F. Dion et A. Lasia, The use of regularization methods in the deconvolution of underlying distributions in electrochemical processes, J ELEC CHEM, 475(1), 1999, pp. 28-37
Many problems in electrocatalysis involve distribution of adsorption energi
es. Similarly, electrochemical impedance spectroscopy often involves distri
buted elements. Such problems are described by Fredholm integral equations
and the underlying distribution functions may be solved using regularizatio
n techniques. A software package developed recently was used to determine t
he distribution function and the regularization parameters. Our studies sho
w that it is relatively easy to obtain the adsorption energy distribution f
unctions In simple cases. Comparison of the hydrogen adsorption on polycrys
talline and monocrystalline (531) platinum shows similarities in the adsorp
tion energies on both surfaces. Continuous (constant phase element and disc
ontinuous (fractal model) time constant distribution functions in the imped
ance were well reproduced, but in the more complex case (porous electrode)
the method is more limited. (C) 1999 Elsevier Science S.A. All rights reser
ved.