Adavanced potentiostat-galvanostat-frequency response analyzer system

Jerkiewicz的研究小组进行的表面和材料电化学研究需要一台先进的恒电位仪-恒电流仪，并配有集成频率响应分析仪。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电池和法拉第笼将形成互补的实验能力。该仪器将用于研究金属电极上发生的以下电化学现象：（i）非手性/前手性有机分子在非手性/手性Pt表面的电催化氢化机理和动力学;（ii）H和阴离子吸附的欠电位沉积（UPD）机理和动力学;（iii）Ag和Cu在Pt（hkl）、Au（hkl）和Rh（hkl）电极上的UPD热力学;（iv）Pt（hkl）和Au（hkl）电极上单层氧化物生长的机理和动力学;以及（v）表面氧化物的水合程度。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，如SEM，SAM，XPS和AES获得的结果。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综合研究，包括实验和理论方法，将导致电化学现象的重要和迄今未知的方面的阐明。对电催化氢化、金属层沉积和金属电氧化的理解对于电催化、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.