RESUMO
As an eco-friendly and sustainable strategy, the electrochemical reduction of nitrite (NO2-) can simultaneous generation of NH3 and treatment of NO2- contamination in the environment. Herein, monoclinic NiMoO4 nanorods with abundant oxygen vacancies self-supported on Ni foam (NiMoO4/NF) are considered high-performance electrocatalysts for ambient NH3 synthesis by reduction of NO2-, which can deliver an outstanding yield of 18089.39 ± 227.98 µg h-1 cm-2 and a preferable FE of 94.49 ± 0.42% at -0.8 V. Additionally, its performance remains relatively stable during long-term operation as well as cycling tests. Furthermore, density functional theory calculations unveil the vital role of oxygen vacancies in promoting nitrite adsorption and activation, ensuring efficient NO2-RR towards NH3. A Zn-NO2- battery with NiMoO4/NF as the cathode shows high battery performance as well.