Producción Científica Profesorado

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



Galan Vidal, Carlos Andres

2006

L.H. Mendoza-Huizar, C.H. Rios Reyes, M. Rivera-Hernández and C.A. Galán-Vidal. The underpotential deposition of cobalt onto glassy carbon electrode. A voltammetric study. ATM Advances in Technology of Materials & Materials Processing 8 (2006) 152-156. ISSN 1440-0731


Abstract


We have carried out an electrochemical study of the underpotential deposition of cobalt onto glassy carbon electrode (GCE) from an aqueous 10-2 M CoClO4, 1M NH4CI (pH 4.5) solution by the voltammetric techniques (cyclic, linear and rotating disk electrode voltammetry). The analysis of the experimental data clearly showed the presence of an underpotential deposition (UPD) process of cobalt onto GCE that started at -0.160 V vs Ag/AgCl (KCl sat.). Both, the linear plots of the density current peak versus the scan potential rate and the limit density current versus the rotation rate also suggested that the UPD process of cobalt onto GCE was diffusional-controlled. The voltammetric studies suggested the existence of at least two phases of cobalt deposited in UPD conditions. The formation of the first phase was favored in the [-0.200 - -0.370] V range and when the thickness of the diffusional layer decreased, while the second one was favored in the [-0.380 - -0.550] V range.






Artículos relacionados

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

Synthesis of Zn compounds derived from 1H-benzimidazol-2-ylmethanamine

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

Synthesis and crystal structures of cis-palladium(II) and cis-platinum(II) complexes containing di...

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

Kinetics of Polypyrrole Films Doped with Sulphate Ions Electrodeposited Over Graphite - Epoxy Resin ...

Underpotential deposition of cobalt onto polycrystalline platinum

The role of temperature in copper electrocrystallization in ammoniachloride solutions

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

Bioacumulación y daños genotóxicos en Pez Cebra (Danio rerio) por arsénico en aguas de Zimapán, Hida...