Cu-modified CoSe2 nanoarrays for efficient electrocatalytic nitrite reduction to ammonia

Abstract

Electrochemical nitrite reduction is a potential way to achieve ammonia electrosynthesis, nitrite-containing sewage disposal, and energy supply simultaneously. Herein, a novel Cu–CoSe₂ electrocatalyst was synthesized for nitrite reduction, which achieves an impressive NH₃ yield of 4.79 mmol h⁻¹ cm⁻², and a high NH₃ faradaic efficiency of 98.7% at −0.3 V vs. RHE in alkaline solution.