As the place where the electrochemical reaction takes place, the catalytic electrode is also the key to determine the hydrogen production efficiency of the electrolytic cell. Most of the electrodes used in the electrolytic cell are nickel based, such as pure nickel mesh and foam nickel. The growth of catalytic chemicals on the nickel based surface fills the electrode material with a large number of micropores, increases the surface area, and greatly increases the contact area between the solution and the electrode, shortens the mass transfer distance, and greatly improves the efficiency of the electrolysis reaction.