Wuhan Corrtest Instruments Corp., Ltd.
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Potentiostat for electrocatalysis CS350M is an ideal tool for the electrocatalysis studies, such as HER, OER, ORR, CO2RR, NRR etc. Max. current is ±2A, which is excellent for electrocatalysis requiring higher current than some other fields. Potential range is ±10V. Compliance voltage is ±21V(ideal for some H-cells electrocatalysis systems). EIS frequency range is 10uHz~1MHz. Potentiostat for electrocatalysis CS350M consists of high power high precision potentiostat, galvanostat, DDS arbitrary function generator, dual-channel correlation analyzer, dual-channel high-speed 16bit/high-precision 24bit AD converter and extension interfaces. Besides electrocatalysis, potentiostat for electrocatalysis CS350M can also be used for corrosion measurement, energy &battery testing, materials, sensors, electrodeposition etc. The current can be boosted up to 20A/40A/100A with the corresponding current booster. We have CS350MA version with customized ±30V compliance voltage, which is especially useful when the testing cell voltage is high for some experiment such as CO2RR.
Applications of potentiostat for electrocatalysis CS350M
● Electrocatalysis (HER, OER, ORR, CO2RR, NRR)
● Study of Energy materials (Li-ion battery, solar cell, fuel cell, supercapacitors), advanced functional materials
● Corrosion study and corrosion resistance evaluation of metals; quick evaluation of corrosion inhibitors, coatings, and cathodic protection efficiency
● Electrosynthesis, electroplating/electrodeposition, anode oxidation, electrolysis
| Specifications of potentiostat for electrocatalysis CS350M | |
| Support 2-, 3- or 4-electrode system | Potential and current range: Automatic |
| Potential control range: ±10V | Current control range: ±2A |
| 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 (have ±30.V option) |
| Maximum current output: 2A | 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 |
| Operating System: Windows 10/11 | Interface: USB 2.0 |
| Weight / Measurements: 6.5kg, 36.5 x 30.5 x16 cm | |
| EIS (Electrochemical Impedance Spectroscopy) | |
| 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 potentiostat for electrocatalysis CS350M
Stable polarization
Transient Polarization
Chrono Method
Voltammetry
Electrochemical Impedance Spectroscopy (EIS)
Corrosion Measurements
Battery test
Amperometric
Extensions
# There is the corresponding stripping method.
Application
Electro-catalysis
● Potentiostat for electrocatalysis CS350M can measure the half-wave potential (ORR), overpotential (HER, OER) of the catalyst, and has the function of peak power density and energy density calculation.
● Long-term cyclic measurement for ORR, OER, HER,
CO2RR by techniques such as cyclic voltammetry,
potentiostatic, galvanostatic. Faraday efficiency can be
measured with a bipotentiostat.
LSV curve of catalysts in alkaline solution
● Maximum current can be 20A and compliance voltage can be 30V, and with IR compensation technique,
Corrtest potentiostat can precisely measure the overpotential of the electrode, which is a big advantage in electrocatalysis field.
Advantages
Full floating
Potentiostat for electrocatalysis CS350M is 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
For all Corrtest potentiostat such as potentiostat for electrocatalysis CS350M, 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.
Electrochemical impedance spectroscopy (EIS)
● Potentiostat for electrocatalysis CS350M 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, potentiostat for electrocatalysis CS350M 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
● Potentiostat for electrocatalysis CS350M Supports 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, high compliance options
●With the CS2020B/CS2040B booster, the current of potentiostat for electrocatalysis CS350M can be boosted to 20A/40A, which meets the requirement in fuel cell, power battery, electroplating, etc
●Can customize the potentiostat for electrocatalysis CS350M to be 30V high compliance voltage, which meets the test requirement in low-conductivity solutions (organic system, concrete system etc), especially suitable for carbon and nitrogen reduction study.
Versatile data analysis
CS Studio is the software for Corrtest potentiostat incl. potentiostat for electrocatalysis CS350M 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: electrocatalysis
Q: Can I install and view the software of potentiostat for electrocatalysis CS350M without connecting potentiostat 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 demo mode without connecting to a Corrtest potentiostat.
Q: How to check and judge if the potentiostat for electrocatalysis CS350M works normally?
A: You can use the dummy cell(we provide it along with the potentiostat) to judge whether the potentiostat for electrocatalysis CS350M works normally. The dummy cell is a simulation standard cell. You can do the potentiostatic, galavanostatic, eis experiment and check the value of the potential and current. They should obey the Ohm law.
Q: For water splitting, why is solution usually strong acid and alkaline systems, with very few neutral systems?
A: Now PEM water splitting also uses CCM coating technology, just like fuel cells. A bonded catalyst using proton conductors is used to conduct protons, and the catalyst is in an acidic environment. Taking Nafion as an example, the environment of the catalyst is equivalent to about 10% sulfuric acid.
Q: After completing the LSV test of OER, the open circuit voltage (used for AC impedance testing) remains unstable and the voltage reading keeps decreasing. What should I do?
A: After polarization, the material is in an unstable state. Waiting longer till it gets stable, or do potentiostatic treatment.
Q: How to characterize the stability and activity content of ORR catalysts with a potentiostat for electrocatalysis CS350M?
A: Run a CV cycle, comparing CV and LSV before and after, for instance 30000 cycles;
Measure the i-t curve;
Take TEM images before and after stability to see if the catalyst has agglomerated.
Q: For HER and OER, should the catalyst be hydrophilic or hydrophobic?
A: Hydrophilic and aerophobic are the best. Hydrophilicity allows the electrolyte to fully infiltrate the catalyst, while aerophobic allows the generated gas to quickly detach from the catalyst surface.
Q: How to set the LSV scan rate for ORR, HER, and OER?
A: For ORR, 5 mV/s is better, and 10 mV/s is also OK. If the scan rate is too high, the background will be large; if it is too low, the influence of imnrrpurities will be big.For OER/HER, 5 mV/s or 2 mV/s is better. Different materials should have an optimized scan rate. If the material has a large specific surface area, such as carbon materials, the scan rate needs to be appropriately reduced to lessen the capacitance background.