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

Abstract Electroreduction of nitrite (NO 2 − ) to ammonia (NH 3 ) provides a sustainable approach to yield NH 3 , whilst eliminating NO 2 − 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 NO 2 − to NH 3 . In 0.1 M NaOH with NO 2 − , such Ni@HPCF electrode obtains a significant NH 3 yield of 12.04 mg h −1 mg cat. −1 and a Faradaic efficiency of 95.1 %. Furthermore, it exhibits good long‐term electrolysis stability.