Cyclic voltammetry made easy without the high price
The Ossila Potentiostat is a powerful but easy-to-use measurement device for performing cyclic voltammetry. With a low price, FREE worldwide shipping and our two-year warranty, more laboratories than ever can now be equipped with a three electrode system for measuring and analysing the electronic properties of materials.
The full system will be available for £1600 and includes a potentiostat, electrochemical cell, electrodes and PC measurement software. The potentiostat can also be purchased on its own (without an electrochemical cell or electrodes but with the PC software) at a reduced cost.
What is a Potentiostat?
Potentiostats are control and measurement devices designed to output a controlled potential. Unlike other voltage sources, potentiostats contain feedback circuitry between the output and measured potential. This enables them to maintain a set potential through a circuit with varying resistance by increasing or decreasing the output so that the measured potential remains constant.
Potentiostats are primarily used for cyclic voltammetry.
What is Cyclic Voltammetry?
Cyclic voltammetry is one of the most widely used electrochemical techniques. By linearly cycling the applied voltage of the working electrode to create a duck-shaped plot of potential versus current, known as a cyclic voltammogram, the cyclic voltammetry method reveals a number of important electrochemical properties.
To allow for a wide range of material characterisation, the Ossila Potentiostat is capable of outputting potentials of up 10 V and measuring currents as low as 10 nA. Easy-to-use PC software is included with the system and makes it straight-forward for anyone to obtain a cyclic voltammogram.
Wide Potential and Current Range
The potentiostat is capable of delivering potentials up to ±10 V and can measure currents between ±10 nA and ±150 mA over five ranges
Quick and Easy
Set up is as simple as plugging it in and installing the PC software. Start measuring within minutes of unboxing the potentiostat
Compact and Light
At only 12.5 x 18.5 cm, the small size of the potentiostat enables it to fit into even the busiest laboratory
Our intuitive PC software makes it faster and easier to perform cyclic voltammetry measurements
Potentiostats are primarily used in electrochemistry to control the potential between the working and reference electrodes. Measurements which can be taken include:
- Reduction and oxidation potentials
- Reversibility of a reaction
- Electron transfer kinetics
- Energy levels of semiconducting polymers
The following items are included as standard:
- 4 mm banana cables and crocodile clips
- Cyclic voltammetry PC software
- USB-B cable
- 24 V / 2 A DC power adaptor
If purchased with a cell, the following items are also included:
- Electrochemical glassware
- Platinum disk working electrode (1 mm diameter)
- Platinum wire counter electrode (0.5 mm diameter)
- Non-aqueous Ag/Ag+ reference electrode
|Potential range||±5 V|
|Potential compliance||±10 V|
|Applied potential resolution||333 µV|
|Applied potential accuracy||±10 mV offset|
|Maximum current||±150 mA|
|Current ranges||±10 nA to ±150 mA (5 ranges)|
|Current accuracy||≤0.2% (at full range scale)|
|Current resolution||≤0.0007% of current range (0.1 nA on 20 µA range)|
|Overall Dimensions||Width: 125 mm Height: 55 mm Depth: 175 mm|
Pricing and Options
The complete three electrode system comes with three electrodes and a high quality cell, included at a reduced price for purchasers of the Ossila Potentiostat. A lower price option is also available if a cell is not required. Both packages qualify for FREE worldwide shipping and our two-year equipment warranty.
|Price with cell||£1600|
|Price without cell (potentiostat only)||£1300|
Cyclic Voltammetry Software
The Ossila Potentiostat, when purchased either with or without an electrochemical cell, includes control and measurement software for performing cyclic voltammetry. Software updates are also provided at no extra charge and are available to download from our website.
As with all of our software, data is saved to comma-separated value (.csv) files so that you can analyse it with your favourite tool. Profiles allow you to save commonly used settings configurations, further speeding up your research. Furthermore, settings are saved alongside measurement data so that you always have a record of your experimental parameters.
Software Key Features
Our intuitive potentiostat software enables you to easily perform cyclic voltammetry. Simply set the current range, start potential, potentials at which the scan changes direction, scan rate, and number of cycles and click 'Measure'. Watch the measurement as it happens with live plotting of data.
Intuitively-designed user interface
Easy to use, start taking electrochemical measurements within minutes
Live updating plot
Plot cyclic voltammograms in real time
Data saved to .csv file
Software agnostic data exports enable you to use your favourite analytical tools
Create settings profiles
Repeat cyclic voltammetry experiments without having to re-enter your settings
|Operating System||Windows Vista, 7, 8, or 10 (32-bit or 64-bit)|
|CPU||Dual Core 2 GHz|
|Available Hard Drive Space||108 MB|
|Monitor Resolution||1280 x 960|
Cyclic Voltemmetry Setup
Cyclic voltammetry is an electroanalytical technique that is commonly used in chemistry. It is performed using a potentiostat, an electrochemical cell, and three electrodes. The cell is filled with an electrolyte, and the three electrodes are placed within. These electrodes are:
- Working electrode
- Counter electrode
- Reference electrode
The working electrode is coated with the chemical to be tested, and linearly ramping potential is applied between the working and reference electrodes. This potential is cycled such that the ramp is applied in one direction, then in reverse, forming a triangular wave. Whilst this is occurring, the electrical current is measured between the working and counter electrodes.
Cyclic Voltemmetry Basics
When performing cyclic voltemmetry, the applied potential causes the chemical being tested to undergo either oxidation or reduction depending on the direction of the ramping potential. Oxidation and reduction are electron transfer processes. When a chemical undergoes oxidation, it loses an electron and is said to be oxidised. Likewise, when a chemical undergoes reduction, it gains an electron and is said to be reduced.
To aid in the explanation of what occurs during the measurement, we shall use the example of ferrocene (Fc).
First, a positively ramping potential (the forward sweep) is applied between the working and reference electrodes. As the potential increases, Fc close to the working electrode is oxidised (i.e., loses an electron), converting it to Fc+. The movement of the electrons creates an electrical current.
As un-reacted Fc diffuses to the electrode and continues the oxidation process, the electrical current is increased and there is a build up of Fc+ at the electrode. This build up of reacted material is called the diffusion layer, and effects the rate at which un-reacted material can reach to the electrode. Once the diffusion layers reaches a certain size, the diffusion of Fc to the electrode slows down, resulting in a decrease in the oxidation rate and thus a decrease in electrical current.
When the potential ramp switches direction, the process reverses (the reverse sweep). Fc+ close to the working electrode reduces (i.e., gains an electron), converting it back to Fc. The electrical current flows in the opposite direction, creating a negative current. The Fc+ diffuses to the electrode, reducing to Fc and resulting in a increase in the negative current.
As with the forward sweep, a build up of material occurs near the electrode, eventually slowing down the diffusion of Fc+ and causing the negative current to decrease.
To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.