Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8948275 | International Journal of Hydrogen Energy | 2018 | 7 Pages |
Abstract
Mg-based materials as potential hydrogen storage candidates, however, are suffering from sluggish kinetics during absorption and desorption processes. Here in this work, embedding Mg particles on few-layer graphene nanosheets (FLG) via dielectric barrier discharge plasma (DBDP) assisted milling was synthesized to improve hydrogen storage properties of Mg particles. The SEM observation demonstrates that Mg particles are distributed uniformly on the surface of the graphite layer in the Mg@FLG composite. The obtained Mg-based composite (Mg@FLG) shows a hydrogen storage capacity of â¼5 wt%. From the isothermal dehydrogenation kinetic curves, the composite could desorb â¼4.5 wt% hydrogen within 25 min at 300 °C. Compared with pure Mg, the dehydriding kinetics of the hydrogenated Mg@FLG composite is significantly elevated, showing an activation energy of 155 J/(mol·K). In addition, the dehydrogenation peak temperature of the Mg@FLG decreases dramatically from 431 to 329 °C for MgH2. This work implies a promising composite formation technique in Mg-based materials to enhance hydrogen storage kinetics.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Chengguang Lang, Liuzhang Ouyang, Lingli Yang, Leyang Dai, Daifeng Wu, Huaiyu Shao, Min Zhu,