Chapter 4. Dispersive Kinetics

Anodic Electrochromic Nickel Oxide Thin Films: Decay of Charge Density upon Extensive Electrochemical Cycling

“…Next we discuss how the above reaction schemes can give rise to the degradation kinetics observed in this study, that is, those given by the power‐law and stretched‐exponential expressions in Equations (1) and (2), respectively. These expressions arise naturally in the case of so‐called dispersive chemical kinetics, as discussed in several comprehensive review papers by Plonka . Dispersive kinetics occurs when the rate constants K 1 and K 2 are time‐dependent and given by power‐law functions [Eq.…”

“…The dynamics of charge density degradation is described in terms of power‐law and stretched‐exponential decay and is influenced by the Ni 3+ concentration. The underlying causes of these functions are explored within the framework of dispersive chemical reaction kinetics, which allows us to discuss microscopic mechanisms for the charge density evolution. Degradation of optical modulation is due to increased optical transmittance in both bleached and colored states, thus indicating a critical depletion of Ni 3+ sites.…”

4 Dispersive kinetics

“…In this situation the traditional theory of chemical kinetics breaks down and we enter the vast areas of dispersive kinetics. [4][5][6][7] In Section 2 some recent discussions on the basic concepts of kinetics and the common features of dispersive rate processes in condensed media are presented. Approximation of classical kinetics is discussed in Section 3.…”

Electrochromics for energy efficient buildings: Towards long-term durability and materials rejuvenation

“…We note that degradation and ageing phenomena often obey a "universal relaxation law" [48]. The specific case of dispersive chemical kinetics has been explored in a series of review papers by Plonka [49][50][51][52][53], which may give points of departure for elucidating Eq. (1).…”