AN ELECTROCHEMICAL STUDY OF THE COBALT ELECTRODEPOSITION ONTO A CARBON FIBER ULTRAMICROELECTRODE

ABSTRACT A kinetic study of the cobalt electrodeposition onto a carbon fiber ultramicroelectrode of 11 μm of diameter was conducted in overpotential conditions from an aqueous solution containing 0.01 M CoCl2 + 0.1 M NH4Cl. From the voltamperometric and chronoamperometric studies, it was found that the value of the diffusion coefficient is 1.2x10−5 cm2 s−1. The analysis of the current density transients suggests that cobalt electrodeposition onto a carbon fiber electrode follows an instantaneous nucleation process controlled by spherical diffusion mass transport. Also, the number of active nucleation sites increases as the applied potential decreases.

Bibliographic Details

Main Authors:	Corona-Castro,Jair A., Álvarez-Romero,Giaan A., Rivera,Margarita, Rios-Reyes,Clara H., Bañuelos-García,L.E., García-Sánchez,E., Mendoza-Huizar,Luis H.
Format:	Digital revista
Language:	English
Published:	Sociedad Chilena de Química 2022
Online Access:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072022000205500
Tags:	Add Tag No Tags, Be the first to tag this record!