Scientists were able to electrolyze seawater for up to 1,000 hours and at the same current density used in industrial electrolyzers.
Often referred to as the"Holy Grail" of energy storage, the economical and efficient conversion of water into hydrogen and oxygen with electricity has been a goal of scientists for decades.
A typical electrolyzer consists of two metal electrodes—anode and cathode—that are immersed in an electrolyte solution and separated by a membrane. When electricity is passed through the solution, oxygen bubbles off the anode and hydrogen bubbles off the cathode. To minimize the amount of energy required to liberate the hydrogen from water, both electrodes are typically coated with a catalyst.
The anode in this study consisted of a porous nickel foam current collector coated with a highly active and inexpensive catalyst made out of nickel and iron. The catalyst itself is not prone to corrosion but the underlying metallic conductor is more reactive and easily becomes corroded when in contact with a chloride solution.
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