I am trying to analyze the electrochemical behavior of FeCl3. The CV of FeCl3 indicated a reduction peak current at 0.08V. So what values of potential should I take as initial and high potential values for chronoamperometry? I am considering only 1 step of chronoamperometry.
Potential (E) is the amount of electrical force or energy in a system. As the potential increases, more force is available to make a reaction happen. The base unit for potential is the volt (V). Current (I) is the magnitude of the electron flow in a system. Its base unit is amperes (A) (often shortened to amps), but most electrochemical experiments measure currents on the microamp (10-6 A) or nanoamp (10-9 A) scale. Cathodic i is due to a reduction. Anodic i is due to an oxidation. Charge (Q) is a measure of the number of electrons used per equivalent. Its base unit is the coulomb (C). You can measure charge directly or calculate it by multiplying the current and the time. The different combinations of parameters and working electrode types make for a long list of techniques, including voltammetry, polarography, cyclic voltammetry, linear sweep techniques, chronoamperometry, chronopotentiometry, pulsed techniques and others. (For more information on pulsed techniques please see PAR Application Note P-2.) Many researchers are uncomfortable with electrochemical techniques because of this seemingly endless list. In fact, since only four parameters are measured, electrochemical techniques are relatively simple and most can be done with one instrument. The remainder of this application note will introduce and define the more commonly used techniques.Chronoamperometry (CA), another commonly used electroanalytical technique, is a useful tool for determining diffusion coefficients and for investigating kinetics and mechanisms. Unlike the CV technique, CA can yield this information in a single experiment. Moreover, you can run multiple experiments to further characterize the system.When a potential step large enough to cause an electrochemical reaction is applied to an electrode, the current changes with time. The study of this current response as a function of time is called Chronoamperometry (CA)..
Thank you so much. However I wanted to understand that the ideal chronoamperometric behaviour should be of an exponentially decaying form. In case, it exhibits a sudden rising peak followed by exponential decay, does it indicate any error in my system?
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