单晶电极/非水体系界面的现场表面增强拉曼光谱研究

项目名称： 单晶电极/非水体系界面的现场表面增强拉曼光谱研究

项目编号： No.21303115

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 徐敏敏

作者单位： 苏州大学

项目金额： 25万元

中文摘要： 非水溶剂/金属单晶界面结构的研究对于相关模型的建立，及从晶面结构层次探索表面吸附过程和反应活性等具有重要的理论意义和应用价值。本项目拟采用电化学结合壳层隔绝纳米粒子增强拉曼光谱（SHINERS）技术，通过构建非水体系电化学光谱联用研究平台，结合以模型分子和在单晶表面具有电催化反应活性的功能分子为探针，现场研究单晶金属电极/非水溶剂界面上的电化学行为。考察晶面结构、非水溶剂种类和电极电位等影响，提出单晶电极表面上的增强拉曼光谱选律，建立非水体系金属单晶的电化学界面结构模型，探索非水体系中单晶金属表面反应机理，并将电极界面功能分子反应活性与单晶的结构进行有效关联，为非水体系中界面反应的理论研究和实际应用提供有力的实验依据，将SHINERS技术发展为研究非水体系中金属单晶电极表面过程的高灵敏度方法之一。

中文关键词： 壳层隔绝纳米粒子增强拉曼光谱；金属单晶电极；非水体系；界面结构；电化学

英文摘要： The investigations on the structure and reaction processes at single crystal metal/nonaqueous solution interfaces provide the theoretical and practical application basis for exploring the surface adsorption and properties. Shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) combined with electrochemical technique is employed to study the interfacial processes at single crystal metal electrode. The comprehensive platform of electrochemical and spectroscopic measurements will be established for the relevant studies in nonaqueous systems. The model and the functional molecules with electrocatalytic activity are served as probes for investigation on in-situ electrochemical behaviors at single crystal metal electrode/nonaqueous system interfaces. The influences of the surface structure, the types of nonaqueous solvents, and potentials are also intensely studied. In addition, the Raman enhancement surface selection rules for the single crystal metal will be analyzed. The interfacial structure model of single crystal metal electrode will be provided as well as the surface reaction mechanisms. Based on the above studies, the association between the surface structure of single crystal electrode and its adsorption/reaction properties are achieved for providing the experimental basis of fundmental studies a

英文关键词： Shell-isolated Raman spectroscopy；Metal single crystal electrode；Nonaqueous system；interfacial structure；electrochemistry