CoSe2 hollow nanoboxes for enhanced electrocatalytic nitrate reduction toward ammonia synthesis

Abstract

Herein, CoSe₂ supported on hollow nanobox carbon is developed as a high-performance catalyst for nitrate electroreduction. The observed catalytic activity is mainly influenced by the hollow CoSe₂ nanostructure, which effectively increases the availability of active sites, as well as the conductive nitrogen-doped carbon matrix that facilitates charge transfer. As a result, the catalyst achieves a maximum faradaic efficiency of 88.1% and an impressive NH₃ yield rate of 573.4 μmol h⁻¹ mg⁻¹.