Skoči na glavni sadržaj

Croatica Chemica Acta, Vol. 97 No. 3, 2024.

Izvorni znanstveni članak

https://doi.org/10.5562/cca4122

Electrochemical Study of Nickel Electrodeposition from Chloride Solutions onto Glassy Carbon Electrodes

Luis Humberto Mendoza-Huizar orcid id orcid.org/0000-0003-2373-4624 ; Universidad Autónoma del Estado de Hidalgo. Área Académica de Química. Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km. 4.5, CP. 42184 Mineral de la Reforma, Hidalgo, México *
Giaan Arturo Álvarez Romero ; Universidad Autónoma del Estado de Hidalgo. Área Académica de Química. Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km. 4.5, CP. 42184 Mineral de la Reforma, Hidalgo, México
Maria Elena Paez Hernández ; Universidad Autónoma del Estado de Hidalgo. Área Académica de Química. Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km. 4.5, CP. 42184 Mineral de la Reforma, Hidalgo, México
Margarita Rivera ; Instituto de Física, Universidad Nacional Autónoma de México, Ciudad de México, 04510, México

* Dopisni autor.

Puni tekst: engleski pdf 7.218 Kb

str. 119-129

preuzimanja: 28

citiraj

Sažetak

In the present work, we conducted an electrochemical study on nickel electrodeposition on glassy carbon electrode (GCE) from an ammoniacal solution containing 0.01 M NiCl2 and 0.1 M NH4Cl. From the voltammetric study, it was possible to calculate the diffusion coefficient's value as 1.93 × 10–6 cm2s–1. The current density transients were analyzed using a kinetic mechanism model involving three different contributions: (a) a Langmuir-type adsorption process, (b) 3D nucleation limited by a mass transfer reaction, and (c) a proton reduction process. Non-linear fittings of the current density transients revealed that the values of the nucleation rate (A) and the number of active nucleation sites (N0) increased with the decrease in the applied overpotential. Morphological studies have confirmed the existence of a progressive nucleation process with Ni crystallites ranging from 0.5 to 4 µm.

Ključne riječi

nickel; electrodeposition; kinetic; proton reduction; glassy carbon

Hrčak ID:

327197

URI

https://hrcak.srce.hr/327197

Datum izdavanja:

20.11.2024.

Posjeta: 86 *