Analytical and Mechanistic Studies in Electrochemistry

电化学分析和机理研究

• 批准号: 0347471
• 负责人: Dennis Evans
• 金额: $ 56.3万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-02-15 至 2008-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0347471&HistoricalAwards=false
• 关键词: Analytical; Mechanistic; Studies; Electrochemistry

Professor Dennis Evans and his research group will investigate two-electron transfer reactions focusing on phenomena associated with the second electron transfer step. Reactions that involve concerted electron and proton transfer (CEPT) will be of special interest. Requirements for the CEPT mechanism including kinetic barriers and the acid-base properties of reactants and products will be investigated. Dioxygen reduction, which has great relevance to life processes and technological importance through its role in corrosion and fuel cell function, will be among the systems selected for detailed study. Reactions that involve potential inversion, the phenomenon where the insertion or removal of the second electron in a two electron process occurs more easily than does removal of the first electron, will also be studied as part of the major thrust of the project. Related applied work involving electrochemical generation of bases for use as reagents in base-catalyzed synthetic reactions is also being undertaken. This research will develop fundamental understanding of multi-electron-transfer reactions. Modern electrochemical methodology will be employed. Outcomes will be highly relevant to a wide range of areas. Processes that affect biological systems, energy production, and synthesis of high value chemicals are a few examples.

丹尼斯·埃文斯教授和他的研究小组将研究双电子转移反应，重点关注与第二个电子转移步骤相关的现象。 涉及协同电子和质子转移（CEPT）的反应将受到特别关注。 将研究 CEPT 机制的要求，包括动力学势垒以及反应物和产物的酸碱性质。 分子氧还原通过其在腐蚀和燃料电池功能中的作用与生命过程和技术重要性密切相关，将被选为详细研究的系统之一。 涉及电位反转的反应，即双电子过程中第二个电子的插入或移除比第一个电子的移除更容易发生的现象，也将作为该项目主要推动力的一部分进行研究。 涉及电化学生成碱以用作碱催化合成反应中的试剂的相关应用工作也在进行中。 这项研究将加深对多电子转移反应的基本理解。将采用现代电化学方法。 结果将与广泛的领域高度相关。 影响生物系统、能源生产和高价值化学品合成的过程就是几个例子。