High-performance platinum group metal-free (PGM-free) electrocatalysts were prepared from porous organic polymers (POPs) precursors with highly-porous structures and adjustable surface area. A resin phenol-melamine-based POP and an iron salt were used to synthesize Fe-N-C catalysts with different iron contents (0.2-1.3 wt.%). Electrochemical and spectroscopical characterization allowed us to elucidate the effect of Fe content on the material's structure, surface chemistry, and electrocatalytic activity toward the oxygen reduction reaction (ORR). The increase of iron content led to a specific surface area decrease, preserving the morphological structure, with the formation of highly-active catalytic sites, as indicated by X-ray photoelectron spectroscopy (XPS) analysis. The rotating ring disk electrode experiments, performed at pH=13, confirmed the high ORR activity of both 0.5 Fe (E-1/2=0.84 V) and 1.3 Fe (E-1/2=0.83 V) catalysts, which were assembled at the cathode of a H-2-fed anion exchange membrane fuel cells (AEMFC) equipped with a FAA-3-50 membrane, evidencing promising performance (0.5 Fe, maximum power density, Max PD=69 mA cm(-2) and 1.3 Fe, Max PD=87 mA cm(-2)) with further advancement prospects.

Porous Iron-Nitrogen-Carbon Electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC) / Ricciardi, B; Mecheri, B; Freitas, Wd; Ficca, Vca; Placidi, E; Gatto, I; Carbone, A; Capasso, A; D'Epifanio, A. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - 10:7(2023). [10.1002/celc.202201115]

Porous Iron-Nitrogen-Carbon Electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC)

Ficca, VCA;Placidi, E;
2023

Abstract

High-performance platinum group metal-free (PGM-free) electrocatalysts were prepared from porous organic polymers (POPs) precursors with highly-porous structures and adjustable surface area. A resin phenol-melamine-based POP and an iron salt were used to synthesize Fe-N-C catalysts with different iron contents (0.2-1.3 wt.%). Electrochemical and spectroscopical characterization allowed us to elucidate the effect of Fe content on the material's structure, surface chemistry, and electrocatalytic activity toward the oxygen reduction reaction (ORR). The increase of iron content led to a specific surface area decrease, preserving the morphological structure, with the formation of highly-active catalytic sites, as indicated by X-ray photoelectron spectroscopy (XPS) analysis. The rotating ring disk electrode experiments, performed at pH=13, confirmed the high ORR activity of both 0.5 Fe (E-1/2=0.84 V) and 1.3 Fe (E-1/2=0.83 V) catalysts, which were assembled at the cathode of a H-2-fed anion exchange membrane fuel cells (AEMFC) equipped with a FAA-3-50 membrane, evidencing promising performance (0.5 Fe, maximum power density, Max PD=69 mA cm(-2) and 1.3 Fe, Max PD=87 mA cm(-2)) with further advancement prospects.
2023
alkaline fuel cells; Fe-N-x-C active sites; mesoporous carbon; oxygen reduction reaction; platinum group metal-free electrocatalysts
01 Pubblicazione su rivista::01a Articolo in rivista
Porous Iron-Nitrogen-Carbon Electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC) / Ricciardi, B; Mecheri, B; Freitas, Wd; Ficca, Vca; Placidi, E; Gatto, I; Carbone, A; Capasso, A; D'Epifanio, A. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - 10:7(2023). [10.1002/celc.202201115]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1676629
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