Role of Structural and Compositional Changes of Cu₂O Nanocubes in Nitrate Electroreduction to Ammonia.

ABSTRACT: Nitrate electroreduction reaction (NO₃RR) to ammonia (NH₃) still faces fundamental and technological challenges. While Cu-based catalysts have been widely explored, their activity and stability relationship are still not fully understood. Here, we systematically monitored the dynamic alterations in the chemical and morphological characteristics of Cu₂O nanocubes (NCs) during NO₃RR in an alkaline electrolyte. In 1 h of electrolysis from -0.10 to -0.60 V vs RHE, the electrocatalyst achieved the maximum NH₃ faradaic efficiency (FE) and yield rate at -0.3 V (94% and 149 μmol h^-1 cm^-2, respectively). Similar efficiency could be found at a lower overpotential (-0.20 V vs RHE) in long-term electrolysis. At -0.20 V vs RHE

SUBMITTER: Messias I 

PROVIDER: S-EPMC11480975 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature