Description of silver electrodeposition on different carbon matrices

Description of silver electrodeposition
on different carbon matrices
Paola G. Castillo Gama, M. Miranda-Hernández
Dpto. Materiales Solares, Instituto en Energías Renovables.
Universidad Nacional Autónoma de México.
Apartado Postal 34, Temixco, Mor. 62580, México.
[email protected]
It is presented the study of silver particles electrodeposition on different matrices:
glassy carbon, multi-walled carbon nanotubes (MWCN) and carbon black. For each
type of matrix, the silver electrodeposition is described by cyclic voltammetry and
different potential pulses. Electrodeposition was carried out using an electrolyte 0.02M
Ag (I) (as AgNO3), 1M KNO3. The figure 1 shows some results obtained from the
electrodeposition on Glassy Carbon electrode and Multi-walled carbon nanotubes.
-1.E-04
Carbón
Glassy Vítreo
carbon
Agº/Glassy
Agº/
Carbóncarbon
Vítreo
I / A cm-1
-8.E-05
-6.E-05
-4.E-05
-2.E-05
0.E+00
0
5
10
15
time / s
MWCN
-1.0E-04
Agº/ MWCN
I/Acm
-1
-6.0E-05
-2.0E-05
0
5
time/s
10
15
Figure 1. In the MWCNT is evident that the silver electrodeposition mechanism can
not be described by the classical models of electrocrystallization
Acknowledgements. This work has been given the financial support by CONACyT
(Project 167485), PAPIIT-UNAM (Project IN112212).