Room-temperature hydrogen adsorption in Pd nanoparticle decorated UiO-66-NH2 via spillover

To improve room-temperature hydrogen storage, palladium (Pd) nanoparticles were innovatively decorated by carbon bridge onto the amino-group functioned Zr-terephthalate metal-organic framework (MOF) UiO-6 6 to reduce the diffusion energy barrier and then improve the hydrogen spillover effect. Powder X-ray diffraction shows broad Pd peak and retained UiO-66-NH2 2 integrity after Pd decoration. The hydrogen uptake capacity show that UiO-66-NH2-Pd 2-Pd exhibits best hydrogen storage performance than UiO-66-NH2 2 and pristine UiO-66. The hydrogen up taken in Pd decorated UiO-6 6 (UiO-66-NH2-1Pd) 2-1Pd) was close to 4 wt% under 20 MPa at room temperature. Density functional theory (DFT) calculations show that hydrogen adsorption energy of UiO-66-NH2-Pd 2-Pd was-0.5897 eV, which was much lower than that of UiO-66-NH2 2 (-0.3716 eV) and UiO-6 6 (-0.2975 eV). Ultimately, Pd decorated NH2 2 group functioned UiO-6 6 enable improve storage capacities through hydrogen spillover under ambient conditions which could satisfy the demand for sustainable energy, especially for the long-term storage energy media. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.