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Voltammetric study of the electrodeposition of CdS films from propylene carbonate solutions

✍ Scribed by E. Fatas; P. Herrasti

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
512 KB
Volume
33
Category
Article
ISSN
0013-4686

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✦ Synopsis

The mechanism of electrodeposition of CdS on Pt and Au electrodes has been studied in propylene carbonate solutions by performing cyclic voltammetry at stationary electrodes in solutions containing both Cd(R) ions and elemental sulphur. The formation of an initial layer of CdS by underpotential deposits of Cd reacting with chemisorbed sulphur is suggested. The growth of the films takes place afterward by reduction of sulphur to sulphide, which forms the deposit with Cd(lI) from the solution.

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The cathodic electrodeposition of CdS from aqueous solutions of Cd 2 + and $2 O2-at 90Β°C, has been investigated using a combination of voltammetric and galvanostatic techniques. It was found that the overall deposition is an EC-type mechanism, where the initial, electrochemical step is the reduction