Efficient ammonia synthesis via electroreduction of nitrite using single-atom Ru-doped Cu nanowire arrays

Here, we report the highly active and selective electrocatalytic reduction of NO2− ions to value-added NH3 over a single-atom Ru-modified Cu nanowire array on three-dimensional copper foam (Ru–Cu NW/CF) under ambient conditions. The obtained Ru–Cu NW/CF catalyst exhibited a maximum faradaic efficiency of 94.1% and an NH3 yield up to 211.73 mg h−1 cm−2 (0.732 mmol h−1 cm−2), which was approximately five times higher than that of the Cu NW/CF catalyst.