Reversible Hydrogen Storage in Metal-Decorated Honeycomb Borophene Oxide

Journal article (2021)

Authors

P. Habibi Process and Energy
T.J.H. Vlugt Engineering Thermodynamics - Mechanical, Maritime and Materials Engineering
P. Dey Team Poulumi Dey - Mechanical, Maritime and Materials Engineering
Poulumi Dey Team Poulumi Dey - Mechanical, Maritime and Materials Engineering
O. Moultos Engineering Thermodynamics - Mechanical, Maritime and Materials Engineering
Research Group
Engineering Thermodynamics (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2021 P. Habibi, T.J.H. Vlugt, P. Dey, O. Moultos
DOI: https://doi.org/10.1021/acsami.1c09865
More Info
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Published Date

2021

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Engineering Thermodynamics

Abstract

Two-dimensional (2D) boron-based materials are receiving much attention as H2 storage media due to the low atomic mass of boron and the stability of decorating alkali metals on the surface, which enhance interactions with H2. This work investigates the suitability of Li, Na, and K decorations on 2D honeycomb borophene oxide (B2O) for H2 storage, using dispersion corrected density functional theory (DFT-D2). A high theoretical gravimetric density of 8.3 wt % H2 is achieved for the Li-decorated B2O structure. At saturation, each Li binds to two H2 with an average binding energy of -0.24 eV/H2. Born-Oppenheimer molecular dynamics simulations at temperatures of 100, 300, and 500 K demonstrate the stability of the Li-decorated structure and the H2 desorption behavior at different temperatures. Our findings indicate that Li-decorated 2D B2O is a promising material for reversible H2 storage and recommend experimental investigation of 2D B2O as a potential H2 storage medium.