Synergistic electroreduction of nitrate to ammonia via bimetallic Fe-Cu sites supported on hierarchical porous carbon

Published: April 1, 2025

Language: Английский

Multi-Functional Amorphous Nickel Phosphide Electrocatalytic Reduction of Nitrate for Ammonia Production: Unraveling the Anode-Driven Enhancement Mechanism

Sustainability, Journal Year: 2025, Volume and Issue: 17(9), P. 3835 - 3835

Published: April 24, 2025

The electrocatalytic reduction of nitrate (ERN) to ammonia offers a promising route address energy shortages and environmental pollution, but its practical application is hindered by low selectivity due complex eight-electron transfer pathways high consumption (EC) from the kinetically sluggish oxygen evolution reaction (OER). This study proposes dual strategy: (1) designing multi-functional self-supported ANP electrode via vapor deposition enhance ERN activity (2) replacing OER with thermodynamically favorable anodic reactions (urea oxidation (UOR), sodium metabisulfite (S(IV)OR), sulfite urea (S(IV)/UOR)) reduce EC. cathode achieved removal rate (R%) 97.7%, (SE%) 91.8%, Faradaic efficiency (FE) 97.3% at −1.2 V, an yield 0.0616 mmol h−1 mg−1 EC 8.239 kWh/kg, while in situ-generated atomic hydrogen (*H) was identified as key improving selectivity. Replacing alternative significantly improved system efficiency: UOR reduced 17.5%, S(IV)OR saved 27.6% 7.1% higher yield, hybrid S(IV)/UOR 32.1% lower 12.6% greater than OER. These differences stemmed variations cell voltage production rates. work provides viable approach for selective nitrate-to-ammonia conversion guides design energy-efficient systems sustainable nitrogen recovery.

Language: Английский

Electrocatalytic N–H bond transformations: a zero-carbon paradigm for sustainable energy storage and conversion

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Electrocatalytic zero-carbon energy systems based on the N–H bond have achieved a complete cycle of storage and conversion, providing guidance for application clean conversion.

Language: Английский