This work reports the development of an iron-nitrogen-carbon electrocatalyst (Fe-N-C) synthesized by functionalization of carbon support using low-cost Fe- and N-based precursors in a wet impregnation procedure followed by a pyrolysis treatment under an inert atmosphere. Structure and surface chemistry were investigated by Raman and X-ray photoelectron spectroscopy (XPS), which indicated an efficient interaction of precursors with the carbon support during the wet-impregnations step, which allows obtaining a carbonized material with a high content of active sites based on Fe-Nx moieties. This led to Fe-N-C materials with high catalytic activity towards oxygen reduction at neutral pH, as demonstrated by cyclic voltammetry (CV) and hydrodynamic linear sweep voltammetry with rotating ring disk electrode (LSV-RRDE). The Fe-N-C electrocatalyst was incorporated in air-breathing cathodes and performance was optimized in terms of oxygen reduction activity and stability. Such cathodes were assembled in single-chamber microbial fuel cell prototypes, and electrical power and voltage generation were evaluated over time.

da Silva Freitas, W., Gemma, D., Mecheri, B., D'Epifanio, A. (2022). Air-breathing cathodes for microbial fuel cells based on iron-nitrogen-carbon electrocatalysts. BIOELECTROCHEMISTRY, 146 [10.1016/j.bioelechem.2022.108103].

Air-breathing cathodes for microbial fuel cells based on iron-nitrogen-carbon electrocatalysts

Mecheri B.
;
D'Epifanio A.
2022

Abstract

This work reports the development of an iron-nitrogen-carbon electrocatalyst (Fe-N-C) synthesized by functionalization of carbon support using low-cost Fe- and N-based precursors in a wet impregnation procedure followed by a pyrolysis treatment under an inert atmosphere. Structure and surface chemistry were investigated by Raman and X-ray photoelectron spectroscopy (XPS), which indicated an efficient interaction of precursors with the carbon support during the wet-impregnations step, which allows obtaining a carbonized material with a high content of active sites based on Fe-Nx moieties. This led to Fe-N-C materials with high catalytic activity towards oxygen reduction at neutral pH, as demonstrated by cyclic voltammetry (CV) and hydrodynamic linear sweep voltammetry with rotating ring disk electrode (LSV-RRDE). The Fe-N-C electrocatalyst was incorporated in air-breathing cathodes and performance was optimized in terms of oxygen reduction activity and stability. Such cathodes were assembled in single-chamber microbial fuel cell prototypes, and electrical power and voltage generation were evaluated over time.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/07
English
Air-breathing cathodes
Iron-nitrogen-carbon catalysts
Microbial fuel cells
Oxygen reduction reaction
Rotating ring disk electrode
Surface chemistry
POR FESR LAZIO 2014–2020, N◦ A0375-2020-36492
da Silva Freitas, W., Gemma, D., Mecheri, B., D'Epifanio, A. (2022). Air-breathing cathodes for microbial fuel cells based on iron-nitrogen-carbon electrocatalysts. BIOELECTROCHEMISTRY, 146 [10.1016/j.bioelechem.2022.108103].
da Silva Freitas, W; Gemma, D; Mecheri, B; D'Epifanio, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/298229
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