Researchers at Indian Institute of Technology Guwahati have developed an innovative electrode coating technology that significantly improves the efficiency and durability of green hydrogen production through solar-powered water splitting.
What is Innovation?
- The research has been published in the journal Small.
- It focuses on Photo-Assisted Electrochemical Water Splitting, a process that uses sunlight to split water into hydrogen and oxygen.
- Green hydrogen produced through this method can help decarbonise sectors such as steel, fertilisers, refining and heavy transport.
Key Challenge Addressed
Conventional solar water-splitting systems face two major problems:
- Catalyst Delamination: Catalyst coatings gradually peel off from electrodes, reducing efficiency and lifespan.
- Gas Bubble Accumulation: Hydrogen and oxygen bubbles stick to electrode surfaces, blocking active sites and lowering output.
How Does New Technology Work?
Researchers developed a composite coating using:
- Graphitic Carbon Nitride (a two-dimensional photocatalyst).
- Bubble-repellent Hydrogel.
- Porous Nickel Foam substrate.
Unlike conventional methods, the photocatalyst is embedded within the coating structure, improving adhesion and stability.
The design enables faster bubble release, keeping catalytic surfaces active.
Major Outcomes
The technology achieved:
- 51% higher hydrogen production.
- 44% higher oxygen production compared to conventional systems.
It enhances system durability and can reduce the cost of green hydrogen generation.
Related Government Initiative
Supports the objectives of the National Green Hydrogen Mission (2023), launched by the Ministry of New and Renewable Energy.
The mission aims to make India a global hub for the production, utilisation and export of green hydrogen.
Important Terms
- Green Hydrogen: Hydrogen produced using renewable energy without carbon emissions.
- Photo-Assisted Electrochemical Water Splitting: A process that uses sunlight and electrochemical reactions to split water into hydrogen and oxygen.
- Photocatalyst: A material that accelerates chemical reactions using light energy.
Exam Hook (Prelims)
Q. Consider the following statements regarding Green Hydrogen:
- Green hydrogen is produced using renewable energy sources.
- Photo-assisted electrochemical water splitting uses sunlight to separate water into hydrogen and oxygen.
- Green hydrogen production releases carbon dioxide as a by-product.
Which of the statements given above are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Answer: (a) 1 and 2 only
One-Line Wrap
IIT Guwahati’s new composite coating technology marks a significant step towards making green hydrogen production more efficient, durable and affordable, supporting India’s clean energy transition.
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