Effects of Energetic Surface Heterogeneity on Ion Adsorption at the Electrolyte/Oxide Interfaces: Non-symmetrical Binding-to-Surface Energy Dispersions
作者:
W. Kudziriski,
W. Piasecki,
R. Charmas,
G. Panas,
期刊:
Journal of Dispersion Science and Technology
(Taylor Available online 2000)
卷期:
Volume 21,
issue 6
页码: 711-738
ISSN:0193-2691
年代: 2000
DOI:10.1080/01932690008913305
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The equations developed by us for the surface complexation models, taking into account energetic heterogeneity of surface oxygens, are applied here to study the effects of the shape of adsorption energy distribution on the ion adsorption at the oxide/electrolyte interface. The paper presents comparison of two models: one assuming that the energetical heterogeneity of oxide surface is described by a symmetrical and next a non-symmetrical adsorption energy dispersion for the formation of various surface complexes. The comparison of these two models was based on the obvious assumption that the variances of both the symmetrical and the non-symmetrical distributions are equal. The potentiometric titration data are not sensitive enough to choose the right adsorption model. So, in addition the individual isotherms of adsorption of cation and anion, of the inert electrolyte measured radiometrically, have been taken into consideration. The symmetrical adsorption energy distribution seems to represent the features of these adsorption systems better.
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