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Influence of the synthesis parameters on the proton exchange membrane fuel cells performance of Fe–N–C aerogel catalysts

DOI: 10.1016/j.jpowsour.2021.230561 DOI Help

Authors: Youling Wang (MINES ParisTech, PSL University) , Mikkel J. Larsen (IRD Fuel Cells A/S) , Sergio Rojas (Instituto de Catálisia s y Petroleoquímca, CSIC) , Moulay-Tahar Sougrati (ICGM, Univ. Montpellier, CNRS) , Frédéric Jaouen (ICGM, Univ. Montpellier, CNRS) , Pilar Ferrer (Diamond Light Source) , Diego Gianolio (Diamond Light Source) , Sandrine Berthon-Fabry (MINES ParisTech, PSL University)
Co-authored by industrial partner: Yes

Type: Journal Paper
Journal: Journal Of Power Sources , VOL 514

State: Published (Approved)
Published: December 2021
Diamond Proposal Number(s): 22152

Abstract: Fe–N–C aerogel catalysts were prepared by sol–gel polycondensation of resorcinol, melamine and formaldehyde precursors in the presence of FeCl3 salt, followed by supercritical drying and thermal treatments. The effect of the mass ratio of precursors on the microstructure, iron speciation and oxygen reduction reaction (ORR) performance of the Fe–N–C aerogels was investigated by N2 sorption, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Mössbauer spectroscopy, X-ray absorption spectroscopy, CO chemisorption and rotating disk electrode in acidic medium. The best ORR performance (activity and mass transport) was obtained by an optimum balance between pore structure and active Fe-Nx species. Through acid washing, the durability of the catalyst was further improved by eliminating unstable and inactive species, particularly iron nanoparticles and iron carbide. From the CO chemisorption and turnover-frequency value, the surface sites were comparable with the highest values reported in literature. Finally, Fe–N–C aerogel catalyst was implemented a in membrane–electrode assembly with an active area of 25 cm2 and tested in single cell, emphasizing the importance of the ink formulation on the performance.

Journal Keywords: Non-precious metal catalyst; Carbon aerogel; Acidic media; Oxygen reduction reaction; PEMFCs

Diamond Keywords: Fuel Cells

Subject Areas: Chemistry, Energy

Instruments: B18-Core EXAFS

Added On: 05/10/2021 08:31

Discipline Tags:

Energy Storage Earth Sciences & Environment Sustainable Energy Systems Energy Climate Change Physical Chemistry Catalysis Chemistry

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)