Dual Metal Fe-Mn-N-C Sites with Improved Stability for the Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cell.

ABSTRACT: Low-cost and durable hydrogen fuel cells are crucial for the success of the hydrogen economy. While Fe-N-C catalysts are amongst the most promising low-cost alternative to platinum (Pt) for the oxygen reduction reaction, their unsatisfactory durability is the grand challenge faced by the field due to iron demetallation, carbon corrosion and electrode collapse. Herein, a dual-metal single-atom Fe-Mn-N-C catalyst with superior stability (49% loss in peak power density) than Fe-N-C catalysts (66% loss) over 96 h of continuous operations in H₂-O₂ fuel cells is reported. Advanced operando electrochemical and post-mortem physical measurements shed light on the underlying mechanism. The iron-manganese bond anchors the iron strongly in the Fe-Mn-N-C centre, which lowers the h

SUBMITTER: Liu S 

PROVIDER: S-EPMC12391655 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature