Heterogeneous Electrochemical Ammonia Oxidation with a Ru-bda Oligomer Anchored on Graphitic Electrodes via CH-π Interactions.

ABSTRACT: Molecular catalysts can promote ammonia oxidation, providing mechanistic insights into the electrochemical N₂ cycle for a carbon-free fuel economy. We report the ammonia oxidation activity of carbon anodes functionalized with the oligomer {[Ru^II(bda-κ-N ² O ²)(4,4'-bpy)]₁₀(4,4'-bpy)}, Rubda-10, where bda is [2,2'-bipyridine]-6,6'-dicarboxylate and 4,4'-bpy is 4,4'-bipyridine. Electrocatalytic studies in propylene carbonate demonstrate that the Ru-based hybrid anode used in a 3-electrode configuration transforms NH₃ to N₂ and H₂ in a 1:3 ratio with near-unity faradaic efficiency at an applied potential of 0.1 V vs Fc^+/0, reaching turnover numbers of 7500. X-ray absorption

SUBMITTER: Beiler AM 

PROVIDER: S-EPMC9841602 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature