Skip to main content

Sealed Electrochemical Cell With Luggin 100ml


Conventional electrochemical cells include ordinary electrolytic cells, sealed electrolytic cells, traditional five-port electrolytic cells, and PTFE electrolytic cells. If the measurement needs to be carried out in a certain gas atmosphere or an oxygen-free environment, a sealed electrolytic cell must be used and equipped with air inlet and outlet pipes.

The sealed electrolytic cell is composed of a high borosilicate glass cell body and a PTFE cover. The tank body and the cover are connected by threads, and the fluorine rubber O-ring is embedded in the cover at the connection. The sealed electrolytic cell generally has three sealed electrode holes and two sealed air holes, all of which are sealed and fixed by sealing screws and fluorine rubber O-rings. The lower glass tank body can also be customized into a double-jacketed glass type according to the temperature control requirements. It is connected to the outer tank body through the hose of a peristaltic pump or a circulating pump. The liquid circulates in the glass jacket layer。 Relying on the exchange of cold and heat to achieve the effect of cooling or heating the electrolyte solution.

When using a sealed electrolytic cell, the air inlet and outlet operations are generally performed before or during the experiment, and a glass tube with a glass filter element at the end is selected to be inserted into the lower end of the air inlet hole. The gas can be converted into small bubbles for uniform aeration, which can fully drive the remaining bubbles in the liquid, and can also dissolve the electrolyte more fully, and avoid the accumulation of large bubbles from interfering with the working electrode test. Although the reference electrode and the working electrode are in the same chamber, the user can also choose to match the bent Luggin capillary as the built-in salt bridge. The lower end of the salt bridge faces the working electrode, so that the distance between the reference electrode and the working electrode can be reduced, the effect of R drop is effectively reduced, and the resistance overpotential is eliminated. Filling fluid needs to be added to the salt bridge, and the concentration of the filling fluid must be the same as the filling fluid of the inserted reference electrode.

The volume of the electrolytic cell should be selected moderately. If the volume is too large, the amount of solution will be too much, which is unnecessary. During electrochemical measurement, the electrode surface undergoes oxidation and reduction reactions, and some substances in the solution are reduced by participating in the electrode reaction. At the same time, some reaction products will dissolve into the solution. If the volume of the electrolytic cell is too small, the solution concentration will change significantly during the long-term steady-state measurement, which will eventually affect the experimental results. In most cases, the volume of 50ml and 100ml are more choices.

The material of the electrolytic cell must have good stability. In general, high borosilicate glass is widely used to make electrolytic cells of various shapes because of its good chemical stability, wide use temperature, high transparency and processing performance. The electrolytic cell made of glass is very stable in most inorganic electrolyte solutions and organic electrolyte solutions. At the same time, considering the use requirements of some special electrolyte systems and special shapes, PTFE, plexiglass, PEEK materials and various types of metal materials can also be used as preparation materials for electrolytic cells.


Popular posts from this blog

What is the CO2RR Gas Diffusion Flow Cell?

The CO2RR Gas Diffusion Flow Cell (CO2RR GDFC) is a type of electrochemical cell used in the conversion of carbon dioxide (CO2) to other chemicals through a process called the CO2 reduction reaction (CO2RR). It is similar in design to the Gas Diffusion Flow Cell (GDFC) used to measure gas permeability, but it is specifically designed to facilitate the electrochemical reduction of CO2. The CO2RR GDFC consists of a small, sealed chamber with two compartments separated by a thin, gas-permeable membrane. One compartment is filled with a CO2-containing gas mixture, while the other compartment contains an electrolyte solution and a catalyst material, such as copper or silver, which facilitates the CO2RR. The two compartments are separated by the gas-permeable membrane, which allows CO2 to diffuse from the high concentration compartment to the low concentration compartment. The CO2RR is driven by an electric potential applied across the two compartments, which induces the reduction of CO2 int

What is the Gas Diffusion Layer (GDL)?

      The GDL is a porous structure made by weaving carbon fibers into a carbon cloth (e.g. GDL-CT and ELAT) or by pressing carbon fibers together into a carbon paper.  Many of the standard GDLs that are produced today come with a Micro Porous layer (MPL) and hydrophobic treatment (PTFE).  The MPL and PTFE help with the contact to the membrane and with water management.  The MPL typically provides a smooth layer with plenty of surface area for catalyst and good contact with the membrane.  The MPL often uses PTFE as a binder that increases hydrophobicity, which helps keep the water within the membrane from escaping – drying out the membrane and causing higher resistance (lower performance).  There is often an additional PTFE coating on the MPL surface to further augment this. What Exactly Does a Gas Diffusion Layer (GDL) Do? GDL essentially acts as an electrode that facilitates diffusion of reactants across the catalyst layered membrane. The surface area and porosity of the GDL is what

How to do when the mercury oxide reference electrode broken?

Q: How to do when the mercury oxide reference electrode broken? A:  If the electrode is broken, please be sure to operate in accordance with the laboratory hazardous chemical treatment method to avoid the diffusion of mercury oxide, which is a toxic material. Description of the mercury oxide reference electrode: The mercury-mercury oxide(Hg/HgO) reference electrode is mainly used in alkaline solutions. It is an electrode composed of metallic mercury and its insoluble salt HgO and 1M KOH solution. Its electrode potential is 0.098V (25°C). The salt bridge of the Hg/HgO reference electrode is made of glass and PTFE, and the size is φ6*70mm. This size can be matched with various types of Dek Research electrochemical cells. Special attention should be paid to maintenance and storage when using the Hg/HgO reference electrode. The substance containing mercury oxide is a toxic substance, and the salt bridge solution is corrosive. Please strictly abide by the relevant laboratory safety regulati