Producción Científica Profesorado

Cobalt Electrodeposition Process from Electrolytic Baths based on CoSO4 and (NH4)2SO4. Influence of [Co(II)]



Mendoza Huizar, Luis Humberto

2009

Cobalt Electrodeposition Process from Electrolytic Baths based on CoSO4 and (NH4)2SO4. Influence of [Co(II)]". M. Granados-Neri, L.H. Mendoza-Huizar. ECS Transactions ECS Transactions (2009) Volume 20, pp- 375-383 ISSN: 1938-586


Abstract


In this work we carried out an electrochemical study of the cobalt electrodeposition from ammonium sulfate solutions (x CoSO4 + 1M (NH4)2SO4, where x=0.005, 0.01, 0.05 and 0.1M) onto glassy carbon electrode. From the potentiostatic study, it was obtained that the nucleation rate increases with the increment of cobalt in the plating bath. From our thermodynamic study we found that the [Co(H2O)6]2+ chemical specie was the predominant complex. The conditional equilibrium potential (Eq) depends on the cobalt concentration in the solution, thus an increase in [Co(II)] decreases the Eq. A clear linear tendency in the plot lnA vs E was observed for systems II and III. However, non linear plots were gotten for systems I and IV, indicating the existence of additional processes that affects the nucleation and growth mechanisms.



Producto de Investigación




Artículos relacionados

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

Synthesis, Characterization and Catalytic Activity of Supported NiMo Catalysts

Magnetic transition phase diagram of cobalt clusters electrodeposited on HOPG: Experimental and micr...

Theoretical and Experimental Study of Cobalt Nucleation and Growth onto Gold Substrate with Differen...

Cobalt electrodeposition onto highly oriented pyrolytic graphite (HOPG) electrode from ammonium sulf...

A Voltammetric Study Of The Underpotential Deposition Of Cobalt Onto A Glassy Carbon Electrode

Potentiometric behavior of graphite-epoxy electrochemical transducers towards anions, cations and pH...

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

Efecto de la composición del soporte sobre las estructuras superficiales de óxidos de níquel y molib...

Cobalt electrodeposition on polycrystalline palladium. Influence of temperature on kinetic parameter...