MgH 2 nanoparticles confined in reduced graphene oxide pillared with organosilica: a novel type of hydrogen storage material.

Autor:	Yan F; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands. p.rudolf@rug.nl., Moretón Alfonsín E; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands. p.rudolf@rug.nl., Ngene P; Materials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, the Netherlands., de Graaf S; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands. p.rudolf@rug.nl., De Luca O; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands. p.rudolf@rug.nl., Cao H; Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, 9747AG Groningen, the Netherlands., Spyrou K; Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece., Lu L; Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, 9747AG Groningen, the Netherlands., Thomou E; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands. p.rudolf@rug.nl.; Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece., Pei Y; Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, 9747AG Groningen, the Netherlands., Kooi BJ; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands. p.rudolf@rug.nl., Gournis DP; Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.; School of Chemical and Environmental Engineering, Technical University of Crete, 73100 Chania, Crete, Greece., de Jongh PE; Materials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, the Netherlands., Rudolf P; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands. p.rudolf@rug.nl.
Jazyk:	angličtina
Zdroj:	Nanoscale [Nanoscale] 2024 Aug 22; Vol. 16 (33), pp. 15770-15781. Date of Electronic Publication: 2024 Aug 22.
DOI:	10.1039/d4nr01524j
Abstrakt:	Hydrogen is a promising alternative fuel that can push forward the energy transition because of its high energy density (142 MJ kg -1 ), variety of potential sources, low weight and low environmental impact, but its storage for automotive applications remains a formidable challenge. MgH 2 , with its high gravimetric and volumetric density, presents a compelling platform for hydrogen storage; however, its utilization is hindered by the sluggish kinetics of hydrogen uptake/release and high temperature operation. Herein we show that a novel layered heterostructure of reduced graphene oxide and organosilica with high specific surface area and narrow pore size distribution can serve as a scaffold to host MgH 2 nanoparticles with a narrow diameter distribution around ∼2.5 nm and superior hydrogen storage properties to bulk MgH 2 . Desorption studies showed that hydrogen release starts at relatively low temperature, with a maximum at 348 °C and kinetics dependent on particle size. Reversibility tests demonstrated that the dehydrogenation kinetics and re-hydrogenation capacity of the system remains stable at 1.62 wt% over four cycles at 200 °C. Our results prove that MgH 2 confinement in a nanoporous scaffold is an efficient way to constrain the size of the hydride particles, avoid aggregation and improve kinetics for hydrogen release and recharging.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu