Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 147, Issue 8, Pages 3029-3035Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1393643
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The impact of surface inhomogeneities on diffusion kinetics in solids is investigated by assuming that the exchange of the diffusing species takes place at active spots or stripes only. Finite element simulations are analyzed on the basis of analytical approximations. Such lateral inhomogeneities lead to an apparent surface rate constant even in cases in which the local surface kinetics at the active spots is infinitely first. The influence of geometric parameters (e.g., size and distance between the active sites) as well as control parameters such as the temperature on the apparent surface rate constant is investigated. (C) 2000 The Electrochemical Society. All rights reserved.
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