Adavanced potentiostat-galvanostat-frequency response analyzer system

在Jerkiewicz团队中进行的表面和材料电化学研究需要先进的恒电位仪和集成的频率响应分析仪。所要求的仪器和现有的电化学石英晶体纳米天平以及电化学池和法拉第笼将产生互补的实验能力。该仪器将用于研究在金属电极上发生的下列电化学现象：(I)非手性/手性铂表面上非手性/前手性有机分子的电催化加氢的机理和动力学；(Ii)氢的欠电位沉积(UPD)和非手性/手性铂电极上的负离子吸附以及氢的生成的机理和动力学；(Iii)银和铜在铂(HKl)、Au(HKl)和Rh(HKl)电极上的UPD的热力学；(Iv)单层氧化物在铂(HKl)和Au(HKl)电极上生长的机理和动力学；以及(V)表面氧化物的水化程度。电化学阻抗数据将补充我们使用其他电化学、材料和表面科学技术获得的结果，如扫描电子显微镜、SAM、XPS和俄歇电子能谱。该系统的独特之处在于它能够进行各种电化学实验。意义我们对氢电化学、超薄金属层的沉积和过渡金属的电氧化的全面研究，包括实验和理论方法，将导致阐明电化学现象的重要和迄今未知的方面。对电催化氢化、金属层沉积和金属电氧化的认识对电催化、燃料电池、腐蚀科学和新兴的纳米结构材料电化学具有重要意义。

INSTRUMENT & RESEARCH PROGRAM DESCRIPTION Research in surface and materials electrochemistry conducted in Jerkiewicz's group requires an advanced potentiostat-galvanostat with an integrated frequency response analyzer. The requested instrumentation and the existing electrochemical quartz-crystal nano-balance together with electrochemical cells and Faraday cages will create complementary experimental capabilities. The instrument will be used to study the following electrochemical phenomena occurring at metallic electrodes: (i) mechanism and kinetics of electrocatalytic hydrogenation of achiral/prochiral organic molecules at achiral/chiral Pt surfaces; (ii) mechanism and kinetics of the under-potential deposition (UPD) of H and anon adsorption, and H2 generation at achiral/chiral Pt electrodes; (iii) thermodynamics of UPD of Ag and Cu on Pt(hkl), Au(hkl) and Rh(hkl) electrodes; (iv) mechanism and kinetics of the growth of monolayer oxides at Pt(hkl) and Au(hkl) electrodes; and (v) degree of hydration of surface oxides. The electrochemical impedance data will supplement our results obtained using other electrochemical, materials and surface-science techniques, such as SEM, SAM, XPS, and AES. The unique feature of the system is its ability to perform a variety of electrochemical experiments. SIGNIFICANCE Our comprehensive research on hydrogen electrochemistry, deposition of ultra-thin metallic layers, and electro-oxidation of transition metals, that comprises both experimental and theoretical methodologies, will result in the elucidation of important and hitherto unknown aspects of electrochemical phenomena. The understanding of electrocatalytic hydrogenation, deposition of metallic layers and electro-oxidation of metals is of importance to electrocatalysis, fuel-cells, corrosion science and the emerging electrochemistry of nano-structured materials.