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IIT Madras develops a new method to make hydrogen from seawater

Category : Science and Tech
Published on: June 14 2023 Share on facebook

  • Researchers at IIT Madras have discovered a new way to make hydrogen from sea water.
  • IIT-Madras physics department researchers have created key elements for a highly efficient, economically viable method of electrolyzing saltwater to produce hydrogen. The findings were released in the ACS Applied Energy Materials journal.
  • The traditional alkaline water electrolyzer method uses fresh water for electrolysis, consumes a lot of energy, and necessitates an expensive oxide-polymer separator.
  • The IIT-Madras team created an electrolyzer that is more environmentally friendly and utilises less freshwater by using alkaline salt water as the electrolyte rather than pure or fresh water.
  • To prevent corrosion, which is a frequent problem when using seawater, they employed a carbon-based support material for the electrodes instead of metals.
  • To increase the production of both hydrogen and oxygen even in the presence of impurities and chemical deposition on the electrodes, the researchers designed and created transition metal-based catalysts that can catalyse both the oxygen and hydrogen evolution events.
  • Traditional alkaline water electrolysis technology is known to be energy-intensive, requiring an expensive oxide-polymer separator and fresh water for the process. 
  • However, the IIT-Madras researchers have managed to address these challenges by introducing simple, scalable, and cost-effective alternatives that exhibit high efficiency in splitting seawater and producing hydrogen.
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