High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO Nanoribbon Array.

Electrochemical nitrite (NO) reduction is recognized as a promising strategy for synthesizing valuable ammonia (NH) and degrading NO pollutants in wastewater. The six-electron process for the NO reduction reaction is complex and necessitates a highly selective and stable electrocatalyst for efficient conversion of NO to NH. Herein, a FeP nanoparticle-decorated TiO nanoribbon array on a titanium plate (FeP@TiO/TP) is proposed as an efficient catalyst for NH production under ambient conditions. In 0.1 M NaOH with 0.1 M NO, such a FeP@TiO/TP affords a large NH yield of 346.6 μmol h cm and a high Faradaic efficiency of 97.1%. Additionally, it demonstrates excellent stability and durability during long-term cycling tests and electrolysis experiments.