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1、DOI:10.1595/147106708X297855PlatinumasaReferenceElectrodeinElectrochemicalMeasurementsByKasemK.Kasem*andStephanieJonesDepartmentofNatural,Information,andMathematicalScience,IndianaUniversityKokomo,Kokomo,IN,46904-9003,U.S.A.;*E-mail:kkasem@iuk.eduTheusefulnessofplatinumasanelectroche
2、micalreferenceelectrodewasinvestigated.Wellknownredoxsystemswithone-electronsingleormultipleredoxwaves,andtwo-electronmultipleredoxwaveswereusedastestregimes.Theeffectsonelectrodeperformanceofvariablessuchasthesolvent,thephysicalstateoftheelectrolyteanditstemperaturewereinvestigated.
3、Cyclicvoltammetry(CV)wasusedtoderivekineticparametersforcomparisonwithcorrespondingmeasurementsontraditionalreferenceelectrodes.TheresultsindicatethatPtcanbeusedasareferenceelectrodeunderspecificconditionsinwhichtraditionalreferenceelectrodescannotbeused.Traditionalreferenceelectrode
4、susedforelec-Incertainelectrolytes,modificationofthePttrochemicalmeasurements,suchasthecalomelsurfaceisimportantforitsstability.Anodised,non-andsilver/silverchlorideelectrodes,havealimitedporousPthasdemonstrateditsusefulnessasarangeofapplicability.Theliquidjunctionisprob-solid-stater
5、eferenceelectrodebyvirtueofitsnear-lematicwiththeseelectrodes,andtheycannotbeNernstianbehaviour,lowhysteresisandrapidusedeitherwithwhollysolid-stateelectrochemicalresponse(15).ModificationstoPtwiremayextendcellsorforveryhigh-temperaturereactionssuchasitsusefulnesstomoreelectrochemica
6、lsystems.Thethoseinmoltenelectrolytes.Theuseofsolidplat-useofpolypyrrole(16),poly-1,3-phenylendiamineinumelectrodesinmoltensaltshasbeenreported(15)orpolyvinylferrocene(17)asasurfacemodifi-(1–14),butthereareproblemsassociatedwiththeercansuccessfullysuppresssignificantinterferenceusein
7、moltenmediaofPtelectrodes.Underbyanycoupledredoxsystemsorcontaminants.stronglyalkalineconditions,theyactuallyfunctionThefactthataPtelectrodecanbemodifiedwithasoxidationelectrodes(2).Ithasbeendemonstrat-nitrogen-basedpolymersorbeincorporatedaspartedthatPtfoilcannotactasareferenceelect
8、rodeinofabio
