Producción Científica Profesorado

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



Mendoza Huizar, Luis Humberto

2002

Nucleation and Growth of Cobalt onto different Substrates. Part I Underpotential Deposition onto a Gold Electrode. L.H Mendoza-Huizar, J Robles, M Palomar-Pardavé. http://dx.doi.org/10.1016/S0022-0728(02)00659-9


Abstract


The formation and stripping of a cobalt adlayer were studied by electrochemical techniques at underpotential conditions, monitoring the deposition/dissolution onto/from a polycrystalline gold electrode. The kinetics of the former process fit a model where adsorption and diffusion-controlled two-dimensional instantaneous nucleation of cobalt occurs simultaneously onto the gold electrode surface. The latter involves a complex mechanism where adsorption/desorption competes with two processes, an instantaneous nucleation and growth of two-dimensional holes under charge transfer control and a progressive one. However, it was found that the relative contribution of the instantaneous nucleation was the most important independently of the applied potential.



Producto de Investigación




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