cyclic voltammetry CV Although one of the more

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循環伏安法（cyclic voltammetry, CV） Although one of the more complex electrochemical techniques, cyclic voltammetry is

循環伏安法（cyclic voltammetry, CV） Although one of the more complex electrochemical techniques, cyclic voltammetry is very frequently used because it offers a wealth of experimental information and insights into both the kinetic and thermodynamic details of many chemical systems. 歐亞書局

the electron transfer at the working electrode surface the diffusion of analyte species to

the electron transfer at the working electrode surface the diffusion of analyte species to the electrode surface The rate of voltage change over time during each of these phases is known as the experiment's scan rate (V/s). The potential is applied between the working electrode and the reference electrode while the current is measured between the working electrode and the counter electrode. These data are plotted as current vs. applied potential. 歐亞書局

Experimental setup (a threeelectrode setup) The potential is applied between the working electrode and

Experimental setup (a threeelectrode setup) The potential is applied between the working electrode and the reference electrode while the current is measured between the working electrode and the counter electrode. At some point after the reduction potential of the analyte is reached, the cathodic current will decrease as the concentration of reducible analyte is depleted. 歐亞書局

l If the electron transfer at the working electrode surface is fast and the

l If the electron transfer at the working electrode surface is fast and the current is limited by the diffusion of analyte species to the electrode surface, then the peak current will be proportional to the square root of the scan rate. This relationship is described by the Cottrell equation. 歐亞書局

Applications l It is often used to study a variety of redox processes, to

Applications l It is often used to study a variety of redox processes, to determine the stability of reaction products, the presence of intermediates in redox reactions, reaction and electron transfer kinetics, and the reversibility of a reaction. l In the field of cellular biology, it is used to measure the concentrations of various chemicals in the cells of organisms, including living ones. 歐亞書局

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