Resumen

BORBON JARA, Brenda et al. Evaluación electroquímica de nanoestructuras Fe/MWCNT-Pt y Fe/MWCNT-Pt-Pd como materiales de cátodos multifuncionales con potencial aplicación en el mejoramiento de la calidad de agua tratada. Mundo nano [online]. 2015, vol.8, n.14, pp.6-16.  Epub 28-Mayo-2021. ISSN 2448-5691.  https://doi.org/10.22201/ceiich.24485691e.2015.14.52508.

This paper presents an electrochemical strategy to evaluate nanostructured materials with high potential to be used as multifunctional cathodes. The goal is to increase the capability of an electrochemical process to degrade and eliminate recalcitrant organic compounds in treated water. The object under study is the production of hydroxyl radical (•OH), also identified as a powerful oxidant (2.8 V vs. ENH), only overcome by Fluorine (3.03 V vs. ENH). This radical is commonly formed on the surface of catalytic anodes or by Fenton reactions; however, this paper shows that it is also possible to form the radical on a cathode, simulating the advanced oxidation mechanism known as electro-Fenton. The high reactivity of •OH to destroy persistent compounds is plentifully proved and justify the use of electrocatalytic nanostructured materials to multiply its effectiveness in an electrochemical cell. The evaluation of multifunctional cathodes­ containing Pt y Pt-Pd, supported on raw multiwalled carbon nanotubes, MWCNT, was done by cyclic voltammetry to validate the in-situ formation of •OH radical. At this point, authors visualize the feasibility to develop a new electrochemical process using a multifunctional electrodes, with Fe species in the electrode surface and supported electrocatalysts, to transform O₂ into H₂O₂ and H₂O₂ into •OH, accordingly to improve the quality of treated water without extra chemicals.

Palabras llave : hydroxyl radical; Pt/MWCNT; quality of treated water; electro-Fenton process.

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