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Destabilization of Mg-H bonding through nano-interfacial confinement by unsaturated carbon for hydrogen desorption
Yi Jia1, Chenghua Sun, Lina Cheng
1ARC Centre of Excellence for Functional Nanomaterials, Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, St Lucia QLD 4072, Brisbane, Australia.
Abstract:
We propose a new mechanism for destabilizing Mg-H bonding by means of a combination of the size effect and MgH2-carbon scaffold interfacial bonding, and experimentally realize low temperature hydrogen release starting from 50 °C using an MgH2@CMK-3 nanoconfinement system (37.5 wt% MgH2 loading amount). Based on computational calculations, it is found that the charge transfer from MgH2 to the carbon scaffold plays a critical role in the significant reduction of thermodynamics of MgH2 dehydrogenation. Our results suggest how to explore an alternative route for the enhancement of nano-interfacial confinement to destabilize the Mg-H hydrogen storage system.
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