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Electrocatalysis of NADH on 3,5-Dinitrobenzoic Acid Encapsulated on Multiwalled Carbon Nanotube-Modified Electrode

Authordc.contributor.authorMoscoso Cabello, Raúl 
Authordc.contributor.authorInostroza Briones, Elías 
Authordc.contributor.authorBollo Dragnic, Soledad 
Authordc.contributor.authorSquella Serrano, Juan 
Cita de ítemdc.identifier.citationElectrocatalysis Volumen: 7 Número: 5 Páginas: 357-361es_ES
Abstractdc.description.abstractWe report that glassy carbon electrode (GCE) modified with multiwalled carbon nanotubes (MWCNTs) can encapsulate or entrap 3,5-dinitrobenzoic acid (35DNB) generating a 35DNB-MWCNTGC electrode. After electrochemical reduction in situ of only one nitro group of 35DNB, it turns into the hydroxylamine derivative (R-NHOH), which can be further oxidized to the nitroso derivative (R-NO). Then, R-NO/R-NHOH redox couple was electrogenerated in situ by cycling the potential between 0.20 and -0.20 V vs Ag/AgCl. The very well-defined and persistent redox couple was characterized with a formal potential, E (o) 'aEuroe= -28 mV vs Ag/AgCl at a scan rate of 20 mV s(-1). Using the Laviron's plot, a transfer coefficient, alpha = 0.45, and an electron transfer rate constant, k (s) = 10.5 s(-1), for the electron transfer of the couple R-NO/R-NHOH, were calculated. This redox reaction results to be a very efficient mediator for electrocatalytic NADH oxidation. The 35DNB-MWCNTGC electrode efficiently catalyzes the oxidation of NADH with a decrease of more than 0.60 V vs Ag/AgCl in the overpotential compared to the bare GCE and a difference of 0.25 V vs Ag/AgCl with respect to the situation without mediator. The preparation of the electrode is very easy and not time-consuminges_ES
Patrocinadordc.description.sponsorshipFONDECYT 1130160es_ES
Keywordsdc.subjectModified electrodees_ES
Keywordsdc.subject3,5-Dinitrobenzoic acides_ES
Títulodc.titleElectrocatalysis of NADH on 3,5-Dinitrobenzoic Acid Encapsulated on Multiwalled Carbon Nanotube-Modified Electrodees_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES
Access notedct.AccessRightsSin acceso a texto completoes_ES

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