The electrodeposition of nickel on vitreous carbon has been studied by electrochemical impedance techniques at low nickel concentrations (10V3-5 x lo-' M) with respect to pH (5 and 3) and anion (Cl-and SO:-). The results suggest a predeposition adsorption of an hydroxylated nickel complex, and passi
The simultaneous deposition of nickel and hydrogen on vitreous carbon
β Scribed by M. Fleischmann; A. Saraby-Reintjes
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 590 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0013-4686
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β¦ Synopsis
Linear sweep voltammograms for the dissolution of electrodcposited nickel indicate that a mixture of two nickel phases is usually deposited. These two phases have bezn identified as hydrogen-rich p-nickel and the solid solution a-nickel. The anodic charges obtained for each oF these have been used in the analysis OF the cathodif: transient. The partial transient for u-nickel appears to obey the laws for threedimensional growth and progressive nude&ion. In the partial transient for /?-nickel mass transfer of hydrogen ions becomes a rate-determining factor. The latter appears to be responsible for the maxima in the cathodic transients.
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