Electrochemistry of colloidal palladium : an experimental study of sol formation and electrocatalysis

The formation of small Pd colloidal particles in aqueous solution by electroless reduction of Pd salts is described. The presence of water-soluble polymers, such as polyvinylalcohol (PVA) and polyvinylpyrrolidone improves the colloid-chemical stability of the sols. The formation of the colloidal par...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1992-12, Vol.139 (12), p.3475-3480
Main Authors: VAN DER PUTTEN, A. M. T, DE BAKKER, J.-W. G, FOKKINK, L. G. J
Format: Article
Language:English
Subjects:
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Kinetics and mechanism of reactions
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Summary:The formation of small Pd colloidal particles in aqueous solution by electroless reduction of Pd salts is described. The presence of water-soluble polymers, such as polyvinylalcohol (PVA) and polyvinylpyrrolidone improves the colloid-chemical stability of the sols. The formation of the colloidal particles can be easily monitored by open-circuit potential measurements. PVA-stabilized Pd sols are highly catalytic for electroless Ni deposition. They readily induce electroless Ni plating on indium tin oxide substrates, where more classical initiation procedures fail.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2069102