165227 20251219174251.0 doi 10.1016/j.cej.2025.171198 sideral 147024 ART-2025-147024 eng Pakrieva, Ekaterina Universidad de Zaragoza 3-component (N, Fe, Co) atomically dispersed ORR catalysts prepared by laser-driven decomposition of organic precursors 2025 The sluggish kinetics of the oxygen reduction reaction (ORR) remain a key bottleneck for the commercialization of proton exchange membrane fuel cells (PEMFCs), driving the search for efficient, non-precious metal catalysts. Herein, we present a laser-assisted pyrolysis strategy for the synthesis of nitrogen-doped carbon (NC) materials, both metal-free and containing atomically dispersed Fe and Co, using aerosolized phthalocyanine precursors and a near-instantaneous rapid decomposition under a high-energy laser beam, while preventing metal aggregation. A single-step post-synthetic thermal activation under an NH₃/N₂ atmosphere further tailors the textural and surface properties, without requiring ammonia co-feeding during laser pyrolysis, acid etching, or multiple treatments, marking a significant improvement over our previously reported single atom (Fe-N/C) protocols. The resulting Fe_Co/NC_tr catalyst exhibits high specific surface area, enhanced microporosity, improved graphitization, and increased abundance of electrochemically beneficial nitrogen sites. Compared to our earlier reported Fe–N/C catalysts, Fe_Co/NC_tr delivers significantly higher limiting current densities and enhanced durability in alkaline media. Overall, the developed Fe_Co/NC catalyst exhibits good ORR catalytic activity and outstanding long-term stability in alkaline media, comparable to the state-of-the-art commercial Pt/C catalysts. Cyanide poisoning tests confirm the essential role of atomically dispersed Fe2+ and Co2+ as active ORR sites. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S info:eu-repo/grantAgreement/ES/AEI/PID2020-114926RB-I00 info:eu-repo/grantAgreement/ES/AEI/PID2023-146481OB-I00 info:eu-repo/grantAgreement/ES/DGA/T03-23R info:eu-repo/grantAgreement/ES/UZ-DGA/T57-23R info:eu-repo/grantAgreement/ES/MICINN/CNS2022-135911 info:eu-repo/grantAgreement/ES/MICINN/JDC2022-049007-I info:eu-repo/grantAgreement/ES/MICINN/PID2022-139671OB-I00 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Hernandez-Ferrer, Javier Martinez, Gema Balas, Francisco Universidad de Zaragoza (orcid)0000-0001-5512-0075 García-Bordeje, Enrique (orcid)0000-0001-8158-1270 Anson-Casaos, Alejandro (orcid)0000-0002-3134-8566 Simonelli, Laura Bartolome, Fernando (orcid)0000-0002-0047-1772 Benito, Ana M. (orcid)0000-0002-8654-7386 Maser, Wolfgang K. Hueso, Jose L. Universidad de Zaragoza (orcid)0000-0002-4546-4111 Santamaria, Jesus Universidad de Zaragoza (orcid)0000-0002-8701-9745 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 5005 790 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Tecnologi. Medio Ambiente 526 (2025), 171198 [13 pp.] Chem. eng. j. Chemical Engineering Journal 1385-8947 5354730 http://zaguan.unizar.es/record/165227/files/texto_completo.pdf Versión publicada 2407841 http://zaguan.unizar.es/record/165227/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:165227 articulos driver 2025-12-19-14:43:24 ARTICLE