High‐Efficiency Electroreduction of Nitrite to Ammonia on Ni Nanoparticles Strutted 3D Honeycomb‐Like Porous Carbon Framework

Electroreduction of nitrite (NO2- ) to ammonia (NH3 ) provides a sustainable approach to yield NH3 , whilst eliminating NO2- contaminants. In this study, Ni nanoparticles strutted 3D honeycomb-like porous carbon framework (Ni@HPCF) is fabricated as a high-efficiency electrocatalyst for selective reduction of NO2- to NH3 . In 0.1 M NaOH with NO2- , such Ni@HPCF electrode obtains a significant NH3 yield of 12.04 mg h-1 mgcat.-1 and a Faradaic efficiency of 95.1 %. Furthermore, it exhibits good long-term electrolysis stability.