Combining Fe nanoparticles and pyrrole-type Fe-N₄ sites on less-oxygenated carbon supports for electrochemical CO₂ reduction.

ABSTRACT: A great challenge for electrochemical CO₂ reduction is to improve energy efficiency, which requires reducing overpotential while increasing product Faraday efficiency. Here, we designedly synthesize a hybrid electrocatalyst consisting of Fe nanoparticles, pyrrole-type Fe-N₄ sites and less-oxygenated carbon supports, which exhibits a remarkable CO Faraday efficiency above 99% at an ultralow overpotential of 21 mV, reaching the highest cathode energy efficiency of 97.1% to date. The catalyst also can afford a CO selectivity nearly 100% with a high cathode energy efficiency (>90%) at least 100 h. The combined results of control experiments, in situ characterizations and theoretical calculations demonstrate that introducing Fe nanoparticles can reduce the overpotential by

SUBMITTER: Wang C 

PROVIDER: S-EPMC10444801 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature