(478d) Metal- and MOF-Doped Carbonaceous Adsorbents for Selective Hydrogen Storage at Ambient Temperature

Storage is one of the main challenges that hinder wide implementation of hydrogen as a fuel. In this work, Cu-BTC MOF was hybridized with ultralow amount of GO by in-situ growth, activated carbon was doped with various metals (Pd, Pt, and Li), GO was decorated with Li, and surface modified CNT was doped with Pd, to comparatively assess the resulting carbon-based hybrids for selective hydrogen storage at ambient temperature. Indicatively, a 60% higher H₂ storage capacity was obtained at 298 K and 1 bar for the Cu-BTC/GO hybrid compared to pure MOF, together with a 49% and 38.5% higher H₂/O₂ and H₂/N₂ selectivity, respectively. Similarly, metal deposition of AC resulted in a 7.6, 6.4, and 5.5-fold higher storage capacity at 298 K and 3 bar for Li, Pt, and Pd - doped systems, respectively. Furthermore, at 298 K and 3 bar, Li-GO and Pd-CNT had 11 and 4.5-fold higher storage capacity, respectively, than their corresponding carbonaceous forms.

Acknowledgement:

Support by the Center for Catalysis and Separations (CeCaS, RC2-2018-024) of Khalifa University is greatly acknowledged.

References:

[1] A.M. Varghese, K.S.K. Reddy, G.N. Karanikolos, Ind. Eng. Chem. Res. 61.18 (2022) 6200-6213.

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