Authors: L O S Bulhões L H Mascaro
Publish Date: 2003/09/02
Volume: 8, Issue: 4, Pages: 238-243
Abstract
The nucleation process of Pb and Cu onto indiumtin oxide electrodes was studied by single potentiostatic steps using 01×10−4 mol L−1 CuNO32 and 2×10−2 mol L−1 PbNO32 solutions in aqueous 10 mol L−1 NaNO3 The current I max and the time t max corresponding to the maximum were evaluated by 3D nucleation with a diffusioncontrolled growth model for instantaneous and progressive nucleation The nondimensional plots of I/I max2 vs t/t max showed that Cu and Pb nucleation closely followed the response predicted for instantaneous nucleation Other parameters such as I vs t 1/2 and I 2 max t max as well as nuclei micrographs were analyzed corroborating the results obtained
Keywords: