University of Michigan Chemists Developed Nitrate Catalyst

Researchers created a plant-inspired iron catalyst that converts nitrate into ammonia at room temperature.

Updated on Sept. 27, 2026 in Chemistry

Close-up macro view of a swirling sapphire-blue liquid inside a laboratory glass vessel under bright, sterile lighting. — University of Michigan chemists have engineered a plant-inspired iron catalyst capable of converting stubborn nitrate contaminants into ammonia at room temperature. AI Illustration. Upload story photo >

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University of Michigan chemists have successfully developed a plant-inspired catalyst that transforms nitrate into ammonia. The breakthrough offers a new path for processing stubborn nitrate contaminants into useful chemical products.

Why it matters

Nitrate is notoriously difficult to process because its nitrogen atom remains tightly bound to three oxygen atoms. This new method provides a way to break these strong bonds, potentially leading to a more circular approach to water treatment.

The study utilized an iron compound encircled by hydrogen bonds, which binds nitrate up to 10 million times more strongly than control versions using zinc. The light-driven process achieved a conversion rate of 5,000 nitrate molecules per catalyst molecule.

The players

University of Michigan

This public research university in Ann Arbor is a major center for scientific innovation and academic inquiry.

Nature Chemistry

This peer-reviewed monthly scientific journal publishes high-quality research across all areas of chemistry.

The details

By mimicking plant proteins that naturally capture nitrate through hydrogen bonds, the catalyst forces a reduction step in the nitrate structure. While the light-driven process proved highly efficient, the catalyst also produced nitric oxide when heated, where it converted 87 nitrate molecules per catalyst.

September 27, 2026: The research study was published in the journal Nature Chemistry.

The Big Picture

This discovery shifts the trajectory of nitrate reduction by validating the use of hydrogen-bond mimicry to bypass traditional energy-intensive hurdles. It provides a new theoretical framework for chemical synthesis that could bridge the gap between biological efficiency and synthetic chemistry.

While currently in the laboratory phase, this catalyst design could eventually lead to more effective water purification technologies. The ability to convert waste nitrates into ammonia suggests potential future utility in sustainable fertilizer production and industrial chemical recycling.

The takeaway

This research demonstrates that complex biological bonding strategies can be successfully replicated in the lab to solve stubborn chemical problems. These findings underscore the potential for synthetic catalysts to mimic natural processes to address environmental pollutants.