Scientists supported by the Department of Science and Technology have created a new porous material that can replace expensive platinum in clean-energy devices, potentially making technologies like zinc-air batteries and fuel cells far cheaper to produce. The breakthrough, published in Science Advances, demonstrates that specially designed organic compounds made from common elements can match the performance of platinum without using any precious metals.
Key facts
- Research teams from S. N. Bose National Centre for Basic Sciences, Kolkata; Institute of Nano Science and Technology, Mohali; and SRM University, Amaravati collaborated on the project
- The new material, called TTT-DHTD, achieved 96% of platinum’s performance in laboratory tests
- The catalyst remained stable for 120 hours of continuous operation without degradation
- The material is composed of abundant elements: carbon, sulfur, nitrogen and hydrogen
- Research published in Science Advances journal
Understanding the problem and the solution
Zinc-air batteries represent an attractive next-generation energy storage technology because they use abundant, inexpensive zinc while drawing oxygen directly from the air. This eliminates the need to store cathode material inside the battery, reducing weight and cost compared to traditional lithium-ion batteries. Zinc-air batteries also offer higher theoretical energy density and improved safety.
However, both zinc-air batteries and hydrogen fuel cells depend on an efficient chemical process called the oxygen reduction reaction (ORR). Currently, platinum serves as the catalyst that speeds up this reaction in most clean-energy technologies. Platinum is one of Earth’s rarest and most expensive metals, making large-scale deployment of these technologies economically unfeasible. Finding a platinum-free catalyst that performs comparably has therefore become critical for affordable clean energy.
How the new material works
The TTT-DHTD material is a metal-free organic compound with an ultra-porous, honeycomb-like structure made entirely from carbon, sulfur, nitrogen and hydrogen. According to the research team led by Dr. Pradip Pachfule, Prof. Ramendra Sundar Dey and Prof. Ranjit Thapa, the material’s carefully engineered molecular structure creates ideal sites where oxygen molecules can attach and react efficiently, enabling quick conversion of oxygen into electricity.
In laboratory tests, TTT-DHTD achieved approximately 96% of the performance level of commercial platinum catalysts. Remarkably, the material maintained this performance level even after 120 hours of continuous operation without the degradation or contamination that typically affects conventional metal-based catalysts. Computer simulations helped researchers understand why the material performs so effectively at accelerating the oxygen reduction reaction.
Benefits for clean-energy technologies
Replacing platinum with this inexpensive organic material could dramatically reduce manufacturing costs for zinc-air batteries, making several applications more affordable and accessible. These include clean transportation systems, portable power devices and renewable energy storage solutions.
Compared to hydrogen fuel cells, zinc-air batteries offer additional advantages. They provide a simpler, more compact energy storage solution that does not require high-pressure hydrogen storage infrastructure or extensive distribution networks. However, both technologies depend equally on efficient oxygen electrochemistry, so improvements in catalysts benefit both approaches to clean energy.
Significance for India’s research landscape
The research demonstrates India’s growing capability in sustainable materials science. By combining innovative molecular design with advanced computational studies, Indian scientists have shown that earth-abundant materials can match the performance of precious metals in critical clean-energy reactions. This strengthens India’s position in developing cost-effective solutions to global energy challenges.
What this means for you
If this technology is successfully scaled for commercial production, consumers could eventually benefit from cheaper and more durable clean-energy devices. Affordable zinc-air batteries could power electric vehicles at lower cost, and small portable power systems could become more practical for everyday use. Long-term, widespread adoption of such technologies could make renewable energy storage more economically viable.