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The two major classes of voltammetric technique

As noted above, the time element, which is critical for kinetic studies, may be introduced in two ways. [Pg.4]

In this form of voltammetry, the concentration distributions of each species in the electrode reaction mechanism are temporally invariant at each applied potential. This condition applies to a good approximation despite various processes still occurring such as mass transport (e.g. diffusion), heterogeneous electron transfer and homogeneous chemical processes. Theoretically it takes an infinite time to reach the steady state. Thus, in a practical sense steady-state voltammetric experiments are conducted under conditions that approach sufficiently close to the true steady state that the experimental uncertainty of the steady-state value of the parameter being probed (e.g. electrode current) is greater than that associated with not fully reaching the steady state. The [Pg.4]

Homogeneous reactions coupled to electron transfer Photoelectrochemical [Pg.5]

Quantitative determination of trace species in solution Transfer of species between immiscible phases Adsorption/desorption/ deposition [Pg.5]

Reduction of pyridine and benzene-substituted n-alkyl esters (Webster et ai, 1996). For further examples refer to texts such as Pombeiro and McCleverty (1993) [Pg.5]


The two major classes of voltammetric technique 4 Evaluation of reaction mechanisms 6 General concepts of voltammetry 6 Electrodes roles and experimental considerations 8 The overall electrochemical cell experimental considerations 12 Presentation of voltammetric data 14 Faradaic and non-Faradaic currents 15 Electrode processes 17 Electron transfer 22 Homogeneous chemical kinetics 22 Electrochemical and chemical reversibility 25 Cyclic voltammetry 27 A basic description 27 Simple electron-transfer processes 29 Mechanistic examples 35... [Pg.1]


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