Kinetical study about the cobalt electrodeposition onto polycrystalline platinum
AUTOR(ES)
Rios-Reyes, Clara Hilda, Mendoza-Huizar, Luis Humberto, Reyes-Cruz, Víctor Esteban, Veloz Rodríguez, María Aurora
FONTE
Quím. Nova
DATA DE PUBLICAÇÃO
2013
RESUMO
An electrochemical study of Co electrodeposition onto polycrystalline Pt from an aqueous solution containing 10-2 M CoCl2 + 1 M NH4CI (pH = 9.3) was conducted at overpotential conditions. The current density transients showed two maxima that corresponded to two nucleation and growth processes. The entire transient behavior was adequately predicted considering the contribution to the total current of four different processes: a Langmuir-type adsorption process, a diffusion-controlled two-dimensional instantaneous nucleation, and two three-dimensional nucleation and growth processes.
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