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• W2777169076 endingPage "168" @default.
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• W2777169076 abstract "In this work, we present a facile way to fabricate ultrathin carbon layer encapsulated air-stable Mg nanoparticles ([email protected] NPs) by methane plasma metal reaction method. Compared with pure Mg NPs, the carbon layer can not only reduce particle size but also prevent Mg from oxidation. By adjust methane from 10 to 300 ml, average size of [email protected] NPs reduces from 140 to 60 nm and thickness of carbon layer increases from 1 to 4 nm. After exposure in air for 3 months, little MgO can be detected in [email protected] NPs. In these [email protected] samples, [email protected] (CH4:50 ml) with size of 80 nm and ultrathin amorphous carbon shell of 3 nm shows the highest hydrogen capacity of 6.3 wt% H2. In comparison, the hydrogen capacities of [email protected] (CH4:10 ml) and [email protected] (CH4:300 ml) are only 5.4 wt% H2 and 4.3 wt% H2, respectively. [email protected] (CH4:50 ml) also displays the highest hydrogenation and dehydrogenation rates which can absorb 4.8 wt% H2 within 10 min at 573 K and desorb 5.0 wt% H2 within 20 min at 623 K. The apparent energies for hydrogenation and dehydrogenation of [email protected] (CH4:50 ml) are 64.1 and 107.2 kJ mol−1, both smaller than [email protected] (CH4:10 ml) of 66.7 and 118.9 kJ mol−1 and [email protected] (CH4:300 ml) of 67.7 and 137.8 kJ mol−1. The enhanced hydrogen storage properties of [email protected] (CH4:50 ml) are attributed to smaller particles size and excellent antioxidant properties provided by the ultrathin carbon layer." @default.
• W2777169076 created "2018-01-05" @default.
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• W2777169076 date "2018-04-01" @default.
• W2777169076 modified "2023-10-18" @default.
• W2777169076 title "Facile fabrication of ultrathin carbon layer encapsulated air-stable Mg nanoparticles with enhanced hydrogen storage properties" @default.
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• W2777169076 doi "https://doi.org/10.1016/j.cej.2017.12.087" @default.
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