Template-Free Fabrication of Single Atom Fe-Based Cathodes Unlock High-Performing Anion-Exchange Membrane Fuel Cells.

ABSTRACT: Single-atom catalysts (SACs) possessing well-defined active sites of singular metal atoms have gained prominence in the field of electrocatalysis as they can be tuned to enhance activity and stability. In this study, a critical-raw-material (CRM)-free SAC is synthesized for the oxygen reduction reaction (ORR) in alkaline media by pyrolyzing polyimide nanoparticles and Fe without using a sacrificial template. Upon purification, the resulting catalyst demonstrates outstanding performance as cathodes in anion-exchange membrane fuel cells (AEMFCs) owing to sufficiently stabilized Fe single-atoms at the FeN₄ sites yielding a peak power density (P_max) as high as ∼1.8 W cm^-2 and specific power values up to 11.3 W mgPGM-1${\mathrm{mg}}_{{\mathrm{PGM}}}^{ - 1}$ ; th

SUBMITTER: Douglin JC 

PROVIDER: S-EPMC12520578 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature