Direct Eight-Electron N₂O Electroreduction to NH₃ Enabled by an Fe Double-Atom Catalyst

Nano Letters, Journal Year: 2024, Volume and Issue: 24(28), P. 8502 - 8509

Published: July 1, 2024

N2O is a dominant atmosphere pollutant, causing ozone depletion and global warming. Currently, electrochemical reduction of has gained increasing attention to remove N2O, but its product worthless N2. Here, we propose direct eight-electron (8e) pathway electrochemically convert into NH3. As proof concept, using density functional theory calculation, an Fe2 double-atom catalyst (DAC) anchored by N-doped porous graphene (Fe2@NG) was screened out be the most active selective for electroreduction toward NH3 via novel 8e pathway, which benefits from unique bent adsorption configuration. Guided theoretical prediction, Fe2@NG DAC fabricated experimentally, it can achieve high N2O-to-NH3 Faradaic efficiency 77.8% with large yield rate 2.9 mg h–1 cm–2 at −0.6 V vs RHE in neutral electrolyte. Our study offers feasible strategy synthesize pollutant simultaneous removal.

Language: Английский

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Electroreduction of Nitrite to Ammonia Over Ni₁Ru Single‐Atom Alloys

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(3)

Published: Oct. 3, 2023

Abstract Electroreduction of nitrite to ammonia (NO 2 RR) holds great promise for concurrently achieving efficient NH 3 electrosynthesis and wastewater purification. This study first develops Ni 1 Ru single‐atom alloys as an robust NO RR catalyst. Extensive experiments theoretical computations reveal that isolated atoms electronically couple their adjacent render with high thermodynamic stability, boosted − ‐to‐NH hydrogenation energetics suppressed hydrogen evolution. As a result, assembled in flow cell shows exceptional yield rate 37.5 mg h −1 cm −2 ‐Faradaic efficiency 93.9% at current density 312.3 mA , representing one the highest performances ever reported.

Language: Английский

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Strategies and applications of electrocatalytic nitrate reduction towards ammonia

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 506, P. 215723 - 215723

Published: Feb. 26, 2024

Language: Английский

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p-d hybridized In-Co dual sites promote nitrite electroreduction to ammonia at high current density

Nano Energy, Journal Year: 2024, Volume and Issue: 125, P. 109594 - 109594

Published: April 6, 2024

Language: Английский

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Electrocatalytic upgrading of nitrogenous wastes into value-added chemicals: A review

Materials Today, Journal Year: 2024, Volume and Issue: 73, P. 208 - 259

Published: Feb. 7, 2024

Language: Английский

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