From Guano Wars to Green Chemistry: A New Era of Chemical Production
In the 19th century, global powers engaged in conflicts over islands rich in guano—bird droppings prized for their phosphorus and nitrogen content. These valuable deposits reshaped geopolitical landscapes as nations competed for control of these natural fertiliser resources. Today, the fundamental importance of phosphorus and nitrogen has not diminished; rather, it has become even more critical to modern civilization.
Without nitrogen and phosphorus-based fertilisers, global agriculture would face catastrophic collapse. As Karthish Manthiram, professor at the California Institute of Technology, succinctly states: "We would starve." Beyond agriculture, these essential elements form the chemical backbone of modern life, enabling everything from plastics and pharmaceuticals to the batteries powering our electronic devices.
Infosys Prize 2025 Recognizes Foundational Chemical Innovation
It is this invisible yet foundational chemical world that has earned Professor Manthiram the prestigious Infosys Prize 2025 in physical sciences. His groundbreaking research pioneers a radically different approach to manufacturing essential chemicals—one that could fundamentally reshape global supply chains while reducing dependence on fossil fuels.
This innovation arrives at a particularly critical moment when geopolitical tensions, including ongoing instability in West Asia, continue to threaten fertiliser availability and pricing worldwide. The traditional supply chains for these essential chemicals remain vulnerable to disruption, creating food security concerns across the globe.
Replacing Petroleum with Air and Water
At the heart of Manthiram's revolutionary research lies a deceptively simple concept: replace petroleum with air and water as the foundational building blocks for chemical production. "Whether it's the plastic of a water bottle, the fuel you put into a car, or the pharmaceuticals we ingest, so many of these things come from a petroleum-based supply chain," he explains. "The vision of my research group is to replace that entire paradigm."
Instead of beginning with a barrel of oil, his laboratory starts with nitrogen, carbon dioxide, and water—molecules that are abundant, sustainable, and readily available. The fundamental challenge, however, lies in persuading these stable molecules to react chemically. Nitrogen, which constitutes nearly 80% of the air we breathe, is notoriously inert and resistant to chemical transformation.
"It's a very happy bond," Manthiram says of the nitrogen triple bond. "Breaking it is the hardest step in the entire process."
Electrochemical Revolution Replaces Century-Old Process
For over a century, industrial chemical production has relied on the Haber-Bosch process—a method that uses extremely high temperatures, immense pressures, and substantial fossil fuel inputs to convert nitrogen into ammonia, the essential building block for fertilisers. While effective, this process is notoriously carbon-intensive and environmentally damaging.
Manthiram's innovative approach replaces this brute-force chemistry with electricity as the driving force for chemical reactions. "We are establishing a new paradigm where electricity can be used instead of fossil fuels," he explains. "You can operate at room temperature, at ambient pressure, and simply apply a voltage to drive the necessary chemical transformations."
The implications of this shift are profound and far-reaching. Not only could this eliminate carbon emissions from fertiliser production, but it could also decentralize chemical manufacturing. Instead of requiring massive industrial plants concentrated in specific regions, fertilisers could be produced locally—even by farming communities themselves—using modular devices powered by renewable energy sources.
Addressing Geopolitical Vulnerabilities in Food Systems
This technological breakthrough arrives at a particularly critical moment for global food security. Fertiliser supply chains remain exceptionally vulnerable to geopolitical disruptions, especially in West Asia—a region central to global energy markets. Any significant shock to natural gas supplies, which serve as the key input for conventional ammonia production, creates immediate ripple effects throughout global agriculture.
Manthiram's electrochemical pathways offer a promising solution to insulate food systems from such volatility. By decoupling fertiliser production from fossil fuel inputs and geopolitical tensions, his approach could create more resilient and sustainable agricultural systems worldwide.
A Scientific Legacy and Independent Path
Manthiram carries forward a distinguished scientific legacy as the son of Arumugam Manthiram, a pioneering materials scientist renowned for his groundbreaking work on lithium-ion batteries. Growing up immersed in scientific inquiry, Karthish witnessed firsthand how his father's discovery of lithium iron phosphate—now used in a significant portion of global batteries—required decades to reach commercial scale.
"It shows just how long these scientific journeys can take," he reflects, acknowledging the patience required for transformative innovation. This family legacy was recently visible when the Manthiram family gathered in India for the Infosys Prize ceremony, highlighting how scientific ambition often runs deep within families across generations.
Despite this distinguished lineage, Manthiram has charted his own independent scientific path, frequently embracing ideas that others initially dismissed. When he first proposed his research direction in electrochemical ammonia synthesis, he recalls that "people laughed at me... they said others had tried this approach and failed." The field was littered with irreproducible results and scientific dead ends. "That's the kind of challenge that keeps a scientist up at night," he admits.
Breakthrough Innovations and Practical Solutions
Manthiram's pivotal breakthrough arrived in 2019 when his research team developed a novel electrode design that dramatically accelerated reaction rates. By fundamentally rethinking how nitrogen molecules reach reaction sites, they overcame a critical bottleneck that had plagued the field for decades. "Science is about getting from 0 to 1," he explains. "Then others can take it from 1 to 10."
Indeed, laboratories around the world have since built upon his foundational work, with some research groups even launching startup companies to commercialize these electrochemical approaches.
Another crucial advance addressed the critical issue of cost. Early electrochemical systems relied on lithium—an expensive and increasingly scarce material due to soaring demand from electric vehicle manufacturers. Manthiram's research group discovered an ingenious workaround by pairing sodium with titanium—an abundant and far more economical combination.
"Sodium alone cannot break the nitrogen bond," he clarifies. "But give it a partner like titanium, and the chemical transformation becomes possible." This innovation creates a practical pathway that could make sustainable fertiliser production economically viable at scale.
Beyond Ammonia: Transforming Chemical Manufacturing
Beyond ammonia production, Manthiram's laboratory is advancing electrochemical methods for manufacturing epoxides—essential building blocks for plastics, textiles, and antifreeze products. He describes these as "hidden chemical champions" that permeate modern life while remaining largely invisible to consumers.
The current manufacturing processes for these essential chemicals are environmentally damaging and resource-intensive. Manthiram's electrochemical approaches not only clean up production but also generate hydrogen as a valuable by-product, improving the overall economics and sustainability of chemical manufacturing.
Balancing Scientific Discovery with Practical Implementation
The dual focus on fundamental scientific discovery and engineering scalability is precisely what distinguished Manthiram's work for the Infosys Prize jury. As one juror noted, the achievement lies not merely in discovering a new chemical pathway, but in envisioning how it could be implemented practically without requiring "heavy machinery" or generating pollution.
Commercialization, however, requires careful strategic balancing. While venture capital interest in these technologies is strong and growing, Manthiram maintains a cautious approach. "I want to de-risk one or two more technical pillars before we take this innovation out of the laboratory environment," he states thoughtfully.
This measured approach reflects both scientific rigor and practical wisdom, ensuring that when these transformative technologies do reach commercial scale, they will be robust, reliable, and ready to reshape global chemical production for a more sustainable future.
