In situ Spectroscopic Studies of the Electrochemistry of Nitrogen and Sulfur Oxides

凯斯西储大学的Daniel A.Scherson教授在化学系分析和表面化学计划的支持下，研究了与水溶液中氮和硫氧化物及其氧阴离子的还原和氧化有关的非均相氧化还原反应的机理，以及与能量转换和电合成相关的其他氧化还原活性物种。特别关注了这些反应中不可逆吸附的电催化剂的原位静态和动态表征，以及选定的裸露和原子修饰的单晶金属表面的微地形对吸附中间体性质和其他界面性质的影响。通过耦合微电极、电荷注入和一系列基于显微镜的互补光谱技术，包括紫外可见反射光谱、共振和表面增强拉曼光谱以及二次谐波产生，将获得对这些问题的深入了解。这项工作的成功将为将原位光谱电化学技术扩展到纳秒范围提供一种手段，使人们能够研究与各种其他领域相关的电子转移事件的动态方面，包括电催化、多相催化、腐蚀、传感器和环境科学。参与这项研究的学生将接受广泛的基础和应用学科培训，并将在印度中央电化学研究所接触到国际研究经验。

Professor Daniel A. Scherson of Case Western Reserve University is supported by the Analytical and Surface Chemistry Program in the Division of Chemistry to investigate the mechanism of heterogeneous redox reactions associated with the reduction and oxidation of nitrogen and sulfur oxides and their oxyanions in aqueous electrolytes, as well as other redox active species of relevance to energy conversion and electrosynthesis. Special focus is on the in situ static and dynamic characterization of irreversibly adsorbed electrocatalysts for these reactions, as well as the effect of the microtopography of selected bare and atom-modified single crystal metal surfaces on the nature of adsorbed intermediates and other interfacial properties. Insight into these issues will be gained from coupling of microelectrodes, charge injection, and an array of complementary microscope-based spectroscopic techniques, including UV visible reflection spectroscopy, resonance and surface enhanced Raman spectroscopies and second harmonic generation. The success of this work would provide a means for extending in situ spectroelectrochemical techniques into the nanosecond range, allowing the study of the dynamic aspects of electron transfer events of relevance to a variety of other fields, including electrocatalysis, heterogeneous catalysis, corrosion, sensors, and environmental science. Students involved in this research will be trained in a broad range of fundamental and applied disciplines, and will be exposed to an international research experience at the Central Electrochemical Research Institute in India.