Hybrid hollow structures for hydrogen storage

摘要

Nanohybrids have shown considerable promise for hydrogen storage due to their enhanced capacity and fast kinetics. Hollow nanostructures have attracted considerable attention in diverse contexts and recently have been envisaged as nanocontainers for hydrogen storage. In the current work a two-scale novel hollow nanohybrid is synthesized, wherein the outer Ni 'capsule' plays a catalytic role in the breakdown of hydrogen molecule into atomic form and the inner Mg hollow structure enhances the hydrogen storage via a multi-mode storage philosophy developed recently. The structure of the dual-phase nanohybrid is elucidated using transmission electron microscopy and selected area diffraction patterns and characterized for hydrogen storage via pressure-compositionisotherms. The system shows good hydrogen storage capacity (similar to 5 wt% at 10 bar & 180 degrees C); coupled with fast kinetics. The hydrogen is stored in an additional form than that reported earlier (interstitial compound). (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.