Dual-atomic catalyst enables nitrate-to-nitrogen conversion. (IMAGE)

Nanjing Institute of Environmental Sciences, MEE

Dual-atomic catalyst enables nitrate-to-nitrogen conversion.

Caption

Illustration of the double-shelled mesoporous carbon sphere catalyst with dual single-atomic sites. The inner Fe–N₄ centers drive nitrogen–nitrogen coupling, while the outer Mg–N₄ layer acts as a proton fence, steering the reaction toward harmless nitrogen gas (N₂) instead of ammonia. This design achieves high nitrate removal and exceptional selectivity, offering a sustainable solution for clean water treatment.

Credit

Eco-Environment & Health

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CC BY

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