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Hydrogen adsorption on Ni-functionalized saponites and their precursor gel
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DOI：10.1016/j.ijhydene.2023.10.314.png)
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Abstract
En 中文
Here we propose to investigate Ni-functionalized saponite (smectite group) as a viable alternative for low cost H-2 storage for land-based applications. The precursor gel used for saponite synthesis is also tested with respect to its H-2 adsorption properties. Adsorption isotherms recorded at 77 K and 1 bar, 298 K and 120 bar indicate that nickel functionalization does not induce a clear structural or chemical control on the adsorption process. However, Ni-pillared saponites outgassed at 70 C display a four-time enhanced H-2 uptake (up to 0.12 wt% at 77 K and 1 bar) compared to its counterpart outgassed at 150 C. Another important finding of this study is the surprisingly high H-2 uptakes of the gel (nano-crystallized) precursor, used for the synthesis of saponite samples (up to 0.19 wt% at 77 K and 1 bar, and up to 0.12 wt% at 298 K and 120 bar).
Keywords:
Clay materials
Saponite
H-2 adsorption
Isotherms
Specific surface area
Ni functionalization
Hydrogen storage
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