Structural Construction of Bi-Anchored Honeycomb N-Doped Porous Carbon Catalyst for Efficient Co2 Conversion

•Homogeneous Bi nanoparticles diffused in nitrogen-doped carbon frame catalyst constructed by an in-situ pyrolysis process.•Faradaic efficiency of formate (FEHCOOH) of Bi@NCFs catalyst is higher than 79% in the potential range of −0.8～-1.3 V vs. RHE, of which FEHCOOH is as high as 95.70% at −1.0 V vs. RHE.•The FEHCOOH still preserves over 81.3% after 48 h stability test.•The synergy between honeycomb-like porous carbon framework and Bi NPs exhibits unique CO2RR performance.