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催化学报  2014 

Silvernanoparticledecoratedpoly(2-aminodiphenylamine)modifiedcarbonpasteelectrodeasasimpleandefficientelectrocatalystforoxidationofformaldehyde

DOI: 10.1016/S1872-2067(14)60115-7, PP. 1565-1570

Keywords: Electrocatalyst,Silvernanoparticle,Formaldehyde,2-Aminodiphenylamine,Carbonpasteelectrode

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Abstract:

?Thisworkdescribesthepromisingactivityofsilvernanoparticlesonthesurfaceofapoly(2-aminodiphenylamine)modifiedcarbonpasteelectrode(CPE)towardsformaldehydeoxidation.ElectrodepositionoftheconductingpolymerfilmontheCPEwascarriedoutusingconsecutivecyclicvoltammetryinanaqueoussolutionof2-aminodiphenylamineandHCl.NitrogengroupsinthepolymerbackbonehadaAgionaccumulatingeffect,allowingAgnanoparticlestobeelectrochemicallydepositedonthesurfaceoftheelectrode.Theelectrochemicalandmorphologicalcharacteristicsofthemodifiedelectrodewereinvestigated.Theelectro-oxidationofformaldehydeonthesurfaceofelectrodewasstudiedusingcyclicvoltammetryandchronoamperometryinaqueoussolutionof0.1mol/LNaOH.Theelectro-oxidationonsetpotentialwasfoundtobearound-0.4V,whichisuniqueintheliterature.Theeffectofdifferentconcentrationsofformaldehydeontheelectrocatalyticactivityofthemodifiedelectrodewasinvestigated.Finally,thediffusioncoefficientofformaldehydeinalkalinemediawascalculatedtobe0.47×10-6cm2/susingchronoamperometry.

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