Photoelectrochemical reduction of nitrate ions on porous silicon and different silicon modified electrodes

E. C. Muñoz, C. A. Heyser, R. S. Schrebler, R. G. Henríquez, R. E. Marotti

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

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Resumen

We examined the reduction reaction of nitrate ions on different electrode systems: silicon monocrystalline (n-type and p-type), porous silicon, and silicon modified by electrodeposited metallic rhenium. In a first stage, voltammetric analysis in different HF media was performed. With this technique it was possible to establish the different processes associated to porous silicon formation. The morphology of the porous silicon was studied using AFM. Voltammetric analysis was then performed using different silicon substrates. This was then used to study the electrochemical reduction reaction of nitrate ions. A decrease in the overpotential of the reaction was observed, with a consequent increase in current density when the silicon electrodes were modified by electrodeposited rhenium. Finally, an analysis of the reaction products from the nitrate electroreduction was carried out using photoelectrolysis at controlled potential.

Idioma originalInglés
Páginas (desde-hasta)781-785
Número de páginas5
PublicaciónJournal of the Chilean Chemical Society
Volumen56
N.º3
DOI
EstadoPublicada - 2011
Publicado de forma externa

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