Interactions of Hydrogen with Pd@MOF Composites

Abstract

Physisorption and chemisorption of hydrogen on solid-state materials are two fundamentally different interactions, both of which display advantages and drawbacks for hydrogen storage. It has been hypothesised that their combination by merging two classes of materials showing different sorption behaviour towards hydrogen in the same composite may synergistically combine their desirable properties. As representatives of such composites, palladium nanoparticles, nanoclusters, and single atoms have been encapsulated in a metal-organic framework matrix, embedded, or immobilised in its pores, respectively. In this minireview, we review advances on the understanding and potential applications of the combination of Pd with metalorganic framework matrices through the analysis of the nanocomposite materials' interaction with hydrogen and sorption properties.[a] Dr.

Size-dependent hydrogen trapping in palladium nanoparticles

“…Important modifications of the hydrogen sorption properties with decreasing the Pd particle size have been reported : improved kinetics, modified thermodynamics and changes in the Pd-H phase diagram. [7][8][9][10] The overwhelming experimental studies and numerous reviews 8,[11][12][13] agree to describe the following features: the hydrogen solubility in the solid solution (α phase) enhances by decreasing the size while the hydrogen solubility in the hydride phase (β phase) diminishes with reducing the particle size.…”

Recent Development in Nanoconfined Hydrides for Energy Storage

“…The proper term for describing the materials resulting from the nanoconfinement of active hydride source into a nanoporous matrix is nanocomposite [4,41,52,54,60,66,[68][69][70]77,78].…”

“…Metal-organic frameworks (MOFs) have recently been utilized as hosts for metal hydrides, due to their tunable porosity, stability and enhancement of kinetic and thermodynamic properties of hydrogen storage materials (Table 3). Their functionalization with appropriate groups/molecules opens new doors in energy storage field, being able to bypass side-reactions, alter significantly the reaction pathway, and afford a better reversible material in hydrogen release/uptake studies [39,40,68,86,[147][148][149][150][151][152][153][154][155][156][157].…”

Accelerated FeIII/FeII redox cycle of Fenton reaction system using Pd/NH2-MIL-101(Cr) and hydrogen

“…With huge open metal sites and specific surface area, the metal-organic frameworks (MOFs) materials have gained more and more attation in the field of hydrogen storage [17][18][19][20][21][22][23][24][25][26][27][28][29], adsorption of pollutants [30][31][32], separation of gas component [33,34], monitoring pollutants [35,36] and hydrogen production [37,38]. And it could also be used as a carrier for noble metal catalysts, especially for Pd 0 [39][40][41][42][43].…”