscopy (the interaction of electromagnetic radiation with atoms and molecules) can be combined with traditional methods to gain molecular-level information. This research program seeks to learn new information about electrochemical reactions through the coupling of traditional electrochemical techniques with advanced infrared (IR) spectroscopy techniques. Our proposed research aims to create surfaces that amplify the IR signal from a very small number of molecules by many orders of magnitude so that we can measure and quantify what chemical species and reactions occur during electrochemical transformations such as the oxidation of fuels in fuel cells. For example, we are proposing to use the unique properties of IR radiation generated at Canada’s only synchrotron facility (the Canadian Light Source located in Saskatoon, SK) to follow the fate of molecules on the time scale of 1/100,000 of a second. This information is very important as the performance of electrocatalytic materials can be adversely affected by very short-lived intermediates. Identifying which intermediates exist and the distribution of the final products of electrochemical reactions will allow us to assess the performance of existing electrocatalytic materials and help design new and improved materials for more efficient electrochemical reactions.

电化学是人类活动和全球经济。据估计，耐受化学激活的效果大约是世界上重要的机制。带有分子的电磁辐射可以与传统的方法相结合，以获取分子级信息。来自非常小的nulecules的信号可以测量我们可以测量的，并且在电化学转化期间出现wowa tchemical物种和反应，例如燃料中燃料中的氧化作用，我们是加拿大唯一的IR辐射的独特特性。，SK遵循1/100,000秒的时间尺度的分子的命运，因为电催化材料的性能可以通过非常短的矿物质来表现出来。 MAT RIALS并有助于设计新的和改进的材料，以进行更有效的电化学反应。