Introduction I • Electrochemical methods are used • To investigate electron transfer processes and kinetics • To study redox processes in organic and organometallic chemistry • To investigate multi-electron transfer processes in biochemistry and macromolecular chemistry • To determine adsorption processes on surfaces • To determine electron transfer and reaction mechanisms • To determine of thermodynamic properties of solvated species Introduction II • Methods • Polarography: Often used mercury dropping electrodes because the drop is only used for one measurement and then discarded • Linear sweep voltammetry (LSV): the current at a working electrode is measured while the potential between ...
Cyclic Voltammetry: is an electrochemical technique used to measure the current that develops in an electrochemical cell when the voltage is varied. • The voltage applied is controlled by a potentiometer (you have to programme the potentiometer). • The potential is swept through a defined potential range over time (as shown by section 1 of the graph opposite). • This linear increase is known as ramping. • The scan rate is the time over which the potential is changing before returning to the original voltage, i.e. the time to complete one cycle. • The laptop will record current (I/amps) ...
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