Issue 38, 2024

High-load Mg2Ni nanoparticle-carbon nanofiber composites for hydrogen storage

Abstract

Herein, a simple synthesis method for Mg2Ni composites with carbon nanofibers capable of hydrogen storage is presented. Specifically, n-butyl-sec-butyl-magnesium solution in hexane (C8H18Mg, 0.7 M) and bis-cyclopentadienyl nickel(II) (nickelocene or NiCp2) were used as precursors for the Mg2Ni nanoparticles. Subsequently, the nanoparticles were composited with carbon nanofibers (CNF) with high loading of Mg2Ni of 50 wt%, 75 wt%, 90 wt%, and 100 wt%. The physicochemical characterization of the materials indicated that the size of the as-prepared Mg2Ni nanoparticles was less than 5 nm and they were highly agglomerated due to a carbon-based binder. The best hydrogen storage values were determined to be 2.6–2.7 wt%. Among the tested materials, the composite with 75 wt% of Mg2Ni in CNF presented the best hydrogen uptake. The pressure–composition–temperature curves indicated changes in the hydriding equilibrium pressures of the Mg2Ni nanoparticles compared to the material with a similar composition produced using ball-milling and thermodynamic calculations. Thus, the results presented herein indicate the beneficial effect of nanosizing on hydriding reactions.

Graphical abstract: High-load Mg2Ni nanoparticle-carbon nanofiber composites for hydrogen storage

Supplementary files

Article information

Article type
Paper
Submitted
19 Apr 2024
Accepted
19 Aug 2024
First published
10 Sep 2024

Nanoscale, 2024,16, 17908-17925

High-load Mg2Ni nanoparticle-carbon nanofiber composites for hydrogen storage

E. D. Ruiz-Santacruz, J. D. J. Vega-Soria, A. K. Cruz-Jiménez, U. Caudillo-Flores, N. L. Torres-García and K. Suárez-Alcántara, Nanoscale, 2024, 16, 17908 DOI: 10.1039/D4NR01725K

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