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Green Hydrogen - Recent development UPSC NOTE

 

  • Researchers from IIT-Madras have developed critical components to efficiently electrolyze seawater and generate hydrogen

  • offering a highly efficient and cost-effective method.

  • Traditional alkaline water electrolysis technology is energy-intensive

  • It requires an expensive oxide-polymer separator, and uses fresh water

  • The IIT-Madras team has addressed these challenges with innovative alternatives.

  • The team developed an electrolyzer that uses alkaline seawater instead of pure or fresh water, making it more suitable for sustainable hydrogen production.

  • The use of a carbon-based support material for the electrodes minimizes the risk of corrosion, improving the durability of the electrolyzer.

  • The researchers designed and developed catalysts based on transition metals that efficiently catalyze both the oxygen and hydrogen evolution reactions, enhancing the production of hydrogen and oxygen.

  • A novel cellulose-based separator allows hydroxide ions to pass through while preventing the crossover of hydrogen and oxygen. 

  • It offers an economical and resistant alternative to the expensive zirconium oxide-based separators.

  • The optimized parameters and catalysts enable simultaneous and enhanced production of hydrogen at the cathode and oxygen at the anode, overcoming challenges like impurity adsorption and hypochlorite formation.

  • The system can directly use photovoltaic-derived voltage for green hydrogen production.

  • Two prototypes of different dimensions were developed to assess viability. 

  • The smaller electrolyzer produces hydrogen at a rate of 250 ml per hour, while the larger one produces about one liter per hour. 

  • A stack of three cells produced approximately four liters per hour.


Potential Impact: 

  • It opens up possibilities for efficient and cost-effective green hydrogen production using seawater electrolysis

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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Green Hydrogen - Recent development UPSC NOTE
Green Hydrogen - Recent development UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
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