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RHE Reversible Hydrogen Electrode

Troubleshooting

Observation Potential cause Corrective
Wrong potential Air bubble on the tip of RHE or Double junction chamber Check the existence of air bubble and retry the electrolysis for removing the air.
Leaking hydrogen gas Check if the tube connection or tubing clamp is loosen or not.
Exchange your electrode for new one, when you find some defect.
Intrusion of atmosphere Hydrogen gas may replace the air after a fez days. Please retry electrolysis.
Wrong concentration of H+ in the solution Change the solution to the new one.
Unstable potential Air bubble on the tip of RHE or double junction chamber Check the existence of air bubble and retry the electrolysis for removing the air.
Closed silicone tube Deterioration of silicone tube Cut the clogged tube or replace with the new silicone tube.
Imperfect removal of inner solution Surface tension
Dirty inner wall of electrode
Rinse the inner wall by a portion of ethanol and remove water.
Current overflow during electrolysis Low current limit of potentiostat Use commercial battery (from 3 V to 5 V) instead of your potentiostat by connecting the minus with your Reversible Hydrogen Electrode (RHE) by holding hydrogen gas up to the level, as shown in the photoon the right. Level of the gas and solution
Long time of electrolysis Low concentration of H+ in the solution Increase the setting negative electrolysis potential, more negative potencial.
Leaking hydrogen gas Check if the tube connection or tubing clamp is loosen or not.


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