Electrocatalytic activity of 2,3,5,6-tetrachloro-1,4-benzoquinone/multi-walled carbon nanotubes immobilized on edge plane pyrolytic graphite electrode for NADH oxidation

dc.creatorLuz, RDS
dc.creatorDamos, FS
dc.creatorTanaka, AA
dc.creatorKubota, LT
dc.creatorGushikem, Y
dc.date2008
dc.dateMAY 30
dc.date2014-07-30T17:24:45Z
dc.date2015-11-26T16:52:13Z
dc.date2014-07-30T17:24:45Z
dc.date2015-11-26T16:52:13Z
dc.date.accessioned2018-03-28T23:39:08Z
dc.date.available2018-03-28T23:39:08Z
dc.identifierElectrochimica Acta. Pergamon-elsevier Science Ltd, v. 53, n. 14, n. 4706, n. 4714, 2008.
dc.identifier0013-4686
dc.identifierWOS:000255604900015
dc.identifier10.1016/j.electacta.2008.01.062
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/65474
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/65474
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1276218
dc.descriptionThis work reports the electrocatalytic activity of 2,3,5,6-tetrachloro-1,4-benzoquinone (TCBQ)/multi-walled carbon nanotubes (MWCNT) immobilized on an edge plane pyrolytic graphite electrode for nicotinamide adenine dinucleotide (NADH) oxidation. Scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS) were used to confirms the presence of chloro after the nanotube modification with 2,3,5,6-tetrachloro-1,4-benzoqui none. The surface charge transfer constant, k(s), and the charge transfer coefficient for the modified electrode, alpha, were estimated as 98.5 (+/- 0.6) s(-1) and 0.5, respectively. With this modified electrode the oxidation potential of the NADH was shifted about 300 mV toward a less positive value, presenting a peak current much higher than those measured on an unmodified edge plane pyrolytic graphite electrode (EPPG). Cyclic voltammetry and rotating disk electrode (RDE) experiments indicated that the NADH oxidation reaction involves 2 electrons and a heterogenous rate constant (k(obs)) of 3.1 x 10(5) mol(-1) l s(-1). The detection limit, repeatability, long-term stability, time of response and linear response range were also investigated. (C) 2008 Elsevier Ltd. All rights reserved.
dc.description53
dc.description14
dc.description4706
dc.description4714
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationElectrochimica Acta
dc.relationElectrochim. Acta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectNADH
dc.subjecttetrachloro-benzoquinone
dc.subjectmulti-walled carbon nanotubes
dc.subjectedge plane pyrolytic graphite
dc.subjectelectrocatalysis
dc.subjectNicotinamide Adenine-dinucleotide
dc.subjectAscorbic-acid
dc.subjectPaste Electrode
dc.subjectElectrochemical Properties
dc.subjectUric-acid
dc.subjectDerivatives
dc.subjectReduction
dc.subjectComposite
dc.subjectSurface
dc.subjectOxygen
dc.titleElectrocatalytic activity of 2,3,5,6-tetrachloro-1,4-benzoquinone/multi-walled carbon nanotubes immobilized on edge plane pyrolytic graphite electrode for NADH oxidation
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución