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℃)com-posite catalysts with uniform cubic morphology and homogeneously distributed active sites.Acid leach-ing 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-C900 catalyst exhibited the highest selectivity for CO product at-1.2 V vs.Ag/AgCl,with 496 mV 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.