Silver electrodeposition from water–acetonitrile mixed solvents and mixed electrolytes in the presence of tetrabutylammonium perchlorate. Part I : electrochemical nucleation on glassy carbon electrode
Articolo
Data di Pubblicazione:
2009
Citazione:
Silver electrodeposition from water–acetonitrile mixed solvents and mixed electrolytes in the presence of tetrabutylammonium perchlorate. Part I : electrochemical nucleation on glassy carbon electrode / C. Mele, S. Rondinini, L. D’Urzo, V. Romanello, E. Tondo, A. Minguzzi, A. Vertova, B. Bozzini. - In: JOURNAL OF SOLID STATE ELECTROCHEMISTRY. - ISSN 1432-8488. - 13:10(2009), pp. 1577-1584.
Abstract:
Nucleation and growth of silver, electrodeposited
from water–acetonitrile (CH3CN from 0 to 100% by
volume) mixed solvents on glassy carbon electrodes, was studied by means of double-sweep voltammetry, current–time transients (CTT) and scanning electron microscopy (SEM). The effects of the addition of the specifically interacting tetrabuthylammonium cation were also investigated.
From voltammetries, the formal potential, the
nucleation potential and the cathodic current efficiency have been evaluated as a function of the mixed solvent composition. The key role on nucleation kinetics of transferring Ag+ from the bulk phase to the CH3CNenriched
electrode/solution interphase has been highlighted.
CTT transients were described by a model combining
instantaneous and progressive nucleation mechanisms. SEM images highlighted the effects of the presence of the organic solvent, which yields to a more regular growth, and of the quaternary ammonium salt, which exhibits grainrefining
properties.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Acetonitrile; Mixed solvents; Silver; Tetrabutylammonium perchlorate
Elenco autori:
C. Mele, S. Rondinini, L. D’Urzo, V. Romanello, E. Tondo, A. Minguzzi, A. Vertova, B. Bozzini
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