Evidence of silver(I) adsorption processes on the electroactive surface of the silver/silver selenide electrode

A silver(I) ion-selective electrode, based on the silver selenide formed by cathodic deposition of selenium directly onto a silver substrate, is described. The deposition is carried out at a density current of 2 mA cm −2 from 0.1 M Na 2SeO 3 solution whose pH is decreased to between 5 and 6 with eit...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 1995-03, Vol.24 (1), p.336-340
Main Author: Papeschi, G.
Format: Article
Language:English
Subjects:
Adsorption
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Ion-selective electrode
Silver
Silver selenide
Study of interfaces
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Summary:A silver(I) ion-selective electrode, based on the silver selenide formed by cathodic deposition of selenium directly onto a silver substrate, is described. The deposition is carried out at a density current of 2 mA cm −2 from 0.1 M Na 2SeO 3 solution whose pH is decreased to between 5 and 6 with either sulphuric or hydrochloric acid. Experimental results about the adsorption process of silver(I) ions on the electroactive surface of the Ag/Ag 2Se electrode are discussed. In order to measure the silver(I) release or uptake of one Ag/Ag 2Se electrode, a second Ag/Ag 2Se electrode previously stabilized in the base electrolyte is used as a measuring electrode in the same solution.
ISSN:0925-4005
1873-3077
DOI:10.1016/0925-4005(95)85073-2