Ammonia electrosynthesis from nitrate using a stable amorphous/crystalline dual-phase Cu catalyst.

ABSTRACT: Renewable energy-driven electrocatalytic nitrate reduction reaction presents a low-carbon and sustainable route for ammonia synthesis under mild conditions. Yet, the practical application of this process is currently hindered by unsatisfactory electrocatalytic activity and long-term stability. Herein we achieve high-rate ammonia electrosynthesis using a stable amorphous/crystalline dual-phase Cu catalyst. The ammonia partial current density and formation rate reach 3.33 ± 0.005 A cm^-2 and 15.5 ± 0.02 mmol h^-1 cm^-2 at a low cell voltage of 2.6 ± 0.01 V, respectively. Remarkably, the dual-phase Cu catalyst can maintain stable ammonia production with a Faradaic efficiency of around 90% at a high current density of 1.5 A cm^-2 for up to 300 h. A scale

SUBMITTER: Wang Y 

PROVIDER: S-EPMC11751377 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature