2020
DOI: 10.3389/fchem.2020.00207
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Enhanced Hydrogen Storage Properties of MgH2 Using a Ni and TiO2 Co-Doped Reduced Graphene Oxide Nanocomposite as a Catalyst

Abstract: To improve the hydrogen storage properties of Mg/MgH 2 , a Ni and TiO 2 co-doped reduced graphene oxide [(Ni-TiO 2)@rGO] nanocomposite is synthesized by a facile impregnation method and introduced into Mg via ball milling. The results demonstrated that the dispersive distribution of Ni and TiO 2 with a particle size of 20-200 nm in the reduced graphene oxide matrix led to superior catalytic effects on the hydrogen storage properties of Mg-(Ni-TiO 2)@rGO. The initial hydrogenation/dehydrogenation temperature fo… Show more

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Cited by 22 publications
(2 citation statements)
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“…After activation, the reversible reaction of the hydrogen cycle is the synthesis and decomposition of MgH 2 and Mg 2 NiH 4 . According to the related literature, 25,26 PrH 2 has high thermal stability and is not easy to decompose. Secondly, the PR element with appropriate electronegativity in PrH 2 will weaken the Mg H bond 27 and significantly reduce the energy barrier overcome in a dehydrogenation reaction.…”
Section: Phase Composition and Microstructurementioning
confidence: 99%
“…After activation, the reversible reaction of the hydrogen cycle is the synthesis and decomposition of MgH 2 and Mg 2 NiH 4 . According to the related literature, 25,26 PrH 2 has high thermal stability and is not easy to decompose. Secondly, the PR element with appropriate electronegativity in PrH 2 will weaken the Mg H bond 27 and significantly reduce the energy barrier overcome in a dehydrogenation reaction.…”
Section: Phase Composition and Microstructurementioning
confidence: 99%
“…However, the unfavorably high thermal stability and sluggish dehydrogenation kinetics significantly limit its practical application ( Luo et al, 2019 ; Zhang et al, 2020a ). Many attempts have been carried out to improve the dehydrogenation and rehydrogeantion properties of MgH 2 , including alloying ( Hardian et al, 2018 ; Hui et al, 2020 ; Ali and Ismail, 2021 ), nanoengineering ( Zhang et al, 2020a ; Zhang et al, 2021c ; Thi Thu et al, 2021 ), and catalyst addition ( Zhong et al, 2018 ; Li et al, 2019b ; Liu et al, 2020b ; Zhang et al, 2020b ; Ding et al, 2020 ; Singh et al, 2020 ; Sun et al, 2020 ; Wang and Deng, 2020 ; Yao et al, 2020 ; Zeng et al, 2020 ; Zhu et al, 2020 ; Lu et al, 2021a ; Lu et al, 2021b ; Liu et al, 2021c ; Liu et al, 2021 ), etc. Li is also a H-absorbing metal and has a hydrogen capacity of 11.5 wt.%.…”
Section: Introductionmentioning
confidence: 99%