Monash reports ammonia electrode advance, with scale-up still to prove

Monash University in Melbourne, Australia, announced on October 8 that researchers working with RMIT University had developed a gallium-based electrode that addresses an energy limitation in making ammonia with electricity. The laboratory advance could help develop renewable production of a key fertilizer ingredient, but it has not established commercial savings.

In its announcement published by Phys.org, Monash describes the work as a proof of concept: changing the chemistry of the cathode, an electrode in the process, allows ammonia formation at more favorable electrical potentials. The university says further improvements are needed to reach proposed commercial targets.

How gallium changes the ammonia electrode

The established electrochemical approach described by Monash uses lithium to activate nitrogen gas. Nitrogen is exceptionally stable, making it difficult to convert into ammonia. Although the lithium-mediated method can produce ammonia at practical rates, the university says its chemistry imposes an intrinsic limit on energy efficiency.

Instead of depositing lithium metal on a conventional electrode, the team used gallium-based materials that combine with lithium to form alloys. According to Monash, this changes the electrical potential needed for the reaction while retaining the ability to activate nitrogen and produce ammonia.

Emeritus professor Douglas MacFarlane said lithium-alloying materials broaden the cathode chemistry available to researchers. He described opportunities to explore different material combinations that can activate nitrogen under relatively mild conditions. The announcement identifies the study as published in Cell Press Blue.

What the 96% efficiency figure measures

Under optimized experimental conditions, the researchers reported a faradaic efficiency of 96% ± 6%. That measures how much electrical current goes toward producing ammonia. It does not mean that 96% of the energy supplied to the process becomes useful product.

Separately, Monash says the findings could support future ammonia production with an estimated energy efficiency of at least 22%. This is a prospective estimate, distinct from the measured current selectivity. The announcement does not establish a demonstrated full-system energy efficiency or a quantified reduction in production costs.

The announcement also does not specify the commercial targets that further improvements would need to meet. It gives no run duration, electrode area or detailed explanation of the reported ±6% uncertainty. Those omissions limit what can be concluded about the result’s operating conditions and sustained performance.

Why ammonia production matters for fertilizer emissions

Agriculture is the main downstream sector. In its 2021 Ammonia Technology Roadmap, the International Energy Agency estimated that about 70% of ammonia was used for fertilizers. Other uses included plastics, explosives and synthetic fibers. Ammonia connects nitrogen from the air with the mineral nitrogen fertilizers used to grow food.

That roadmap put ammonia production at roughly 2% of global final energy consumption and 450 million tonnes of direct carbon-dioxide emissions. Just over 70% of production used natural-gas steam reforming, with most of the remainder relying on coal gasification. These are historical sector estimates, not updated 2026 totals.

Cleaner manufacture would address only part of fertilizer’s climate footprint. The IEA estimated in the same roadmap that emissions during use exceeded 70% of nitrogen fertilizers’ lifecycle emissions. Its analysis provides industrial and environmental context; it does not validate the new Monash electrode or its projected performance.

Practical electrolyzers are the next test

Monash professor Alexandr Simonov identified integration of the new cathodes into electrolyzer prototypes that more closely resemble practical production conditions as the next step. He also said the team was working to scale up the cathodes and demonstrate sustained ammonia production at competitive energy efficiency.

The university envisages decentralized production using renewable electricity closer to where ammonia is needed. It contrasts that prospect with conventional large, centralized facilities, which cannot readily exploit geographically scattered or stranded renewable resources. The announcement does not document an operating commercial installation or quantify an effect on fertilizer prices.

Electrode durability, gallium requirements, materials recovery and scale-up economics remain unestablished. For now, the reported result expands the chemistry researchers can test; whether it can deliver sustained, economical ammonia production is the practical question the planned prototypes must address.