RT journal article
T1 Straightforward Synthesis Methodology for Obtaining Excellent ORR Electrocatalysts From Biomass Residues Through a One Pot-High Temperature Treatment Approach
A1 Alemany-Molina, G.
A1 Pabón-Román, K. M.
A1 Chinchilla Reyes, Lidia Esther
A1 Calvino Gámez, José Juan
A1 Morallón, E.
A1 Cazorla-Amorós, D.
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 almond shell
K1 biomass-derived
K1 Fe-N-C catalysts
K1 oceanic posidonia
K1 one pot synthesis
K1 ORR
K1 Zn-air battery
AB Materials prepared from biomass residues are potential candidates to substitute the Pt-based commercial electrocatalysts in oxygen reduction reaction (ORR). Although some investigations have reported activity and durability comparable to Pt/C using biomass-derived catalysts based on Fe─N─C sites, it remains a challenge to decrease the environmental impact of the production of these materials. A straightforward procedure is developed to obtain excellentORR electrocatalysts from biomass residues which requires a single high-temperature treatment. The final washing step is avoided by optimizing the initial amount of Fe precursor (FeC2O4). Besides the formation of iron oxide nanoparticles, a highly dispersed Fe phase is detected by High Angle Annular Dark Field Scanning Transmission Electron Microscopy and Energy Dispersive X-Ray Spectroscopy (HAADF-STEM-XEDS) analysis as well as graphitic carbon structures. The best performance for almond shell-based electrocatalysts is achieved for the sample containing 4.6 wt. % of Fe. The procedure developed is also applied to oceanic posidonia and eucalyptus residues, also showing excellent ORR behavior. The best sample is studied in a primary Zn-air battery (ZAB) obtaining a maximum power density of 59 mW cm−2 and 755 mAh gZn−1 capacity.
PB John Wiley and Sons Inc.
SN 2366-7486
YR 2025
FD 2025
LK http://hdl.handle.net/10498/35828
UL http://hdl.handle.net/10498/35828
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026