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Impedance measurements of the underpotential deposition of Pb2+ and Tl+ on single crystal Ag surfaces

✍ Scribed by M. Klimmeck; K. Jüttner

Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
447 KB
Volume
27
Category
Article
ISSN
0013-4686

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✦ Synopsis

investigations of metal ion adsorption in the underpotential region were carried out with the aid of the alternating voltage method. To this end the impedance behaviaur of the system Ag (lOO)/Tl', Ag (lC'V/m *+, Ag(llO)/Tl' and Ag (l10)/Pb2' a( different potentials in the underpotential region in the frequency range of 100 mHz to 10 kHz was studied. Analysis of the electrode impedance shows that the adsorption of Pb'+ can hc interpreted on the basis of a simple Dolin-Ershler model with accompanying diffusion. For Tl+ adsorption more complicated model is necessary with fast transfer at line inhomogeneities and slow transfer at homogeneous surface regions.

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