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PGZ TwoWORKAUXREFCell ringCell AUXCell REFPGZ Two settings (Ring):6.3.4 Curve examination1) Linear Voltammetry (EAD_Copper005.CRV)Display: Type = Normal X = Time Y1 = Current Y2 = IringY1 represents the disc current and Y2 represents the ring current.158VoltaLab 21/06/10/40/50/80Section 6, Chapter 3: Rotating Ring and Disc Electrode (EAD)
1-a) Disc and ringAccording to [1], two waves are detected on the disc which correspond to thereaction (1) and then (2) while the ring exhibits a signal which increases duringthe first disc wave and then decreases. This reaction correspond to the reaction(1). When the disc reaches a potential which corresponds to the second wave, thereaction which is taking place on the disc is cooper deposition; there is no moreCu(+) which can be captured by the ring. As a consequence, the ring current falls tozero.(1) [Cu(2+)] [Cu(+)] e° = +0.16 V / SHE(2) [Cu(2+)] [Cu(0)] e° = +0.34 V/SHE(a) [Cu(0)] + [Cu(2+)] --> [Cu(+)]2) Open circuit potential (EAD_Copper011.CRV)Display: Type = Normal X = Time Y1 = Potential Y2 = IringOnce the voltammetry is finished, the disc electrode regulation is opened but theregulation on the ring electrode continues. The Ring potential which is measuredcorresponds to the open circuit potential of the ring. At the beginning, the ring iscovered with copper [which results from the Cu(2+) deposition operated duringthe voltammetry]. One can say that the disc is a cooper disc. Since a spontaneouschemical oxidation of this cooper layer takes place (a), it takes less than oneminute to dissolve the cooper and obtain a platinum disc again. The variationof the potential correspond to that phenomenon. Since that chemical oxidationgenerates [Cu(+)], this [Cu(+)] can be detected on the ring. The current recorded inthe meanwhile on the ring is Iring. During the chemical dissolution of the cooper, asignificant current is recorded which correspond to the fact that Cu(+) are availableand can be oxidized onto the ring. Once the cooper layer is completely dissolved,there are no more Cu(+) ions in solution and thus the ring current goes back tozero.VoltaLab 21/06/10/40/50/80 159Section 6, Chapter 3: Rotating Ring and Disc Electrode (EAD)
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Register your product nowTo keep up
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ContentsRegister your product now 1
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1. General presentationDear Custome
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Precautionary LabelsRead all labels
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1.3 VoltaLab 21 Economical Electroc
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1.6 VoltaLab 40 Dynamic Electrochem
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1.8 VoltaLab 80 Universal Electroch
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Edit the Other settings parameters.
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2.5 Uninstalling VoltaMaster 4Volta
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3. Getting startedFor a VoltaLab 10
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For a VoltaLab 06RS232 cable9-pin f
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3.3 User identificationIf you selec
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3.5 Set up your instrumentIf you se
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3.7 Set up the Other settings param
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4. VoltaMaster 44.1 The VoltaMaster
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Curve type bar - XX is the abscissa
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4.2 Using the VoltaMaster 4 Help fi
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4.3.1 Open Circuit PotentialThe Ope
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Visual IFVA virtual front panel is
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4.3.13 Pot. Dynamic EIS (Impedance)
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4.3.17 Gal. Expert EIS (Impedance)T
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4.3.22 Pot. Step by step CVStep by
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4.3.28 Gal. Universal DPThe Gal. Un
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4.3.34 Pot. Low Current CAA potenti
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4.3.40 Auto. TrajectThe Auto. Traje
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4.3.46 Standard calibrationThis met
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4.3.47 Calibration by additionThis
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4.3.53 Print ReportThe Print Report
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The following guidances are given i
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8. Save the sequenceThe initial dat
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4.5.1 Before starting a sequenceChe
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4.6 Processing curves to obtain res
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4.6.1 Post run processing functions
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InformationDisplay information on a
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Evans plotDisplay the Evans diagram
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4.7 PrintoutsThe Printpreview iconV
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4.7.3 Preparing a printoutThe “Fi
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4.7.5 Printing the parameters of an
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4.7.6 Printing CurvesA curve or an
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1. 20 curves maximun in a graphYou
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6. Current disjunctionEffectsThe po
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11. Out of range: -15 V to 15 VWhil
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17. Vg overloadThis error message i
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4.9 Troubleshooting list4.9.1 Chara
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4.10 The ohmic drop compensation4.1
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4.10.4 Running an experiment with a
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CGgIPpQRSTZCalibration CV STGal. Un
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Menu “File” (Routine setup mode
Page 108 and 109: Menu “Settings” (Full and Super
Page 110 and 111: Menu “File” (Routine setup mode
Page 112 and 113: Menu “Settings” (Full and Super
Page 114 and 115: 5.1.1 The front panelsPGZ100 and PG
Page 116 and 117: The “D/A OUT” socket (4)A DC vo
Page 118 and 119: 5.1.2 The rear panelsLINE FUSE T2A
Page 120 and 121: 4 connecting cords are used (see th
Page 122 and 123: 5.1.4 UseThe PGZ and PST potentiost
Page 124 and 125: 5. Background noise on measurements
Page 126 and 127: 5.1.7 Technical specificationsPGZ10
Page 128 and 129: PGZ301 PotentiostatRegulationCompli
Page 130 and 131: PGZ402 Universal PotentiostatRegula
Page 132 and 133: PST006 Educational PotentiostatRegu
Page 134 and 135: 5.1.8 CE MarkingThe PGZ100, PGZ301,
Page 136 and 137: the PGP201 internal signal generato
Page 138 and 139: 5.2.2 The rear panelLI-BATTERY3.6 V
Page 140 and 141: 5.2.3 InstallationElectrical safety
Page 142 and 143: 2. Connecting the computerSee Secti
Page 144 and 145: 3. User data lost - Press any keyTh
Page 146 and 147: 5.2.6 MaintenanceWarning!All cables
Page 148 and 149: 5.2.8 CE MarkingThe PGP201 complies
Page 150 and 151: If the EDI10000 is used:ONE(X) INI
Page 152 and 153: 3. To set another electrode rotatin
Page 154 and 155: Cables 1 to 4 are supplied in the C
Page 156 and 157: 6.3 Rotating Ring and Disc Electrod
Page 160 and 161: 6.3.5 ConclusionIt is convenient an
Page 162 and 163: 1 PGZ/PST050 “REF.” socket to t
Page 164 and 165: 6.5.2 SettingsEstablish the serial
Page 166 and 167: 166VoltaLab 21/06/10/40/50/80Sectio
Page 168 and 169: Determine the peak and integrate th
Page 170 and 171: Determine the peak and integrate th
Page 172 and 173: 6.6 ABU901 AutoburetteThe ABU901 is
Page 174 and 175: RS232 cable9-pin female / 9-pin fem
Page 176 and 177: 6.7.4 Set up your cellIf you run a
Page 178 and 179: 6.7.8 Technical specifications - HV
Page 180 and 181: 6.8 HCB005 - HCB010 - HCB020 High C
Page 182 and 183: RS232CLINE FUSE T2A L250V120/230 Va
Page 184 and 185: If it is not the case (communicatio
Page 186 and 187: 6.8.5 Set up the other settingsSet
Page 188 and 189: Environmental conditionsInterior us
Page 190 and 191: 6.9 Additional units - PGZ402 E(X)
Page 192 and 193: Check that the electrical zero and
Page 194 and 195: Click the “Settings” button and
Page 196 and 197: 6.11 External signal generator - Vg
Page 198 and 199: 6.12 Measuring an A/D IN signalUsin
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