Well-dispersed porous Fe–N–C catalyst towards the high-selective and high-efficiency conversion of CO_(2) to CO

In this study,through direct pyrolysis of a nitrogen-rich metal-organic framework of Fe-BTT at different temperatures and followed by acid treatment,we prepared a series of Fe–N–CT(T=800–1000°C)composite catalysts with uniform cubic morphology and homogeneously distributed active sites.Acid leaching leads to the removal of excess Fe NPs and the exposure of more pyridinic N and porphyrin-like Fe–Nx sites and creates a higher specific surface area.Structural and electrochemical performance test results showed that Fe–N–C900catalyst exhibited the highest selectivity for CO product at–1.2 V vs.Ag/AgCl,with 496 m V of overpotential and 86.8%of Faraday efficiency,as well as excellent long-term stability,due to the good inheritance from rich-N Fe–BTT precursor.