Naslov
Application of Carbon Fibre Microelectrodes in Electrochemical Investigations

Autori
Posavec, Damir ; Petrović, Željka ; Metikoš-Huković, Mirjana

Izvornik
Scientific Papers of the University of Pardubice. Series A, Faculty of Chemical Technology (1211-5541) 10 (2004); 93-102

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Ni ; electrocrystallization ; carbon fiber microelectrode ; 3D progressive nucleation with diffusion-controlled growth

Sažetak
In this work, the electrocrystallization of nickel from Ni^2+ acidic bath has been investigated using an assembly of carbon fiber microelectrodes, consisting of single and multi microdiscs randomly distributed inside the matrix of a non-conducting polymer. The microdiscs were far enough apart that the crystals could not interact, thus limiting the total observed current density to a linear superposition of the current densities from each crystal considered independentely. the current- time transients response was quantitatively evaluated using Scharifker ang hills nucleation model. The high rate of nucleation after a rapid increase in the overpotentials was discussed in relation to the physical model for three- dimensional nucleation with diffusion-controlled growth. Excellent agreement between the experimental results and the theoretical curve for 3D progressive nucleation was obtained.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA