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DISEÑO Y CONSTRUCCION DE UN POTENCIOSTATO PARA PROCESOS DE SINTESIS DE MATERIALES USANDO ELECTRODEPOSICIÓN QUÍMICA
DESIGN AND CONSTRUCTION OF A POTENTIOSTAT FOR MATERIAL SYNTHESIS PROCESS USING CHEMICAL ELECTRODEPOSITION
Keywords:
Potenciostato, electrodeposición química, técnicas electroanalíticas. (es)Potentiostat, chemical electrodeposition, electroanalytical techniques. (en)
El presente trabajo se enfoca al diseño y desarrollo de un potenciostato, el cual pueda utilizarse en diferentes áreas incluyendo síntesis de materiales usando electro-deposición química, estudios de procesos de corrosión y pruebas de voltamperometria cíclica. El potenciostato desarrollado es versátil, estable, opera en el rango de micro-amperios y provee un alto rendimiento como el de un potenciostato comercial pero es de menor costo. En la construcción del potenciostato, se utilizaron amplificadores operacionales que presentan bajas corrientes de polarización, alta impedancia de entrada y baja tensión de offset, así como simulación de cargas con resistencias reales. Este potenciostato fue usado para caracterizar el proceso de óxido-reducción que ocurre en la electrodeposición química de paladio sobre un substrato. Los resultados de voltametria y deposición final son comparables con resultados reportados en la literatura para el paladio.
This work focuses on the design and development of a potentiostat, which can be used in different areas including synthesis of materials by chemical electrodeposition, studies of corrosion processes and tests of cyclic voltammetry. The developed potentiostat is versatile, stable, operates in the range of micro-ampere and pro-vides high performance as a commercial potentiostat but is lowest cost. Operational amplifiers featuring low currents of polarization, high impedance input and low offset voltage, as well as simulation of real resistance loads were used in the construction of the potentiostat. This potentiostat was used to characterize the process of redox occurring in the chemical electrodeposition of PD on a substrate. Voltammetry and final deposition results are comparable with results reported in the literature for the palladium.
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