High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO2 Nanoribbon Array

A FeP@TiO2 nanoribbon array on a titanium plateserves as a highly efficient and durable catalyst for the electroreductionof nitrite (NO2 (-)) to ammonia (NH3), achieving a large NH3 yield of 346.6 & mu;molh(-1) cm(-2) and a high Faradaic efficiencyof 97.1%. Electrochemicalnitrite (NO2 (-)) reductionis recognized as a promising strategy for synthesizing valuable ammonia(NH3) and degrading NO2 (-) pollutantsin wastewater. The six-electron process for the NO2 (-) reduction reaction is complex and necessitates a highlyselective and stable electrocatalyst for efficient conversion of NO2 (-) to NH3. Herein, a FeP nanoparticle-decoratedTiO(2) nanoribbon array on a titanium plate (FeP@TiO2/TP) is proposed as an efficient catalyst for NH3 production under ambient conditions. In 0.1 M NaOH with 0.1 M NO2 (-), such a FeP@TiO2/TP affordsa large NH3 yield of 346.6 & mu;mol h(-1) cm(-2) and a high Faradaic efficiency of 97.1%.Additionally, it demonstrates excellent stability and durability duringlong-term cycling tests and electrolysis experiments.