Effect of pore geometry on ultra-densified hydrogen in microporous carbons

Our investigations into molecular hydrogen (H2) confined in microporous carbons with different pore geometries at 77 K have provided detailed information on effects of shape densification H2 pressures up to 15 MPa. We selected three materials: a disordered, phenolic resin-based activated carbon, graphitic carbon slit-shaped pores (titanium carbide-derived carbon), and single-walled nanotubes, all comparable sizes <1 nm. show via combination situ inelastic neutron scattering studies, high-pressure adsorption measurements, modelling that both cylindrical diameter ?0.7 nm lead significant compared bulk under the same conditions, only subtle differences packing (and hence density) due geometric constraints. While geometry may play some part influencing diffusion kinetics arrangement molecules pores, size remains critical factor determining storage capacities. This confirmation confinement is essential understanding guiding development scale-up porous adsorbents are tailored for maximising capacities, particular sustainable energy applications.