Corresponding Author

Bing-liang WU


A pulse potential-modulated technique was applied to measure the concentration of CO_2 in gas samples. In the first step, an anodic pulse and a consequent cathodic pulse were used to remove the organic pollutant and surface oxide on the surface of the platinized Pt gauze electrode before each experiment. As following, a given potential step was used to reduce the CO_2 into adsorbed intermediate on Pt surface, and the adsorbates produced were oxidized by a following anodic potential step. At same time the oxidation current of adsorbates were measured. A certain relation exists between the concentration of CO_2 and the oxidation charge within the concentration range of (0.015)% to 20%. The approximate linear concentration-charge relation appears during a shorter reduction period and at a lower concentration of CO_2. It's wide convenient and effective for the detection of CO_2 in a relatively wide concentration range.


Sensor, Carbon dioxide, Pulse potential-modulated, Solid polymer electrolyte, Pt (electrode)

Publication Date


Online Available Date


Revised Date


Received Date



[1] SeveringhausJW,BradleyAF.ElectrodesforbloodpO2andpCO2determination[J].J.Appl.Physiol,1958,13:515.
[2] ChangSC,StefferJR.ChaCS.Amperometricgassensors[J].Talanta,1993,40(4):461.
[3] CaoZ,ButtnerWJ,StetterJR.Thepropertiesandapplicationsofamperometricgassensors[J].Electroanalysis,1992,4:253.
[4] TaniguchiI.ModernAspectsofElectrochemistry[M].No.20.BockrisJOM,WhiteRE,ConwayBE,Ed.NewYork:PlenumPress,1980.
[5] SawerDT,RobertsJL.Electrochemistryofoxygenandsuperoxideionindimethysulfoxideatplatinum,goldandmercuryelectrodes[J].J.ElectroanalChem.,1966,12:90.
[6] QianF,LuJT,ZhouZB,etal.Combinedamperometricsensorsforsimultaneousmeaurementofcarbondioxideandoxygen[J].SensorsandActuatorsB.,1993,17:77.
[7] K櫣verA,VielstichW.Onthequantitativedeterminationofcarbondioxideinair.Anewsensortechniqueusinganodicadsorbatestripping[J].J.ElectroanalChem.,1993,353:255
[8] ArevaloMC,Gomis BasC,HahnF,etal.Acontributiontothemechanismof"reduced"CO2adsorbateselectro oxidationfromcombinedspectroelectrochemicalandvoltammetricdata[J].ElectrochimActa.,1994,39(6):793.
[9] HuiChiChiu,TseungACC.ElectrochemicalCO2sensorbasedonCO2reductionandsubsequentCOoxidationonPt/WO3electrode[J].ElectrochemicalandSolid stateLetters,1999,2(10):540.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.