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 (E1/2=0.84 V) and 1.3 Fe (E1/2=0.83 V) catalysts, which were assembled at the cathode of a H2-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.

Ricciardi, B., Mecheri, B., da Silva Freitas, W., Ficca, V., Placidi, E., Gatto, I., et al. (2023). Porous iron-nitrogen-carbon electrocatalysts for anion exchange membrane fuel cells (AEMFC). CHEMELECTROCHEM, 10(7) [10.1002/celc.202201115].

Porous iron-nitrogen-carbon electrocatalysts for anion exchange membrane fuel cells (AEMFC)

Mecheri B.
;
D'Epifanio A.
2023-01-01

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 (E1/2=0.84 V) and 1.3 Fe (E1/2=0.83 V) catalysts, which were assembled at the cathode of a H2-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
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/07
English
Con Impact Factor ISI
alkaline fuel cells
Fe−Nx-C active sites
mesoporous carbon
oxygen reduction reaction
platinum group metal-free electrocatalysts
Ricciardi, B., Mecheri, B., da Silva Freitas, W., Ficca, V., Placidi, E., Gatto, I., et al. (2023). Porous iron-nitrogen-carbon electrocatalysts for anion exchange membrane fuel cells (AEMFC). CHEMELECTROCHEM, 10(7) [10.1002/celc.202201115].
Ricciardi, B; Mecheri, B; da Silva Freitas, W; Ficca, Vca; Placidi, E; Gatto, I; Carbone, A; Capasso, A; D'Epifanio, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/318818
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