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

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

A theoretical quantum study on the distribution of electrophilic and nucleophilic active sites on Ag...

Nucleation and growth of cobalt onto different substrates: Part II. The upd-opd transition onto a go...

Electrochemical kinetic study about cobalt electrodeposition onto GCE and HOPG substrates from sulfa...

THEORETICAL STUDY ON THE MODIFICATION OF ACTIVE SITES IN GOLD SURFACES MODELED AS FINITE CLUSTERS: I...

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

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

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

Do Spiroarsoranes Exhibit Polytopal Equilibrium in Solution?

Predicting the Phase Diagram of a Liquid Crystal Using the Convex Peg Model and the Semiempirical PM...