Dual Metal Fe–Mn–N–C Sites with Improved Stability for the Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cell DOI Creative Commons
Shiyang Liu, Md Raziun Bin Mamtaz, Jia Chen

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract Low‐cost and durable hydrogen fuel cells are crucial for the success of economy. While Fe–N–C catalysts amongst most promising low‐cost alternative to platinum (Pt) oxygen reduction reaction, their unsatisfactory durability is grand challenge faced by field due iron demetallation, carbon corrosion electrode collapse. Herein, a dual‐metal single‐atom Fe–Mn–N–C catalyst with superior stability (49% loss in peak power density) than (66% loss) over 96 h continuous operations H 2 –O reported. Advanced operando electrochemical post‐mortem physical measurements shed light on underlying mechanism. The iron–manganese bond anchors strongly centre, which lowers peroxide yield as result. Operando reveal more stable triple‐phase boundary environment Fe–N–C. Specifically, combination cyclic voltammetry impedance spectroscopy distribution relaxation times reveals that demetallation respectively 20% 30% slower cells. Altogether, this site strategy paves way improving Pt‐free

Language: Английский

Dual Metal Fe–Mn–N–C Sites with Improved Stability for the Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cell DOI Creative Commons
Shiyang Liu, Md Raziun Bin Mamtaz, Jia Chen

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract Low‐cost and durable hydrogen fuel cells are crucial for the success of economy. While Fe–N–C catalysts amongst most promising low‐cost alternative to platinum (Pt) oxygen reduction reaction, their unsatisfactory durability is grand challenge faced by field due iron demetallation, carbon corrosion electrode collapse. Herein, a dual‐metal single‐atom Fe–Mn–N–C catalyst with superior stability (49% loss in peak power density) than (66% loss) over 96 h continuous operations H 2 –O reported. Advanced operando electrochemical post‐mortem physical measurements shed light on underlying mechanism. The iron–manganese bond anchors strongly centre, which lowers peroxide yield as result. Operando reveal more stable triple‐phase boundary environment Fe–N–C. Specifically, combination cyclic voltammetry impedance spectroscopy distribution relaxation times reveals that demetallation respectively 20% 30% slower cells. Altogether, this site strategy paves way improving Pt‐free

Language: Английский

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