What is working and counter electrode?
The Counter Electrode in lab cells is generally an inert conductor like platinum or graphite. In field probes, it is generally another piece of the Working Electrode material. The current that flows into the solution via the Working Electrode leaves the solution via the Counter Electrode.
What size should a counter electrode be?
1.6. The surface of the counter electrode should be at least ten times greater than the surface of the working electrode.
What is counter and reference electrode?
Reference electrode allows you to measure the potential of the working electrode with out passing current through it while counter (auxiliary) electrode allows you to pass current.
What is counter electrode in DSSC?
The counter electrode, as a crucial component of DSSCs, collects electrons from the external circuit and catalyzes the redox reduction in the electrolyte, which has a significant influence on the photovoltaic performance, long-term stability and cost of the devices.
What is the use of working electrode?
When applied to biosensors, the working electrode monitors the oxidation or reduction of a species near the surface of the electrode. Amperometric devices continuously measure current resulting from the oxidation or reduction of an electroactive species in a biochemical reaction.
Why do we use potentiostat?
A potentiostat is an analytical instrument designed to control the working electrode’s potential in a multiple electrode electrochemical cell. The potentiostat contains many internal circuits that allow it to function in this capacity. The circuits generate and measure potentials and currents.
What is the role of mesoporous tio2 in Dssc?
This mesoporous structure could facilitate mass transport and diffusion of the electrolyte in DSSC.
Is counter electrode cathode or anode?
The auxiliary electrode, often also called the counter electrode, is an electrode used in a three electrode electrochemical cell for voltammetric analysis or other reactions in which an electric current is expected to flow.
What is Chronopotentiometry used for?
Chronopotentiometry is used to study mechanism and kinetics of chemical reactions. In this technique, the instrument operates in galvanostatic mode to control current and measure voltage. The applied current can consist of either a single or double step. It is generally performed in a quiet (unstirred) solution.
What should be the surface area of counter electrode?
The surface of the counter electrode should be at least ten times greater than the surface of the working electrode. The aim is to study the half reaction occurring at the working electrode.
Can a reference electrode be used as a counter electrode?
In some cases, typically when working with microelectrodes, or when the current is very small for some other reason, it is possible to use the reference electrode as the counter electrode.
What is the purpose of the counter or auxiliary electrode?
The counter or auxiliary electrode provides a means of applying input potential to the working electrode. The purpose of these electrodes is to complete the circuit and allow charge to flow.
What is a working electrode?
The working electrode is the electrode in an electrochemical system on which the reaction of interest is occurring. The working electrode is often used in conjunction with an auxiliary electrode, and a reference electrode in a three electrode system.