Which reference electrode should I use?
The reversible hydrogen electrode (RHE) is often used as the reference electrode when studying single crystal electrode properties in H2SO4. It has the advantage that no foreign ions are introduced.
What are reference electrodes give example?
It is an electrode whose potential is arbitrarily taken as zero or is exactly known. Standard Hydrogen Electrode (SHE), calomel electrode, silver-silver chloride electrode and glass electrode are some examples of reference electrode.
What are various types of reference electrodes?
Types of Reference Electrodes
- Silver/Silver Chloride Reference Electrodes.
- Calomel Reference Electrodes.
- Hydrogen Reference Electrodes.
- Double Junction Reference Electrodes.
- Liquid Junction Reference Electrodes.
Is NHE a reference electrode?
Aqueous reference electrodes Normal hydrogen electrode (NHE) (E ≈ 0.000 V) concentration H+ = 1 Molar. Reversible hydrogen electrode (RHE) (E = 0.000 V – 0.0591 × pH) Saturated calomel electrode (SCE) (E = +0.241 V saturated)
Why is reference electrode used?
The purpose of the reference electrode is to provide a stable potential for controlled regulation of the working electrode potential and in doing so allow the measurement of the potential at the working electrode without passing current through it. An ideal reference electrode should also have zero impedance.
What is primary reference electrode?
Primary and secondary reference electrodes The Standard Hydrogen Electrode (SHE) is considered the primary reference electrode as it defines the zero point in the electrochemical scale.
Is platinum electrode a reference electrode?
The results indicate that Pt can be used as a reference electrode under specific conditions in which traditional reference electrodes cannot be used. Traditional reference electrodes used for electrochemical measurements, such as the calomel and silver/silver chloride electrodes, have a limited range of applicability.
What is primary and secondary reference electrode?
Explanation: Standard hydrogen electrode is considered as the primary reference electrode. Calomel electrode whose potential is obtained by connecting it to the standard hydrogen electrode acts as a secondary reference electrode.
What is E vs NHE?
Electrochemical Behavior In the following, E° represents the standard potential, in V, relative to the standard hydrogen electrode (NHE) at 25 °C. Activities are referred to the hypothetical ideal state at unit molality for all solutes involved in the electrode reaction.
What is difference between SHE and NHE?
Technically, a SHE and NHE are different. The NHE measures the potential of a platinum electrode in a 1 N acid solution, while the SHE measures the potential of a platinum electrode in an ideal solution (current standard of zero potential at all temperatures).
What are the two types of electrodes?
There are mainly two types of electrodes namely reactive and inert electrodes. An inert type does not participate in any reaction while reactive types participate actively in reactions. Some commonly used inert electrodes include platinum, gold, graphite(carbon), and rhodium.