Room-temperature hydrogen adsorption in Pd nanoparticle decorated UiO-66-NH2 via spillover--颗粒学报PARTICUOLOGY

Wang, J., Luo, J., Yao, Y., Song, J., & Shi, Y. (2024). Room-temperature hydrogen adsorption in Pd nanoparticle decorated UiO-66-NH2 via spillover. Particuology, 93, 309-315. https://doi.org/10.1016/j.partic.2024.07.008

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

Jingchuan Wang^*, Junhong Luo, Yong Yao, Jiangfeng Song, Yan Shi

Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China

10.1016/j.partic.2024.07.008

Volume 93, October 2024, Pages 309-315

Received 28 May 2024, Revised 4 July 2024, Accepted 13 July 2024, Available online 23 July 2024, Version of Record 29 July 2024.

E-mail: wjchit@163.com

Highlights

• Pd-nanoparticles were decorated on UiO-66-NH₂ to reduce diffusion energy barrier.

• Pd-nanoparticles were decorated on UiO-66-NH₂ could increase the hydrogen spillover effect.

• The hydrogen up taken in UiO-66-NH₂-1Pd was 3.7 wt% under 20 MPa at 298 K.

• DFT calculations show that H_ads of UiO-66-NH₂-Pd was much lower than that of UiO-66-NH₂ and UiO-66.

Abstract

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-66 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 integrity after Pd decoration. The hydrogen uptake capacity show that UiO-66-NH₂-Pd exhibits best hydrogen storage performance than UiO-66-NH₂ and pristine UiO-66. The hydrogen up taken in Pd decorated UiO-66 (UiO-66-NH₂-1Pd) 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 was −0.5897 eV, which was much lower than that of UiO-66-NH₂ (−0.3716 eV) and UiO-66 (−0.2975 eV). Ultimately, Pd decorated NH₂ group functioned UiO-66 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.

Graphical abstract

Keywords

Hydrogen storage; UiO-66-NH₂; Pd decorated; Spillover

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