Nanogap Electrochemistry of Adsorption-Coupled Electron Transfer

在化学测量和成像项目资助的这个项目中，匹兹堡大学的Shigeru Amemiya教授正在开发新的电化学方法，允许在新型纳米尺寸电极上单独研究电子转移和耦合吸附事件。该项目由化学测量和成像项目资助，化学结构、动力学和机理a项目共同资助。该项目的重点是深入了解吸附耦合电子转移，这在许多电化学能源设备中起着至关重要的作用，如燃料电池、电池、太阳能电池和超级电容器。由于创造了新的研究工具，速率和能量参数的可靠确定成为可能。来自代表性不足群体的学生在研究和本科实验室环境中获得跨学科培训，因为他们参与了交叉研究。本项目专注于吸附耦合电子转移的定量研究，这是电化学技术跨越电催化、电沉积和电分析的关键步骤。在Amemiya实验室开发的新的纳米电化学方法为动力学解析吸附耦合电子转移到其基本步骤提供了机会。具体来说，扫描电化学显微镜的纳米间隙伏安法提供了一种单独确定球内外电子转移、表面吸附甚至耦合化学反应动力学的途径。由于Amemiya教授的研究小组开发的新方法，可以通过使用清洁电极来保持空气和溶液中的真空级表面清洁度，从而获得可靠的反应参数。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

In this project funded by the Chemical Measurement and Imaging Program, with co-funding from the Chemical Structure, Dynamics, and Mechanisms-A Program, of the Division of Chemistry, Professor Shigeru Amemiya of the University of Pittsburgh is developing new electrochemical methods that allow for the separate study of electron transfer and coupled adsorption events at novel nanometer-sized electrodes. This project focuses on gaining an advanced understanding of adsorption-coupled electron transfer, which plays a vital role in numerous electrochemical energy devices, such as fuel cells, batteries, solar cells, and supercapacitors. Reliable determination of rate and energy parameters is possible due to the creation of new research tools. Students from underrepresented groups gain interdisciplinary training in the research and undergraduate laboratory environments, as a result of their participating in cross-cutting research. This project is focused on the quantitative study of adsorption-coupled electron transfer as the key step of electrochemical technologies that span electrocatalysis, electrodeposition, and electroanalysis. New nanoelectrochemical methods developed in the Amemiya laboratory provide an opportunity to kinetically resolve adsorption-coupled electron transfer into its elementary steps. Specifically, nanogap voltammetry with a scanning electrochemical microscope affords a path to separately determine the dynamics of inner-sphere and outer-sphere electron transfer, surface adsorption, and even coupled chemical reactions. Reliable reaction parameters can be obtained by employing clean electrodes that maintain vacuum-level surface cleanliness in air and solution, as a result of new methods developed by Professor Amemiya's research group.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.