How did Moissan prepare fluorine? What are the modifications done  to his method?

Moissan first prepared fluorine in 1886 through the electrolysis of anhydrous hydrofluoric acid (HF). He used a platinum electrode and a mixture of potassium bifluoride (KF·HF) as the electrolyte. When an electric current was passed through the electrolyte, it decomposed, producing fluorine gas at the anode and hydrogen gas at the cathode. The reaction in the cell was:

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