The Electrochemistry of Nitrogen and Sulfur Oxides: In situ Spectroscopic Studies

氮氧化物和硫氧化物的电化学：原位光谱研究

• 批准号: 0616800
• 负责人: Daniel Scherson
• 金额: $ 40.5万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0616800&HistoricalAwards=false
• 关键词: Electrochemistry; Nitrogen; Sulfur; Oxides; situ

ABSTRACT CHE-0616800Scherson/Case Western ReserveWith the support from the Analytical and Surface Chemistry Program, Professor Daniel Scherson and his group in the Department of Chemistry at Case Western Reserve University explore aspects of interfacial structure that control the dynamics of heterogeneous oxidation and reduction of nitrogen and sulfur oxides and oxyanions in aqueous electrolytes. They develop and implement in situ spectroscopic techniques that enable direct probing of chemical processes at metal-solution interfaces. Methods include resonance and surface enhanced Raman, ultraviolet-visible normalized differential reflectance, and second harmonic generation. Attention is focused on the binding and reactivity of small nitrogen- and sulfur-containing molecules to metal surfaces of well defined microtopography, either bare or modified by transition metal macrocycles. An important thrust of the project involves the development of strategies for monitoring interfacial dynamics with high spatial resolution and temporal resolution down to the sub-microsecond scale. Implementation of dual beam coincidence tactics provides specificity for detection of two or more species adsorbed on single surface. Information obtained from this project improves our fundamental understanding of chemical reactions, including formation and dissociation of chemical bonds involving molecular and ionic forms of nitrogen and sulfur oxides. Interest in this class of compounds spans a wide variety of disciplines, ranging from atmospheric sciences and toxicology to catalysis and neurobiology. As a result, students involved in this research are exposed to a broad range of both fundamental and applied disciplines, and become well suited to face the challenges posed by a multitude of yet unresolved highly interdisciplinary problem areas, particularly those related to nanoscience, medicine and biotechnology. Close links with Hathaway Brown, a private women's K-12 institution in the Cleveland area, allows extension of these research opportunities to high school students.

摘要 CHE-0616800Scherson/凯斯西储在分析和表面化学项目的支持下，凯斯西储大学化学系的 Daniel Scherson 教授和他的团队探索了控制水电解质中氮氧化物、硫氧化物和氧阴离子非均相氧化和还原动力学的界面结构的各个方面。 他们开发并实施了原位光谱技术，能够直接探测金属溶液界面的化学过程。 方法包括共振和表面增强拉曼、紫外-可见归一化微分反射和二次谐波生成。 人们的注意力集中在含氮和硫的小分子与具有明确微形貌的金属表面（裸露的或被过渡金属大环修饰的金属表面）的结合和反应性上。 该项目的一个重要推动力涉及开发以高空间分辨率和低至亚微秒尺度的时间分辨率监测界面动力学的策略。 双光束重合策略的实施为检测单个表面上吸附的两种或多种物质提供了特异性。 从该项目获得的信息提高了我们对化学反应的基本理解，包括涉及氮氧化物和硫氧化物的分子和离子形式的化学键的形成和解离。 对此类化合物的兴趣涉及各个学科，从大气科学和毒理学到催化和神经生物学。 因此，参与这项研究的学生接触到广泛的基础和应用学科，并非常适合面对许多尚未解决的高度跨学科问题领域所带来的挑战，特别是与纳米科学、医学和生物技术相关的问题领域。 与克利夫兰地区私立女子 K-12 机构 Hathaway Brown 的密切联系，使这些研究机会扩展到高中生。