Yes—in a 2024 laboratory study, researchers used an electrochemical process to turn nitrogen from air into nitrate at room temperature. The reported results are promising, but they do not establish a commercial process: yield, current density and scale-up remain challenges.
What the researchers made—and how
Dong and colleagues reported an electricity-driven route for nitrogen oxidation in Nature Synthesis. Its target product is nitrate, not ammonia. The study appeared online on 19 April 2024; its issue date is June 2024. Read the paper in Nature Synthesis.
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In aqueous electrochemical systems, nitrogen oxidation competes with oxygen evolution, a reaction that can consume current without making the desired nitrate. The reported method uses hydroxyl radicals produced through hydrogen peroxide decomposition as the active oxygen source, rather than relying on the competing oxygen-evolution route.
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The team investigated nitrogen activation and the reaction mechanism using in situ electrochemical mass spectrometry, gas-phase infrared spectroscopy and electron paramagnetic resonance spectroscopy. These measurements support the study’s mechanistic investigation; they do not amount to a single protocol that resolves reproducibility questions across the wider field.
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What the reported performance figures mean
Dong et al. report 25.6% Faradaic efficiency and a nitrate yield of 8.3 nmol s−1 cm−2 in their electrochemical tests. Faradaic efficiency describes the share of electrical charge directed to the desired reaction; the yield figure expresses nitrate production per unit electrode area and time. Both figures describe the study’s laboratory tests—not industrial output or a product available for purchase.
How this differs from established nitrogen processing
Conventional nitrogen processing uses the Haber–Bosch route to make ammonia and the Ostwald route to make nitric acid and nitrate-related products. The relevant stages are energy-intensive and require high temperatures and pressures, according to Chemistry World’s report on the study. The electrochemical approach is attractive because it operates at room temperature and pressure and aims directly at nitrate.
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| Approach | Conditions and pathway | Main issue discussed | Readiness |
|---|---|---|---|
| Haber–Bosch followed by Ostwald processing | Established route; energy-intensive stages require high temperatures and pressures. Produces ammonia first, then processes it toward nitric acid and nitrate-related products. | Energy-intensive processing. | Established industrial routes. |
| Hydrogen-peroxide-mediated electrochemical nitrogen oxidation | Study reports operation at room temperature and pressure, directly targeting nitrate from nitrogen. | Competing reactions, low yield per time and volume, and the challenge of raising current density while maintaining selectivity. | Laboratory research; industrial-scale potential is not established. |
The available reporting does not quantify a lifecycle emissions or energy advantage for the electrochemical route, so room-temperature operation alone is not proof of a lower overall environmental impact.
Why it is not yet a fertilizer-making replacement
Nitrate is relevant to fertilizer, but a possible application is not the same as a commercially available production process or evidence that this method is displacing established routes. Electrochemical systems also face challenges including nitrate contamination and electrode degradation. The hydrogen-peroxide strategy is intended to address competition from oxygen evolution, but it does not by itself resolve the remaining scale-up constraints.
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Yifu Yu, a Tianjin University researcher not involved in the study, told Chemistry World: “Presently, the yield is too low per unit time and volume,” noting that the larger reactor this could require would increase fixed-asset investment. The report identifies increasing current density while preserving selectivity as a key difficulty.
Study lead author Kai Dong said further development is needed: “further research and development efforts are needed to overcome existing challenges and realise its full potential on an industrial scale”. The quotation was reported by Victoria Corless in Chemistry World on 17 June 2024.
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