Wuhan Corrtest Instruments Corp., Ltd.
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RRDE 2-channel potentiostat CS2350M bipotentiostat with EIS in both channels has two sets of built-in independent potentiostat /galvanostat. So it equals that you have 2 sets potentiostat in one instrument. Full floating module and electrical isolation design guarantee each channel is totally independent, which ensures accurate data. For CS2350M bipotentiostat, Each channel provides full electrochemical techniques including EIS.The two channels can jointly complete experiment of two-working electrode system such as RRDE and Hydrogen diffusion Test. Besides, better than many other bipotentiostat in the market, experiment can be conducted simultaneously in each channel. RRDE 2-channel potentiostat CS2350M bipotentiostat with EIS in both channels is the real double-channel potentiostat. It uses Ethernet connection. EIS module is included in both channels.
The photo of RRDE 2-channel potentiostat CS2350M bipotentiostat with EIS in both channels
2-channel potentiostat CS2350M bipotentiostat has 2 sets single-channel potentiostat in the instrument. It can do all that a single-channel potentiostat can do.
(1) Electrosythesis, electrodeposition (electroplating), anodic oxidation, electrolysis
(2) Electrocatalysis such as Oxygen reduction reaction (ORR), OER, HER, CO2 reduction.
(3) Li-ion battery, solar cell, fuel cell, supercapacitor, advanced function materials, sensor, etc
(4) Corrosion behavior of metals, and anti-corrosion evaluation
(5) Fast evaluation of inhibitor, water quality stabilizer, coating, and cathodic protection efficiency.
Typical applications of 2-channel potentiostat CS2350M bipotentiostat:
Rotating Ring-Disk Electrode (RRDE)
Oxidation/reduction reaction (ORR) study: while measuring the polarization curve of disk electrode in the main channel, apply a constant polarization potential on the ring electrode, and thus detect the intermediate products on the disk electrode. RRDE test becomes the typical method for ORR study. 2-channel potentiostat CS2350M bipotentiostat with EIS in both channels can be connected to any RRDE equipment.
When doing the RRDE test, if a bipotentiostat is used, the test can be done directly by the technique “RRDE”. If two sets single-channel potentiostat are used, instead of a set 2-channel potentiostat CS2350M bipotentiostat, you should choose “floating” mode for both sets single channel potentiostat to avoid interference between the potentiostats.
Faradaic efficiency test
In electrocatalysis, the Faradaic efficiency is measured to evaluate the performance of the catalyst. The cable connection is shown in below picture. A constant current will be applied on the disk and occur OER and produce oxygen. A constant voltage is applied on the ring and it occurs ORR and consume oxygen. The Faradaic efficiency can be calculated based on disk current and ring current.
Specifications of RRDE 2-channel potentiostat CS2350M with EIS in both channels
| Specifications | |
| Support 2-, 3- or 4-electrode system | Interface: Ethernet |
| Potential control range: Primary Channel: ±10V second Channel: ±10V | Current control range: ±1A in each channel |
| Potential control accuracy: 0.1%×full range±1mV | Current control accuracy: 0.1%×full range |
| Potential resolution: 10μV (>100Hz), 3μV (<10Hz) | Current sensitivity:1pA |
| Rise time: <1μS (<10mA), <10μS (<2A) | Reference electrode input impedance:1012Ω||20pF |
| Current range: 2nA~2A, 10 ranges | Compliance voltage: ±21V |
| Maximum current output: ±1A in each channel | CV and LSV scan rate: 0.001mV~10,000V/s |
| CA and CC pulse width: 0.0001~65,000s | Current increment during scan: 1mA@1A/ms |
| Potential increment during scan: 0.076mV@1V/ms | SWV frequency: 0.001~100 kHz |
| DPV and NPV pulse width: 0.0001~1000s | AD data acquisition:16bit@1 MHz,20bit@1 kHz |
| DA Resolution:16bit, setup time:1μs | Minimum potential increment in CV: 0.075mV |
| IMP frequency: 10μHz~1MHz | Low-pass filters: Covering 8-decade |
| Potential and current range: Automatic | Weight / Measurements: 6.5kg,36 x 30 x16cm |
| Operating System: Windows 10/11 | |
| Electrochemical Impedance Spectroscopy (EIS) | |
| Signal generator | |
| Frequency range:10μHz~1MHz | AC amplitude:1mV~2500mV |
| DC Bias: -10~+10V | Output impedance:50Ω |
| Waveform: sine wave, triangular wave and square wave | Wave distortion:<1% |
| Scanning mode: logarithmic/linear, increase/decrease | |
| Signal analyzer | |
| Integral time: minimum:10ms or the longest time of a cycle | Maximum:106 cycles or 105s |
| Measurement delay:0~105s | |
| DC offset compensation | |
| Potential automatic compensation range: -10V~+10V | Current compensation range: -1A~+1A |
| Bandwidth: 8-decade frequency range, automatic and manual setting | |
Techniques of RRDE 2-channel potentiostat CS2350M with EIS in both channels
Bipotentiostat
Stable polarization
Transient Polarization
Chrono Method
Voltammetry
Electrochemical Impedance Spectroscopy (EIS)
Corrosion Measurements
Battery test
Amperometric
Stripping Voltammetry
Advantages of 2-channel potentiostat CS2350M bipotentiostat:
Full floating
All Corrtest potentiostats / galvanostats incuding CS2350M Biptentiostat are designed as full-floating, and can be used for electrochemical study of working electrode connecting to earth, such as autoclave, metal part in bridge, concrete
Real-time data storage
Experiment data can be stored in real time. Even if the test is interrupted by a power failure, the data will be automatically saved. The data is compatible with Excel, Origin, and can be directly opened.
EIS
● Corrtest potentiostat incl. CS2350M Biptentiostat uses correlation integral algorithm and dual-channel over-sampling technique, and has strong anti-interference ability. The internal resistance of the instrument is up to 1013Ω. It's suitable for EIS measurements of high-impedance system (such as coating, concrete etc.)
● With constant current carrier and DC bias technology, Corrtest potentiostat can be used for battery impedance measurement under charge and discharge state, suitable for ultra-low resistance system (such as 18650 battery, soft pack battery, battery core...)
Multi electrode system
● Support 2-, 3-, 4-electrode system, can be used to test battery internal resistance or 4-electrode thin film impedance measurement
● With Zero resistance ammeter for galvanic current measurement
Software development kit(SDK)
We can provide secondary development interfaces,API general interfaces and development examples, and can realize data call for Labview, C, C++, C#, VC and other program, which is convenient for secondary development and test methods customization.
High current option
●With the CS2020B/CS2040B booster, the current can be boosted to 20A/40A, which meets the requirement in fuel cell, power battery, electroplating, etc
Versatile data analysis
CS Studio is the software for Corrtest potentiostat incl. CS2350M Biptentiostat with EIS in both channels for experiment control and data analysis. It can do: multi-parameter Tafel curve fitting, derivation, integration and peak height analysis of voltammetric curve, EIS equivalent circuit customization and impedance spectrum fitting, etc.
● Multi-parameters Polarization curve
● EIS fitting
● Electrochemical noise analysis
● Pseudo capacitance calculation
● GCD specific capacitance, efficiency
● Mott-Schottky plot analysis
● CV analysis
Combination test
CS studio software supports the combination test for various experiments to achieve flexible and
unattended test. You can set the parameters for each experiment in advance, and set the intervals, wait time etc between each experiment.
Combination Test: corrosion tests
Combination Test: Pseudo capacitor tests
Software Features
Cyclic voltammetry: CS studio software provides users a versatile smoothing/differential/ integration kit, which can complete the calculation of peak height, peak area and peak potential of CV curves. In CV technique, during the data analysis, there is function of selecting exact cycle(s) to show.
Tafel plot and corrosion rate: CS studio also provides powerful non-linear fitting on Butler-Volmer equation of polarization curve. It can calculate Tafel slope, corrosion current density, limitation current, polarization resistance, corrosion rate. It can also calculate the power spectrum density, noise resistance and noise spectrum resistance based on the EN measurements.
Battery Test and analysis:
charge & discharge efficiency, capacity, specific capacitance, charge & discharge energy.
EIS analysis: Bode, Nyquist, Mott-Schottky plot
During EIS data analysis, there is built-in fitting function to draw the custom equivalent circuit.
Q: Is your Corrtest 2-channel potentiostat CS2350M bipotentiostat compatible to other RRDE rotator?
A: Yes. Our bipotentiostat is compatible to any brand RRDE rotator, because it’s all about connecting the RRDE electrodes with the electrode cables.
Q: Can I install and view the software without connecting 2-channel potentiostat CS2350M bipotentiostat before purchase?
A: During pre-sales communication, we have customers who want to see our CS studio software before deciding to purchase. We can send the software package for your installation, and then please follow the steps to use the package without connection a Corrtest potentiostat.
Q: How to check and judge if the 2-channel potentiostat CS2350M bipotentiostat with EIS in both channels works normally?
A: You can use the dummy cell(we provide it along with the CS2350M Bipotentiostat) to judge whether the potentiostat works normally. The dummy cell is a simulation standard cell. You can do the potentiostatic, galavanostatic experiment and check the value of the potential and current. They should obey the Ohm law.
Q: What is the difference between RDE and RRDE? What are the applications of each?
A: RDE and RRDE are both rotating working electrodes, which are essential for kinetic studies, such as ORR or HOR. They are not essential for other tests such as HER or OER, but better if available.
Q: During RRDE test for ORR, how is the ring voltage determined when testing the electron transfer number and hydrogen peroxide yield?
A: Any value between 1.2-1.5 V RHE is OK, such as 1.3 V RHE, based on the oxidation of hydrogen peroxide intermediates without producing other side reactions.