Producción Científica Profesorado

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



Mendoza Huizar, Luis Humberto

2006

A voltammetric study of the underpotential deposition of cobalt onto a glassy carbon electrode. L.H. Mendoza-Huizar, C.H. Rios Reyes, M. Rivera and C.A. Galán-Vidal. DOI : 10.2240/azojomo0233


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.



Producto de Investigación




Artículos relacionados

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

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

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

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

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

Influence of the Crystallinity of the Substrate on Kinetic Parameters of Zinc Electrodeposition Proc...

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

Analysis of the experimental pressuretemperature behavior in the isotropicnematic phase transition f...

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

Nucleation and Growth Kinetics of Electrodeposited Sulfate-Doped Polypyrrole: Determination of the D...