2025-03-132020Received: 4 may 2020/ Accepted:20 july 2020.http://hdl.handle.net/20.500.12272/12384: In this work, we report the synthesis and characterization of iron oxide nanoparticles supported in nanostructured carbon (CMK-3). This material is promising in the application of hydrogen adsorption for energy storage. The material with iron oxide nano particles (Fe-CMK-3) was successfully synthesized and characterized by X-ray diffraction, textural properties analysis, transmission and scanning electron microsco py, X-ray photoelectron spectroscopy, and magnetiza tion studies. A large amount of the iron incorporated as iron oxide nanoparticles was in the magnetite phase. The incorporation of magnetite on the CMK-3 carbon surface significantly improved the storage capacity of hydrogen (4.45 wt% at 77 K and 10 bar) compared with the CMK-3 framework alone (2.20 wt% at 77 K and 10 bar). The synthesized material is promising for hy drogen adsorption by weak bond forces (physisorption). A hydrogen adsorption mechanism was proposed in which the nanoparticles of magnetite have an important role.pdfeninfo:eu-repo/semantics/openAccessAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/MagnetiteCMK-3HydrogenStorageAdsorptionNanocompositesinfo:eu-repo/semantics/articleVenosta, Lisandro; Juárez, Juliana María; Anunziata, Oscar Alfredo; Bercoff, Paula; Gómez Costa, Marcos Bruno.https://creativecommons.org/licenses/by-nc-nd/4.0/