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Synthesis and characteristics of CMK-3 modified with magnetite nanoparticles for application in hydrogen storage

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Abstract

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 nanoparticles (Fe-CMK-3) was successfully synthesized and characterized by X-ray diffraction, textural properties analysis, transmission and scanning electron microscopy, X-ray photoelectron spectroscopy, and magnetization 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 hydrogen adsorption by weak bond forces (physisorption). A hydrogen adsorption mechanism was proposed in which the nanoparticles of magnetite have an important role.

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Acknowledgments

The authors are indebted to E.M. Euti for the XPS data analysis.

Funding

J.M.J., M.G.C., L.F.V., and O.A.A. thank financial support of CONICET Argentina and PICT-1740-Foncyt. J.M.J. thanks financial support of PICT 2016-1135-Foncyt. P.G.B. acknowledges funding from Secyt-UNC, Conicet, and Foncyt.

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Correspondence to Juliana M. Juárez.

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Venosta, L.F., Juárez, J.M., Anunziata, O.A. et al. Synthesis and characteristics of CMK-3 modified with magnetite nanoparticles for application in hydrogen storage. J Nanopart Res 22, 227 (2020). https://doi.org/10.1007/s11051-020-04964-x

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  • DOI: https://doi.org/10.1007/s11051-020-04964-x

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