Tetracyanoquinodimethanide adsorbed on a silica gel modified with titanium oxide for electrocatalytic oxidation of hydrazine

dc.creatorDuarte, JC
dc.creatorLuz, RDCS
dc.creatorDamos, FS
dc.creatorde Oliveira, AB
dc.creatorKubota, LT
dc.date2007
dc.dateMAY
dc.date2014-11-20T06:36:18Z
dc.date2015-11-26T17:16:29Z
dc.date2014-11-20T06:36:18Z
dc.date2015-11-26T17:16:29Z
dc.date.accessioned2018-03-29T00:04:40Z
dc.date.available2018-03-29T00:04:40Z
dc.identifierJournal Of Solid State Electrochemistry. Springer, v. 11, n. 5, n. 631, n. 638, 2007.
dc.identifier1432-8488
dc.identifierWOS:000244199400009
dc.identifier10.1007/s10008-006-0209-9
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/78630
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/78630
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/78630
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1282296
dc.descriptionThe electrocatalytical oxidation of hydrazine at low potential using tetracyanoquinodimethanide adsorbed on silica modified with titanium oxide was investigated by cyclic voltammetry and amperometry. The modified electrode was prepared modifying a carbon paste electrode employing lithium tetracyanoquinodimethanide adsorbed onto silica gel modified with titanium oxide. This electrode showed an excellent catalytic activity and stability for hydrazine oxidation. With this modified electrode, the oxidation potential of hydrazine was shifted toward less positive value, presenting a peak current much higher than those observed on a bare GC electrode. The linear response range, sensitivity and detection limit were, respectively, 2 up to 100 mu mol l(-1), 0.36 mu A l mu mol(-1), and 0.60 mu mol l(-1). The repeatability of the modified electrode evaluated in term of relative standard deviation was 4.2% for 10 measurements of 100 mu mol l(-1) hydrazine solution. The number of electrons involved in hydrazine oxidation ( 4), the heterogenous electron transfer rate constant (1.08 x 10(3) mol(-1) l s(-1)), and diffusion coefficient (5.9 x 10(-6) cm(2) s(-1)) were evaluated with a rotating disk electrode.
dc.description11
dc.description5
dc.description631
dc.description638
dc.languageen
dc.publisherSpringer
dc.publisherNew York
dc.publisherEUA
dc.relationJournal Of Solid State Electrochemistry
dc.relationJ. Solid State Electrochem.
dc.rightsfechado
dc.rightshttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dc.sourceWeb of Science
dc.subjecthydrazine
dc.subjectmodified electrode
dc.subjectLiTCNQ
dc.subjectGlassy-carbon Electrode
dc.subjectChemically Modified Electrodes
dc.subjectPentacyanonitrosylferrate Film
dc.subjectCapillary-electrophoresis
dc.subjectElectrochemical Detection
dc.subjectAmperometric Detection
dc.subjectCobalt Phthalocyanine
dc.subjectCyclic Voltammetry
dc.subjectAnodic-oxidation
dc.subjectPaste Electrode
dc.titleTetracyanoquinodimethanide adsorbed on a silica gel modified with titanium oxide for electrocatalytic oxidation of hydrazine
dc.typeArtículos de revistas


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