Original scientific paper

https://doi.org/10.5562/cca3923

Palladium Electrodeposition Onto a Carbon Fiber Ultramicroelectrode

Adrian S. Bravo-Rodriguez ; Universidad Autónoma del Estado de Hidalgo. Academic Area of Chemistry. Carretera Pachuca-Tulancingo Km. 4.5 Mineral de la Reforma México
Giaan A. Álvarez-Romero ; Universidad Autónoma del Estado de Hidalgo. Academic Area of Chemistry. Carretera Pachuca-Tulancingo Km. 4.5 Mineral de la Reforma México
Margarita Rivera ; Instituto de Física, Universidad Nacional Autónoma de México, Ciudad de México, 04510, México
Eduardo García-Sánchez ; Universidad Autónoma de Zacatecas, Unidad Académica de Ingeniería Eléctrica, Av. Ramón López Velarde 801, Zacatecas, 98600, México
Luis H. Mendoza-Huizar orcid.org/0000-0003-2373-4624 ; Universidad Autónoma del Estado de Hidalgo. Academic Area of Chemistry. Carretera Pachuca-Tulancingo Km. 4.5 Mineral de la Reforma México

Abstract

In the present work, it was conducted an electrochemical and kinetic study of Pd electrodeposition onto a 7 μm diameter CF (carbon fiber) ultramicroelectrode from an aqueous solution containing 1 mM of PdCl2 and 1 M NH4Cl as supporting electrolyte, at 25 °C and pH = 4.5. The voltammetric study suggests that at slow scan rates, radial diffusion is favored. The experimental current density transients obtained from the potentiostatic study were well predicted by an instantaneous nucleation and growth mathematical model, that considers the formation of separated hemispherical nuclei. The number of nuclei formed on the electrode surface is potential dependent, and increases as the applied potential diminishes.

Keywords

palladium; kinetics; electrodeposition; carbon fiber

Hrčak ID:

292841

URI

https://hrcak.srce.hr/292841

Publication date:

3.2.2023.

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