Synthesis of vanadium powder by magnesiothermic reduction of V2O3 in a reactive molten salt

Zhong, Dapeng; Pei, Guishang; Kang, Jia-long; Xiang, Junyi; Pan, Chuyu; Gu, Wu-an; Lv, Xuewei; Li, Lanjie

doi:10.1007/s42243-022-00865-6

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Recently, many kinds of oxides, including V 2 O 3 , TiO 2 , Cr 2 O 3 , etc., [28][29][30][31][32] have been used as catalytic additives to improve the performance of MgH 2 . Du et al synthesized V 2 O 3 supported by reduced graphene oxide (rGO) by impregnation and added rGO-supported V 2 O 3 to Mg 85 Al 15 alloy, the activation energies for hydrogen absorption and desorption were reduced to 61.6 and 91.3 KJ/mol, respectively [30].…”

Section: Introductionmentioning

confidence: 99%

Phase Transformation and Performance of Mg-Based Hydrogen Storage Material by Adding ZnO Nanoparticles

et al. 2023

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ZnO nanoparticles in a spherical-like structure were synthesized via filtration and calcination methods, and different amounts of ZnO nanoparticles were added to MgH2 via ball milling. The SEM images revealed that the size of the composites was about 2 μm. The composites of different states were composed of large particles with small particles covering them. After the absorption and desorption cycle, the phase of composites changed. The MgH2-2.5 wt% ZnO composite reveals excellent performance among the three samples. The results show that the MgH2-2.5 wt% ZnO sample can swiftly absorb 3.77 wt% H2 in 20 min at 523 K and even at 473 K for 1 h can absorb 1.91 wt% H2. Meanwhile, the sample of MgH2-2.5 wt% ZnO can release 5.05 wt% H2 at 573 K within 30 min. Furthermore, the activation energies (Ea) of hydrogen absorption and desorption of the MgH2-2.5 wt% ZnO composite are 72.00 and 107.58 KJ/mol H2, respectively. This work reveals that the phase changes and the catalytic action of MgH2 in the cycle after the addition of ZnO, and the facile synthesis of the ZnO can provide direction for the better synthesis of catalyst materials.

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