Peculiar interaction of guests with porous γ-Mg(BH4)2
(2017) E-MRS Fall Meeting — Location: Warsaw, Poland (18.September.2017)
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- Abstract
- We investigated an interaction of porous γ-Mg(BH4)2 with small gas molecules, using neutron powder diffraction to accurately localize the guests at low temperatures and synchrotron X-ray powder diffraction to collect data along the adsorption isobars. The latter allows to study structural changes with pressure and temperature variation, giving insight into guest-host and guest-guest interactions, as well as to extract relevant thermodynamic parameters. I will discuss the guest-host and guest-guest interactions, size effects, the role of hydridic hydrogen in physisorption, reactivity between the guest and the host. The specific examples of guests and the related phenomena to be covered are: • hydrogen vs nitrogen - difference of sizes yields different localization and adsorption capacities; high hydrogen adsorption density • adsorption properties in the C2 series (ethane, ethylene and acetylene) and their relation to the size and acidity of the hydrocarbons • methane & ethane - size effects, interaction with the host, high adsorption enthalpies • CO2 - interaction with the host and high reactivity of the framework • noble gases - competition of guest-guest and guest-host interactions • ammonia borane - nanoconfinement of chemical hydride in complex hydride?
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Filinchuk, Y. (2017). Peculiar interaction of guests with porous γ-Mg(BH4)2. E-MRS Fall Meeting, Warsaw, Poland. https://hdl.handle.net/2078.5/126788