Kinetic redox

Tracing a kinetic redox path is a matter of redistributing mass among the basis entries, adding mass, for example, to oxidized basis entries at the expense of reduced entries. The stoichiometry of the mass transfer is given by the kinetic reaction 17.3, and the transfer rate is determined by the associated rate law (Eqn. 17.9, 17.12, or 17.21). 

Comparing the development here to the accounting for the kinetics of mineral precipitation and dissolution presented in the previous chapter (Chapter 16), we see the mass transfer coefficients v and so on serve a function parallel to the coefficients v , etc., in Reaction 16.1. The rates of change in the mole number of each basis entry, accounting for the effect of each kinetic redox reaction carried in the simulation, for example,... 

Su C., Puls R.W., Arsenate and arsenite removal by zero-valent iron kinetics, redox transformation, and implications for in situ groundwater remediation, Environ. Sci. Technol. 35,2001, 1487-1992. 

S. U. M. Khan, P. Wright, and J. O M. Bockris, Elektrokhimya 13 914 (1977). The first application of time-dependent perturbation theory to quantum electrode kinetics redox reactions. 

Kinetic redox models, as formulated by Mars and van Krevelen [204], have not been considered in any recent work. Although the combined dependence on both propene and oxygen pressures does arise in certain investigations, the authors seem to ignore redox mechanisms completely and correlate their data with Langmuir—Hinshelwood type models. 

Alfred Werner studied the "strengthening of the primary valence force by the saturation of the secondary valence force," but he failed to explain fully this phenomenon. To elucidate the stabilization of unstable oxidation states by complex formation two aspects should be taken into account the thermodynamic stability of complexes and their kinetic redox lability. Such factors as ligand field stabilization energy for M" and and the geometry of the donor atoms spatial orientation also affects the stability of a given oxidation state. Macrocyclic ligands are especially suitable for the stabilization of unstable metal oxidation states, both from the thermodynamic and kinetic viewpoints. 

Kinetic redox potentials for M+/M + couples of a number of metal ions have been determined from a study of the percental efficiency of the electron-transfer reactions with various electron acceptors A ... 

The EIS technique was used to probe the kinetics, redox, and structural features of the surface confined species. [Fe/CN) " ] was used as redox probe for lES studies. 

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