Adavanced potentiostat-galvanostat-frequency response analyzer system

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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.