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催化学报 2010
碱性介质中(氢)氧化铜修饰电极电催化氧化蔗糖DOI: 10.1016/S1872-2067(10)60125-8, PP. 1351-1357 Keywords: saccharose,copper(hydr)oxide,equivalentcircuit,electrocatalyticoxidation,mechanism Abstract: ？Astablecopper(hydr)oxide-modifiedelectrodewaspreparedin0.5mol/LNaOHsolutionbycyclicvoltammetryintherangeof-250to1？000mV.Itcanbeusedforelectrochemicalstudiesintherangeof-250to1？000mVwithoutinterferingpeaksbecausethereisnooxidationofcopper.Duringananodicpotentialsweep,theelectro-oxidationofsaccharoseonCuoccurredbytheformationofCuIIIandthisreactionalsooccurredintheearlystagesofthereversedcycleuntilitisstoppedbythenegativepotentials.Amechanismbasedontheelectro-chemicalgenerationofCuIIIactivesitesandtheirsubsequentconsumptionbysaccharosewasproposed,andtheratelawandkineticparameterswereobtained.Thechargetransferresistancefromtheoreticalandimpedancestudieswasusedtoverifythemechanism.Underchronoamperometryregimes,thereactionfollowedCottrellianbehavior.Thetransferofupto21electronswasobservedinfurtherinvestigationsoftheelectro-oxidationofsaccharoseona(hydr)oxideCurotatingdiskelectrode.
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