Published

2012-07-01

EVALUACION DEL SISTEMA ELECTROQUIMICO DE Pd(NH3)4Cl2 SOBRE SUSTRATO DE ALUMINIO

EVALUATION OF THE ELECTROCHEMICAL SYSTEM Pd (NH3)4Cl2 ON ALUMINUM SUBSTRATE

Keywords:

Tafel, cronoamperometría, voltametría cíclica. (es)
Tafel, chronoamperometry, cyclic voltammetry. (en)

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Authors

  • Álvaro Gómez Peña Grupo de Procesos Químicos Catalíticos y Biotecnológicos, Facultad de Ingeniería y Arquitectura, Universidad Nacional de Colombia, Sede Manizales
  • Juan S. Arcila Henao Grupo de Procesos Químicos Catalíticos y Biotecnológicos, Facultad de Ingeniería y Arquitectura, Universidad Nacional de Colombia, Sede Manizales

En el presente trabajo, se caracterizó un sistema electroquímico mediante el empleo de técnicas de   voltametría cíclica y cronoamperometría.  Ecuaciones de la electroquímica fundamental como la ecuación de Nernst, ecuación de Cottrell y la ecuación de Tafel fueron empleadas para determinar los parámetros  difusionales  y cinéticos durante el proceso de deposición de Pd sobre un sustrato de aluminio,  utilizando una solución electrolítica de  Pd(NH3)4Cl2. Los parámetros calculados fueron el coeficiente de difusión (D), coeficiente de transferencia (α),  la velocidad cinética (k0) y la corriente de intercambio (I0).

In the present work, electrochemical reaction system was characterized by means of electrochemical techniques of cyclic voltammetry and chronoamperometry. We used equations of basic electrochemistry including the equations of Nernst, Cottrell and Tafel, in order to determine the diffusional and kinetic parameters during the process of deposition of Pd on a substrate of aluminum, using a Pd (NH3)4Cl2 electrolyte solution. The calculated parameters were the diffusion coefficient (D), transfer coefficient (α), kinetic rate (ko), and exchange current (I0).

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