Spectroscopy, Structure, and Reactivity on Electrode Surfaces

电极表面的光谱、结构和反应性

• 批准号: 1309731
• 负责人: Andrew Gewirth
• 金额: $ 42万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-15 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1309731&HistoricalAwards=false
• 关键词: Spectroscopy; Structure; Reactivity; Electrode; Surfaces

Professor Andrew A. Gewirth and his students at the University of Illinois at Urbana-Champaign are supported by the Chemical Measurements & Imaging (CMI) Program in the Division of Chemistry to develop new tools to examine the reactivity associated with different types of electrode processes. Featured in this work is the use of advanced Raman and electrochemical surface stress measurements to interrogate electrode composition and reactivity during electrocatalytic events. The processes slated for investigation include the catalysis of nitrate reduction on bare and bimetallic electrode surfaces, carbon dioxide reduction on modified surfaces, especially those involving Ag, and the oxygen evolution reaction. The group also plans to investigate hydrocarbon oxidation catalysis using non-stoichiometric oxides. Electrocatalysts are substances that promote electrochemical reactions so that they occur more quickly, efficiently or under milder conditions. Electrochemical reactions are those that proceed with electron transfer, such as the burning of fuel and the plating of metals. Many important natural and technological processes such as corrosion, deposition, remediation and energy storage involve electrochemical reactions and therefore can be improved by advances in electrocatalyst technology. The studies that will be conducted in this project will advance electrocatalyst technology by developing tools that can reveal how electrocatalysts influence the structure and behavior of chemicals involved in electrochemical reactions. The project will include focus on understanding the electrocatalysis of reactions that impact pressing societal needs, such as the reduction of nitrate and carbon dioxide, ubiquitous products of agricultural and industrial activity, respectively and the oxidation of hydrocarbon fuels and water. This work also serves as a vehicle for interdisciplinary research training. Students from many backgrounds, including those underrepresented in science, will be mentored, and hands-on science and chemical demonstrations will be performed in local schools.

Andrew A. Gewolth和他在伊利诺伊大学厄巴纳-香槟分校的学生得到了化学系化学测量成像（CMI）计划的支持，以开发新的工具来检查与不同类型的电极过程相关的反应性。在这项工作中的特点是使用先进的拉曼和电化学表面应力测量询问电极的组成和反应性在电催化事件。预定用于调查的过程包括硝酸盐还原的催化作用在裸露的电极表面上，二氧化碳还原在改性的表面上，特别是那些涉及银，和析氧反应。 该小组还计划研究使用非化学计量氧化物的烃氧化催化。电催化剂是促进电化学反应的物质，使它们更快，更有效或在更温和的条件下发生。 电化学反应是指伴随着电子转移而进行的反应，例如燃料燃烧和金属电镀。 许多重要的自然和技术过程，如腐蚀，沉积，修复和能量储存涉及电化学反应，因此可以通过电催化剂技术的进步来改善。 该项目将进行的研究将通过开发工具来推进电催化剂技术，这些工具可以揭示电催化剂如何影响电化学反应中所涉及的化学品的结构和行为。 该项目将侧重于了解影响紧迫社会需求的反应的电催化，例如硝酸盐和二氧化碳的减少，农业和工业活动的普遍产品，以及碳氢化合物燃料和水的氧化。 这项工作也是跨学科研究培训的工具。 来自许多背景的学生，包括那些在科学方面代表性不足的学生，将得到指导，并将在当地学校进行动手科学和化学演示。