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Of the electrodeposition techniques, the underpotential deposition
process (UPD) appears to be a serious contender as it can be carried
out at room temperature and pressure. In order to gain a deeper
insight into this system, Mexican researchers L.H. Mendoza-Huizar, C.H.
Rios Reyes, M. Rivera and C.A. Gal�n-Vidal from the Universidad
Aut�noma del Estado de Hidalgo, Universidad Aut�noma
Metropolitana-Azcapotzalco and Ciudad Universitaria, carried out a
voltammetric study about the UPD process of cobalt onto glassy carbon
electrodes from ammoniacal solutions.
The analysis of the experimental data clearly showed the presence of a
diffusional-controlled underpotential deposition of cobalt onto glassy
carbon electrode (GCE). The voltammetric studies suggested the
existence of at least two phases of cobalt deposited in UPD conditions.
These results pave the way for further research and place the
underpotential deposition process a step closer to being a
commercially viable technique for producing multilayer cobalt thin
films.
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