Producción Científica Profesorado

Kinetic study of the cobalt electrodeposition onto glassy carbon electrode from ammonium sulfate solutions



Mendoza Huizar, Luis Humberto

2009

Kinetical study of the cobalt electrodeposition onto glassy carbon electrode from ammonium sulfate solutions. C.H. Rios-Reyes, M. Granados-Neri and L.H. Mendoza-Huizar. Quim. Nova, Vol. 32, No. 9, 2382-2386, 2009 ISSN . 0100-4042


Abstract


We carried out an electrochemical study of the cobalt electrodeposition onto glassy carbon electrode from an aqueous solution containing 10-2 M of CoSO4 + 1 M (NH4)2SO4 at natural pH 4.5. The potentiostatic study indicated a progressive 3D nucleation and growth during the deposition process. The average diffusion coefficient calculated for this system was 2.65 X 10-6 cm2 s-1 while the ?G for the formation of stable nucleus was 6.50 X 10-20 J/nuclei. The scanning electron microscopy images indicated the formation of small and homogeneous nucleus onto GCE of approximately 300 nm.



Producto de Investigación




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