Electrodos modificados basados en materiales de carbono-líquidos iónicos y su actividad electrocatalítica hacia la reacción de reducción de oxígeno
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2020
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es
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Universidad Andrés Bello
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Licencia CC
Licencia CC
Resumen
En la búsqueda de nuevos materiales que puedan catalizar algunas reacciones
electroquímicas, se ha trabajado en la generación de electrodos basados en materiales
carbonosos, entre los que destacan el grafito, grafeno y nanotubos de carbón (CNTs), los
cuales presentan excelentes características mecánicas y eléctricas. Sus redes de átomos de
carbono con propiedades únicas de acuerdo a su organización espacial, les permiten ser
interesantes candidatos para ser empleados como sustrato o base de modificación, por lo
que son altamente atractivos para mediar diversas reacciones electroquímicas. Otros
compuestos como los líquidos iónicos aumentan la actividad electrocatalítica cuando se
mezclan con bases carbonosas, debido a la conductividad iónica que estos presentan.
Los líquidos iónicos pueden actuar como electrocatalizadores eficientes para mediar
diferentes reacciones, mostrando importantes desplazamientos de potencial, así como
también aumentos en los valores de corriente, dando cuenta de su importante actividad
electrocatálica. Además, la actividad de estos sistemas puede verse incrementada
significativamente cuando se emplean algunos materiales modificadores como los
complejos macrocíclicos. Estos complejos funcionan como electrocatalizadores eficientes
para mediar diferentes reacciones, mostrando importantes desplazamientos de potencial,
así como también aumentos en los valores de corriente, además, su actividad
electrocatalítica depende del metal central que estos presentan.
En base a los antecedentes mencionados, en este trabajo se propone realizar un estudio
bibliográfico exhaustivo de materiales electródicos diseñados con sustratos carbonosos
empleando líquidos iónicos y complejos macrocíclicos y su uso como posible
electrocatalizador. Se realizará un estudio completo bibliográfico en cuanto se refiere a
las propiedades fisicoquímicas de cada componente, preparación de los electrodos
modificados, caracterización electroquímica y electrocatálisis hacia la reacción de
reducción de oxígeno.
In search of new materials that can catalyze certain electrochemical reactions, work on the generation of electrodes based on carbon materials has been performed. Among those carbon materials, graphite, graphene, and carbon nanotubes (CNTs) stand out, which present excellent mechanical and electrical characteristics. Their carbon atom networks, with unique properties according to their spatial organization, turn them into interesting candidates to be used as substrate or base of modification; therefore, they are highly attractive to mediate different electrochemical reactions. Other compounds such as ionic liquids increase the electrocatalytic activity when mixed with carbon bases because of the ionic conductivity they present. Ionic liquids can work as efficient electrocatalysts to mediate different reactions, showing important potential displacements and increases in the current values, accounting for their important electrocatalytic activity. Moreover, the activity of these systems can be significantly increased when some modifying materials as macrocyclic complexes are used. These complexes work as efficient electrocatalysts to mediate different reactions, also showing important potential displacements and increases in the current values. Furthermore, their electrocatalytic activity depends on the central metal they present. Based on the above mentioned considerations, in this work we propose to perform an exhaustive literature review on electrodic materials designed with carbon substrates using ionic liquids and macrocyclic complexes, and their use as potential electrocatalysts. A complete literature review will be carried out about physicochemical properties of each component, preparation of the modified electrodes, electrochemical characterization and electrocatalysis towards the oxygen reduction reaction.
In search of new materials that can catalyze certain electrochemical reactions, work on the generation of electrodes based on carbon materials has been performed. Among those carbon materials, graphite, graphene, and carbon nanotubes (CNTs) stand out, which present excellent mechanical and electrical characteristics. Their carbon atom networks, with unique properties according to their spatial organization, turn them into interesting candidates to be used as substrate or base of modification; therefore, they are highly attractive to mediate different electrochemical reactions. Other compounds such as ionic liquids increase the electrocatalytic activity when mixed with carbon bases because of the ionic conductivity they present. Ionic liquids can work as efficient electrocatalysts to mediate different reactions, showing important potential displacements and increases in the current values, accounting for their important electrocatalytic activity. Moreover, the activity of these systems can be significantly increased when some modifying materials as macrocyclic complexes are used. These complexes work as efficient electrocatalysts to mediate different reactions, also showing important potential displacements and increases in the current values. Furthermore, their electrocatalytic activity depends on the central metal they present. Based on the above mentioned considerations, in this work we propose to perform an exhaustive literature review on electrodic materials designed with carbon substrates using ionic liquids and macrocyclic complexes, and their use as potential electrocatalysts. A complete literature review will be carried out about physicochemical properties of each component, preparation of the modified electrodes, electrochemical characterization and electrocatalysis towards the oxygen reduction reaction.
Notas
Unidad de Investigación (Licenciado en Química)
Palabras clave
Electrodos de Carbón, Electroquímica