Reversible Hydrogen Electrode (RHE) is the reversible electrode kit, in which the hydrogen gas is generated by electrolysis of strong acid then stored. It makes unnecessary the complicated and dangerous set-up of the hydrogen cylinder and avoids the large volume of hydrogen gas exhaustion, even though it has a good potential stability.
The RHE has a large application field, it can be used in a strong acid solution (<pH 2), such as 0.5 mol/L sulfuric acid, also in a neutral solution, when it is applied with a double junction chamber.
Manuals are available for download here.
Set up of the electrode
RHEK Reversible hydrogen electrode kit only
RHEK Reversible hydrogen electrode kit can be used without “Double junction chamber” when the electrolyte solution is strong acid (<ph2),
such as 0.5 mol/L sulfuric acid.</ph2),
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Set the RHE Reversible hydrogen electrode and the counter electrode to the electrochemical cell, which contains the strong acid solution. “Disposable syringe” is attached to the open end of “Silicone tube”. After confirming whether “Tubing clamp” is released, pull the plunger of the syringe to fill the solution in the electrode. Please check if the liquid level in Silicone tube reaches to the white arrow and there is not any air bubbles in the electrode by looking before closing the tubing clamp. |
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RHEK with Double junction chamber kit
Use this chamber when weak acid, neutral solution, solution containing scum, etc., is used.
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Fit the “Double junction chamber cap” on the chamber with a counter electrode and hold it by something like test tube stand or voltammetry cell. Do not touch the bottom of the tip of the chamber during the preparation. | |
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Set the RHE, which was previous preparing with a syringe and tubing clamp setting (see the picture at the left), into the PTFE cap hole. Check if the electrode liquid junction is immersed to the solution. | |
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RHE Specifications
Reversible Hydrogen Electrode (cat#13374) | |
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Length | 85 mm |
Diameter | Head: 14 mm Neck: 6 mm |
Temperature range | 5°C to 60°C |
pH range (using with Double junction chamber) |
0 to 2 0 to 9 |
Double junction chamber specifications
Double junction chamber (cat#13376) | |
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Length | 140 mm |
Diameter | Head: 12 mm Neck: 6 mm |
Reversible hydrogen electrode kit
The Reversible hydrogen electrode (RHE) kit can be used without Double junction chamber when strong acid (
Double junction chamber kit
The Double junction chamber kit is used when the electrolyte solution is a weak acid, neutral solution, solution containing scum etc.