Catalysis, Adsorption and Charge Transfer Kinetics in Reactions at Electrodes

9312091安森这个项目是在分析和表面化学的一般领域和电化学的子领域。 在这个为期五年的持续资助任期内，安森教授和他的学生将设计，合成和评估新的表面限制的电催化剂的直接，四电子还原的分子氧水和有机底物，如甲醇，乙醇，甲醛和甲酸的电氧化。 本课程也将探讨吸附的电活性配位体及其金属配合物的电催化的普遍适用性。 由于许多电催化物种的表面限制使用聚合物基体，溶液组成控制的热力学驱动力的影响，电子转移的动力学跨越聚合物-电解质界面也将进行研究。 最后，亚稳态过渡金属-分子氧络合物的电化学行为，长期以来被认为是分子氧电催化还原的关键中间体，将被探讨，以深入了解这些过渡金属促进的过程的机制。 高效、经济的燃料电池和蓄电池的合理设计是基于对所涉及的电化学过程的基本理解。 这项研究的目的是提高知识如何廉价的底物分子的电化学转化可以通过电催化促进在这些技术和社会上重要的设备中使用。 ***

9312091 Anson This project is in the general area of analytical and surface chemistry and in the subfield of electrochemistry. During the tenure of this five-year continuing grant, Professor Anson and his students will design, synthesize, and evaluate new surface confined electrocatalysts for the direct, four-electron reduction of dioxygen to water and for the electrooxidation of organic substrates such as methanol, ethanol, formaldehyde, and formic acid. The general applicability of electrocatalysis by adsorbed electroactive ligands and their metal complexes will also be explored. Because many electrocatalytic species are surface confined using polymeric matrices, the impact of solution composition-controlled thermodynamic driving forces on the kinetics of electron transfer across polymer-electrolyte interfaces will also be investigated. Finally, the electrochemical behavior of metastable transition metal-dioxygen complexes, long believed to be key intermediates in the electrocatalytic reduction of dioxygen, will be probed to afford insights into the mechanisms of these transition metal-promoted processes. %%% The rational design of efficient, economical fuel cells and batteries is predicated on a fundamental understanding of the electrochemical processes involved. This research is aimed at enhancing knowledge of how electrochemical transformations of inexpensive substrate molecules can be facilitated through electrocatalysis for use in these technologically and societally important devices. ***