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

Nucleation and growth of cobalt onto different substrates: Part I. Underpotential deposition onto a ...

Estudio de las Interacciones Ácido Húmico-Metales Pesados y Determinación de sus Constantes de Estab...

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

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

Characterization of Main Anthocyanins Extracted from Pericarp Blue Corn by MALDI-ToF MS

Mercury Ions Removal from Aqueous Solution Using an Activated Composite Membrane

Underpotential deposition of cobalt onto polycrystalline platinum

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

Quantum chemical study of the electrochemical reduction of the [Co(H2O)6]2+ and [Co(NH3)5(H2O)]2+ io...

Revisión de variables de diseño y condiciones de operación en la electrocoagulación