Affiliation:
1. Department of Chemical Science and Technologies University of Rome Tor Vergata Via della Ricerca Scientifica 00133 Rome Italy
2. Department of Physics Sapienza University of Rome Piazzale Aldo Moro 2 00185 Rome Italy
3. Institute for Advanced Energy Technologies “Nicola Giordano”-CNR-ITAE Via S. Lucia Sopra Contesse 5 98126 Messina Italy
4. International Iberian Nanotechnology Laboratory (INL) Braga 4715-330 Portugal
Abstract
AbstractHigh‐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.
Subject
Electrochemistry,Catalysis
Cited by
4 articles.
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