Effect of the Thermal Treatment of Fe/N/C Catalysts for the Oxygen Reduction Reaction Synthesized by Pyrolysis of Covalent Organic Frameworks.

ABSTRACT: A nitrogen-containing covalent organic framework obtained from the polymerization of 1,3-dicyanobenzene has been used as a starting material for the synthesis of Fe/N/C catalysts for the oxygen reduction reaction (ORR). In this work we report the effect of the thermal treatments on the nature and catalytic properties of the catalysts obtained after the thermal treatments. After the first thermal treatment, the catalysts obtained contain metallic iron and iron carbide particles, along with a minority fraction of inorganic FeN _x sites. After acid leaching and a second thermal treatment, FeN _x sites remain in the catalysts, along with a minor fraction of graphite-wrapped Fe₃C particles. Both catalysts display high activity for the ORR, with the c

SUBMITTER: Garcia A 

PROVIDER: S-EPMC8719314 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature