Monolayer AsC5 as the Promising Hydrogen Storage Material for Clean Energy Applications

One of the critical techniques for developing hydrogen storage applications is the advanced research to build novel two-dimensional materials with significant capacity and effective reversibility. In this work, we perform first-principles unbiased structure search simulations to find a novel AsC5 mo...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2023-05, Vol.13 (9), p.1553
Main Authors: Lu, Qiang, Zhang, Binyuan, Zhang, Lianlian, Zhu, Yulian, Gong, Weijiang
Format: Article
Language:English
Subjects:
Adsorption
Approximation
AsC5 monolayer
Carbon
Clean energy
Clean technology
Coupling (molecular)
Critical point
Energy consumption
Energy industry
First principles
first-principles calculations
Graphene
Hydrogen
hydrogen storage material
Hydrogen storage materials
Monolayers
Simulation
Storage capacity
Substrates
Thermal stability
Two dimensional materials
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Summary:One of the critical techniques for developing hydrogen storage applications is the advanced research to build novel two-dimensional materials with significant capacity and effective reversibility. In this work, we perform first-principles unbiased structure search simulations to find a novel AsC5 monolayer with a variety of functionally advantageous characteristics. Based on theoretical simulations, the proposed AsC5 has been found to be energetically, dynamically, and thermally stable, supporting the viability of experiment. Since the coupling between H2 molecules and the AsC5 monolayer is quite weak due to physisorption, it is crucial to be enhanced by thoughtful material design. Hydrogen storage capacity can be greatly enhanced by decorating the AsC5 monolayer with Li atoms. Each Li atom on the AsC5 substrate is shown to be capable of adsorbing up to four H2 molecules with an advantageous average adsorption energy (Ead) of 0.19 eV/H2. The gravimetric density for hydrogen storage adsorption with 16Li and 64 H2 of a Li-decorated AsC5 monolayer is about 9.7 wt%, which is helpful for the possible application in hydrogen storage. It is discovered that the desorption temperature (TD) is much greater than the hydrogen critical point. Therefore, such crucial characteristics make AsC5-Li be a promising candidate for the experimental setup of hydrogen storage.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13091553