The team has successfully tested a sustainable membrane-based seawater electrolyzer.
However, there is a problem. The properties of salt water results in the corrosion of electrodes used in various systems, often making them unviable. The use of polyanion coatings to resist corrosion by chloride ions or highly selective electrocatalysts has not helped enough for practical applications.
“Our strategy realizes efficient, size-flexible, and scalable direct seawater electrolysis in a way similar to freshwater splitting without a notable increase in operation cost,” Shao toldThe team uses a concentrated potassium hydroxide electrolyte solution to dip the electrodes, and a porous membrane helps to separate the electrolyte solution from seawater. The fluorine-rich membrane blocks the liquid water but lets the water vapor pass through.
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