A Cornell-led collaboration has hit the trifecta of sustainability technology: The group developed a low-cost method to produce carbon-free "green" hydrogen via solar-powered electrolysis of seawater. A happy byproduct of the process? Potable water.
The team's hybrid solar distillation-water electrolysis (HSD-WE) device, reported in Energy & Environmental Science, currently produces 200 milliliters of hydrogen per hour with 12.6% energy efficiency directly from seawater under natural sunlight. The researchers estimate that within 15 years, the technology could reduce the cost of green hydrogen production to $1 per kilogram—a key step in achieving net-zero emissions by 2050.
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